Page 2777 of 6020
Engine Mechanical – V6 Page 6A1–298
Tool Number Illustration Description
J-45027
Tensioner Tool
Used to reset the timing chain tensioner plunger.
J-6125-1B
Slide Hammer
Used in conjunction with J-41818 to remove the main bearing
caps from the cylinder block during engine disassembly.
J-8062
Valve Spring Compressor
Used in conjunction with EN-46119 to remove valve springs
with the engine disassembled.
J-8087
Cylinder Bore Gauge
Commercial equivalent also available
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Engine Mechanical – V6 Page 6A1–1
Page 6A1–1
Section 6A1
Engine Mechanical – V6
ATTENTION
Before performing any service operation or other procedure described in this Section, refer to 1.1 WARNING,
CAUTION and NOTES for correct workshop practices with regard to safety and/or property damage.
1 General Information ............................................................................................................ ...................8
MY06 Update .................................................................................................................... ......................................8
1.1 WARNING, CAUTION and NOTES .................................................................................................... ...................8
Definition of WARNING, CAUT ION and NOTE Statements ............................................................................. ....8
WARNING defined ................................................................................................................ .............................8
CAUTION defined ................................................................................................................ ..............................8
NOTE defined................................................................................................................... ..................................9
1.2 Engine Components .............................................................................................................. ..............................10
Major Component Assemblies............................................................................................................................ 10
Intake Manifold Assembly ....................................................................................................... ............................11
Engine Front Cover............................................................................................................. .................................12
Camshaft Timing Components ..................................................................................................... ......................13
Camshaft Cove r Assembly........................................................................................................ ..........................14
Cylinder Head Assembly ......................................................................................................... ............................15
Oil Pump ....................................................................................................................... ........................................16
Engine Block Assembly .......................................................................................................... ............................17
Pistons, Rings, Bearing and Connecting Rod ..................................................................................... ..............18
Oil Pan Assembly............................................................................................................... ..................................19
Oil Filter Assembly ............................................................................................................ ..................................20
1.3 Engine Serial Number........................................................................................................... ...............................21
1.4 Engine Construction............................................................................................................ ................................22
Cylinder Block ................................................................................................................. .....................................22
Cylinder Heads ..................................................................................................................................................... 22
Crankshaft ..................................................................................................................... .......................................23
Pistons, Pins and Connecting Rods .............................................................................................. ....................23
Camshaft Driv e System ....................................................................................................................................... 24
1.5 Engine Lubrication System .................................................................................................................................25
Lubrication Description........................................................................................................ ...............................25
1.6 Service Notes .................................................................................................................. .....................................26
Cleanliness and Care........................................................................................................... ................................26
Replacing Engine Gaskets .................................................................................................................................. 26
Re-Using Gaskets and Applying Sealants......................................................................................... ...............26
Separating Co mponents................................................................................................................................... 26
Cleaning Gasket Surfaces ................................................................................................................................ 26
Assembling Components ................................................................................................................................. 26
Use of Room Temperature Vulcanising and Anaerobic Sealer....................................................................... .27
Room Temperature Vu lcanising Sealer............................................................................................ ................27
Anaerobic Sealer ............................................................................................................... ...............................27
Pipe Joint Compound ............................................................................................................ ...........................28
Separating Parts ............................................................................................................... ...................................28
Tools and Equipment ............................................................................................................ ..............................28
Fasteners .............................................................................................................................................................. 29
Clamp Load ..................................................................................................................... .................................29
Torque Angle and Torque to Yield Fastener s................................................................................................... 29
2 Diagnosis ...................................................................................................................... ........................30
2.1 Engine Diagnosis ............................................................................................................... ..................................30
2.2 Symptoms ....................................................................................................................... .....................................31
Strategy Based Diagnosis................................................................................................................................... 31
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Engine Mechanical – V6 Page 6A1–2
Page 6A1–2
Visual / Physical Inspection ................................................................................................... .............................31
Intermittent ................................................................................................................... ........................................31
2.3 Engine Misfire without In ternal Engine Noises .................................................................................. ...............32
2.4 Engine Misfire with Abnormal In ternal Lower Engine Noises...................................................................... ....34
2.5 Engine Misfire with Abno rmal Valve Train Noise ................................................................................. .............35
2.6 Engine Misfire with Coolant Consumption ........................................................................................ ................36
2.7 Engine Misfire with E xcessive Oil Consumption .................................................................................. ............37
2.8 Engine Noise on Start-up, but only Lasting a Few Seconds ....................................................................... .....38
2.9 Upper Engine Noise, Rega rdless of Engine Speed................................................................................. ..........39
2.10 Lower Engine Noise, Rega rdless of Engine Speed ................................................................................. .........40
2.11 Engine Noise Under Load ................................................................................................................................... 41
2.12 Engine Will Not Crank – Crankshaft Will Not Rotate ............................................................................. ...........42
2.13 Coolant in Com bustion Chamber .................................................................................................. .....................43
Definition ..................................................................................................................... .........................................43
2.14 Coolant in Engine Oil........................................................................................................................................... 44
Definition ..............................................................................................................................................................44
2.15 Engine Compression Test........................................................................................................ ...........................45
Preliminary Steps................................................................................................................................................. 45
Engine Cylinder Compression Test ............................................................................................... ....................45
Test Result Evaluation ......................................................................................................... ...............................45
2.16 Cylinder Leakage Test .......................................................................................................... ...............................46
2.17 Engine Oil Consumption Diagnosis ............................................................................................... ....................47
Definition ..................................................................................................................... .........................................47
2.18 Engine Oil Leak Diagnosis .................................................................................................................................. 48
Introduction ..........................................................................................................................................................48
Locating and Identifying the Leak .............................................................................................. ........................48
Visual Inspection .............................................................................................................. ...................................48
Powder Method .................................................................................................................. ..................................48
Black Light and Dye Method ............................................................................................................................... 48
Possible Causes for Engine Oil Leaks ........................................................................................... ....................49
2.19 Engine Oil Pressu re Diagnosis .................................................................................................. .........................50
2.20 Accessory Drive Belt Diagnosis ................................................................................................. ........................51
Tension Check .................................................................................................................. ...................................51
Inspect ........................................................................................................................ ..........................................52
Drive Belt Chirp .................................................................................................................................................... 53
Definition ..................................................................................................................... .....................................53
Diagnostic Aids................................................................................................................................................. 53
Test Description ............................................................................................................... ................................53
Diagnostic Table............................................................................................................... ................................54
Drive Belt Squeal .............................................................................................................. ...................................55
Definition ..................................................................................................................... .....................................55
Diagnostic Aids................................................................................................................................................. 55
Test Description ............................................................................................................... ................................55
Diagnostic Table............................................................................................................... ................................55
Drive Belt Whine .................................................................................................................................................. 57
Definition ..................................................................................................................... .....................................57
Diagnostic Aids................................................................................................................................................. 57
Test Description ............................................................................................................... ................................57
Diagnostic Table............................................................................................................... ................................57
Drive Belt Rumble .............................................................................................................. ..................................58
Definition ..................................................................................................................... .....................................58
Diagnostic Aids................................................................................................................................................. 58
Test Description ............................................................................................................... ................................58
Diagnostic Table............................................................................................................... ................................58
Drive Belt Vibration........................................................................................................... ...................................60
Definition ..................................................................................................................... .....................................60
Diagnostic Aids................................................................................................................................................. 60
Test Description ............................................................................................................... ................................60
Diagnostic Table............................................................................................................... ................................60
Drive Belt Falls Off ........................................................................................................... ....................................62
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Page 2780 of 6020

Engine Mechanical – V6 Page 6A1–3
Page 6A1–3
Definition ..................................................................................................................... .....................................62
Diagnostic Aids................................................................................................................................................. 62
Test Description ............................................................................................................... ................................62
Diagnostic Table............................................................................................................... ................................62
Drive Belt Excessive Wear ...................................................................................................... ............................64
Definition ..................................................................................................................... .....................................64
Diagnostic Aids................................................................................................................................................. 64
Test Description ............................................................................................................... ................................64
Diagnostic Table............................................................................................................... ................................64
Accessory Drive Belt Tensioner Diagnosis ....................................................................................... ................65
Diagnostic Table............................................................................................................... ................................65
3 Minor Service Operations ....................................................................................................... .............66
3.1 Engine Oil ..................................................................................................................... ........................................66
Check.................................................................................................................................................................... 66
Replace ........................................................................................................................ .........................................67
Pressure Check ................................................................................................................. ...................................68
3.2 Oil Filter Cartridge ........................................................................................................... ....................................69
Replace ........................................................................................................................ .........................................69
3.3 Oil Filter Adaptor............................................................................................................. .....................................70
Remove ................................................................................................................................................................. 70
Reinstall ................................................................................................................................................................ 70
3.4 Oil Level Indicator Tube ...................................................................................................................................... 71
Remove ................................................................................................................................................................. 71
Reinstall ................................................................................................................................................................ 71
3.5 Accessory Drive Belt ........................................................................................................................................... 72
RWD Vehicle ......................................................................................................................................................... 72
Remove ............................................................................................................................................................72
Reinstall ...................................................................................................................... .....................................73
3.6 Accessory Drive Belt Idler Pulley .............................................................................................. .........................74
Remove ................................................................................................................................................................. 74
Reinstall ................................................................................................................................................................ 74
3.7 Accessory Drive Belt Tensioner Assembly ........................................................................................ ...............75
Remove ................................................................................................................................................................. 75
Reinstall ................................................................................................................................................................ 75
3.8 Power Steering Pump Bracket .................................................................................................... ........................76
Remove ................................................................................................................................................................. 76
Reinstall ................................................................................................................................................................ 76
3.9 Upper Intake Manifold .......................................................................................................... ...............................77
Remove ................................................................................................................................................................. 77
Disassemble ......................................................................................................................................................... 80
Clean..................................................................................................................................................................... 80
Inspect ........................................................................................................................ ..........................................81
Reassemble .......................................................................................................................................................... 81
Reinstall ................................................................................................................................................................ 82
3.10 Intake Manifold Assembly – Complete............................................................................................ ...................83
Remove ................................................................................................................................................................. 83
Disassemble ......................................................................................................................................................... 87
Clean..................................................................................................................................................................... 88
Inspect ........................................................................................................................ ..........................................88
Reassemble .......................................................................................................................................................... 89
Reinstall ................................................................................................................................................................ 89
3.11 Exhaust Manifold Assembly ...................................................................................................... .........................91
Remove ................................................................................................................................................................. 91
Inspect ........................................................................................................................ ..........................................93
Reinstall ................................................................................................................................................................ 93
3.12 Camshaft Cover ................................................................................................................. ..................................94
Remove ................................................................................................................................................................. 94
Clean and Inspect .............................................................................................................. ..................................96
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Page 2781 of 6020

Engine Mechanical – V6 Page 6A1–4
Page 6A1–4
Reinstall ................................................................................................................................................................ 97
3.13 Crankshaft Balancer Assembly ................................................................................................... .....................100
Remove ............................................................................................................................................................... 100
Clean and Inspect .............................................................................................................. ................................101
Reinstall .............................................................................................................................................................. 101
3.14 Crankshaft Front Seal.......................................................................................................... ..............................103
Replace ........................................................................................................................ .......................................103
3.15 Front Cover Assembly........................................................................................................... ............................104
Remove ............................................................................................................................................................... 104
Disassemble ....................................................................................................................................................... 105
Clean................................................................................................................................................................... 106
Inspect ........................................................................................................................ ........................................107
Reassemble ........................................................................................................................................................ 107
Reinstall .............................................................................................................................................................. 108
3.16 Timing Chains, Tensioners, Shoes and Guides .................................................................................... ..........110
Primary and Left-hand Secondary Timing Chain Installation ...................................................................... ..110
Excluding MY 06 Update .......................................................................................................... .......................110
MY06 Update .................................................................................................................... .............................111
Right-hand Secondary Timi ng Chain Installation ........................................................................................... 112
Excluding MY06 Update .......................................................................................................... .......................112
MY06 Update .................................................................................................................... .............................113
Remove ............................................................................................................................................................... 114
Right-hand Secondary Timing Chain.............................................................................................. ................114
Primary Timi ng Chain ........................................................................................................... ..........................118
Left-hand Secondary Timing C hain ............................................................................................... .................120
Clean................................................................................................................................................................... 123
Inspect ........................................................................................................................ ........................................124
Timing Chains .................................................................................................................. ..............................124
Camshaft Intermedi ate Sprockets .................................................................................................................. 124
Inlet and Exhaust Camshaft Sprocket ............................................................................................ ................124
Crankshaft Sprocket ....................................................................................................................................... 125
Primary Timing Chain Upper Guide............................................................................................... .................125
Primary Timing C hain Lower Guide............................................................................................... .................125
Primary Timing C hain Tensioner ................................................................................................. ...................126
Left-hand Secondary Ti ming Chain Guide ......................................................................................... ............126
Left-hand Secondary Ti ming Chain Shoe.......................................................................................... .............127
Left-hand Secondary Timi ng Chain Tensioner ..................................................................................... ..........127
Right-hand Sec ondary Timing Chain Guide ................................................................................................... 128
Right-hand Secondary Timing Chain Shoe ......................................................................................... ...........128
Right-hand Se condary Timing Chain Tensioner .................................................................................... .........129
Reinst all .............................................................................................................................................................. 130
Left-hand Secondary Timing Chain Components – Excluding MY06 Update ................................................ 130
Left-hand Secondary Timing Chain Components – MY06 Update ................................................................. 139
Primary Timing Chain Components – Excluding MY06 Update ..................................................................... 149
Primary Timing Chain Components – MY06 Update .................................................................................. ....156
Right-hand Secondary Timing Chain Components – Excluding MY06 Update .............................................. 164
Right-hand Secondary Timing Chain Components – MY06 Update............................................................... 171
3.17 Oil Pump Assembly .............................................................................................................. .............................180
Remove ............................................................................................................................................................... 180
Disassemble ....................................................................................................................................................... 181
Clean................................................................................................................................................................... 182
Inspect ........................................................................................................................ ........................................183
Reassemble ........................................................................................................................................................ 185
Reinstall .............................................................................................................................................................. 185
3.18 Camshaft Sprocket – Excluding MY06 Update ................................................................................................ 186
Remove ............................................................................................................................................................... 186
Right-hand Side................................................................................................................ ..............................186
Left-hand Side ................................................................................................................................................ 189
Clean................................................................................................................................................................... 191
Inspect ........................................................................................................................ ........................................191
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Engine Mechanical – V6 Page 6A1–5
Page 6A1–5
Reinstall .............................................................................................................................................................. 192
3.19 Camshaft Sprocket – MY06 Update ................................................................................................ ..................193
Remove ............................................................................................................................................................... 193
Right-hand Side................................................................................................................ ..............................193
Left-hand Side ................................................................................................................................................ 196
Clean................................................................................................................................................................... 199
Inspect ........................................................................................................................ ........................................199
Reinstall .............................................................................................................................................................. 200
3.20 Camshaft ............................................................................................................................................................ 201
Remove ............................................................................................................................................................... 201
Right-hand Side................................................................................................................ ..............................201
Left-hand Side ................................................................................................................................................ 203
Clean................................................................................................................................................................... 204
Inspect ........................................................................................................................ ........................................205
Camshaft Visual Inspection ..................................................................................................... .......................205
Camshaft Meas urement ................................................................................................................................. 205
Reinstall .............................................................................................................................................................. 207
Right-hand Side................................................................................................................ ..............................207
Left-hand Side ................................................................................................................................................ 210
3.21 Rocker Arm......................................................................................................................................................... 213
Remove ............................................................................................................................................................... 213
Clean and Inspect .............................................................................................................. ................................213
Reinstall .............................................................................................................................................................. 214
3.22 Stationary Hydraulic Lash Adjuster ............................................................................................. ....................215
Remove ............................................................................................................................................................... 215
Clean and Inspect .............................................................................................................. ................................215
Reinstall .............................................................................................................................................................. 216
3.23 Cylinder Head Assembly ......................................................................................................... ..........................217
Remove ............................................................................................................................................................... 217
Right-hand Side (Bank 1) Cylinder Head ......................................................................................... ..............217
Left-hand Side (Bank 2) Cylinder Head .......................................................................................... ................218
Disassemble ....................................................................................................................................................... 219
Clean................................................................................................................................................................... 222
Inspect ........................................................................................................................ ........................................222
Visual Inspection .............................................................................................................. ..............................222
Cylinder Head Measurement.......................................................................................................................... 223
Valve Spring Inspection and Measurement ........................................................................................ ............225
Valve and Seat Grinding ........................................................................................................ ........................225
Assemble ....................................................................................................................... .....................................230
Reinstall .............................................................................................................................................................. 233
Right-hand Side (Bank 1) Cylinder Head ......................................................................................... ..............233
Left-hand Side (Bank 2) Cylinder Head .......................................................................................... ................234
3.24 Engine Mounts and Brackets ..................................................................................................... .......................236
Remove ............................................................................................................................................................... 236
Engine Mount Location ..................................................................................................................................... 237
Inspect ........................................................................................................................ ........................................237
Reinstall .............................................................................................................................................................. 238
4 Major Service Operations ....................................................................................................... ...........239
4.1 Engine Re moval ................................................................................................................. ................................239
Remove ............................................................................................................................................................... 240
Disassemble ....................................................................................................................................................... 252
Reassemble ........................................................................................................................................................ 253
Reinstall .............................................................................................................................................................. 253
4.2 Oil Pan and Oil Pump Suction Pipe Assembly ..................................................................................... ...........254
Remove ............................................................................................................................................................... 254
Disassemble ....................................................................................................................................................... 255
Clean................................................................................................................................................................... 255
Inspect ........................................................................................................................ ........................................256
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Page 2783 of 6020

Engine Mechanical – V6 Page 6A1–6
Page 6A1–6
Reassemble ........................................................................................................................................................ 257
Reinstall .............................................................................................................................................................. 257
4.3 Flexplate Assembly ............................................................................................................. ..............................259
Remove ............................................................................................................................................................... 259
Clean................................................................................................................................................................... 259
Inspect ........................................................................................................................ ........................................260
Reinstall .............................................................................................................................................................. 260
4.4 Crankshaft Rear Seal and Plate Assembly ........................................................................................ ..............262
Remove ............................................................................................................................................................... 262
Reinstall .............................................................................................................................................................. 263
4.5 Pistons, Pins, Rings, Connecting Rods and Big-end Bearings ..................................................................... 265
Remove ............................................................................................................................................................... 265
Disassemble ....................................................................................................................................................... 268
Clean and Inspect .............................................................................................................. ................................269
Piston Cleaning Procedure...................................................................................................... .......................269
Piston Inspection Procedure .................................................................................................... ......................269
Piston Measurement ............................................................................................................. .........................270
Piston Ring Measurement ........................................................................................................ ......................271
Connecting Rod Cleaning Procedure .............................................................................................. ...............272
Connecting Rod Visual Inspection Procedure ..................................................................................... ...........272
Connecting Rod Meas urement Procedure ........................................................................................... ..........272
Reasse mble ........................................................................................................................................................ 274
Piston and Piston Pin ..................................................................................................................................... 274
Piston Ring .................................................................................................................... .................................275
Connecting Rod Bearing ................................................................................................................................ 276
Reinstall .............................................................................................................................................................. 277
Piston Connecting Rod and Connecting Rod Bearing Inst allation .................................................................. 277
Connecting Rod Bearing Clearance Measurement Procedure....................................................................... 278
Connecting Rod Final Assembly Procedure ........................................................................................ ...........279
4.6 Crankshaft and Ma in Bearings ................................................................................................... ......................281
Crankshaft End Play Measurement ................................................................................................ ..................281
Remove ............................................................................................................................................................... 281
Crankshaft Bearing............................................................................................................. ............................283
Clean and Inspect .............................................................................................................. ................................283
Crankshaft and Main Bearing Cleaning ........................................................................................... ...............283
Crankshaft and Main Bear ing Visual Inspection .................................................................................. ...........284
Crankshaft Main B earing Inspection............................................................................................. ..................285
Crankshaft M easurement ......................................................................................................... ......................286
Reinstall .............................................................................................................................................................. 288
Crankshaft Bearing Installation Procedure ...................................................................................... ...............288
Crankshaft Main Bearing Clearance Measurement .................................................................................. ......289
Crankshaft Final Instal lation Procedure........................................................................................ ..................291
4.7 Cylinder Block ................................................................................................................. ...................................293
Disassemble ....................................................................................................................................................... 293
Clean................................................................................................................................................................... 297
Inspect ........................................................................................................................ ........................................297
Visual Inspection .............................................................................................................. ..............................297
Measuring Cylinder Bore Diameter ............................................................................................... .................297
Measuring Cylinder Bore Taper.................................................................................................. ....................298
Measuring Cylinder Bo re Out-of-Round ........................................................................................... ..............298
Deck Flatness Inspection ............................................................................................................................... 298
Reassemble ........................................................................................................................................................ 299
4.8 Thread Repairs ................................................................................................................................................... 303
General Information ............................................................................................................ ...............................303
General Thread Repair .......................................................................................................... ............................304
Main Bearing Cap Bolt Hole Thread Repair ....................................................................................... ..............310
Cylinder Head Bolt Hole Thread Repair .......................................................................................... .................315
4.9 Thread Repair Specifications................................................................................................... .........................322
Left-hand Cylinder Head Camshaft Cover Face .................................................................................... ..........322
Left-hand Cylinder H ead Front Face ............................................................................................. ...................323
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Page 2784 of 6020

Engine Mechanical – V6 Page 6A1–7
Page 6A1–7
Left-hand Cylinder Head Intake Face ............................................................................................ ...................324
Left-hand Cylinder H ead Exhaust Face ........................................................................................... ................325
Left-hand Cylinder H ead Rear Face .............................................................................................. ...................326
Right-hand Cylinder Head Camshaft Cover Face ................................................................................... ........327
Right-hand Cylinder Head Front Face............................................................................................ ..................328
Right-hand Cylinder Head Intake Face ........................................................................................... .................329
Right-hand Cylinder He ad Exhaust Face .......................................................................................... ...............330
Right-hand Cylinder Head Rear Face ............................................................................................. ..................331
Engine Block Front ............................................................................................................................................ 332
Engine Block Left-hand Side .................................................................................................... ........................333
Engine Block Ri ght-hand Side ................................................................................................... .......................334
Engine Block Rear .............................................................................................................. ...............................335
Engine Block Bottom......................................................................................................................................... 336
Engine Block Left-hand Deck Face ............................................................................................... ...................337
Engine Block Righ t-hand Deck Face.............................................................................................. ..................338
Engine Front Cover............................................................................................................. ...............................339
Upper Intake Manifold Top ...................................................................................................... ..........................340
Upper Intake Mani fold Front .................................................................................................... .........................341
Upper Intake Ma nifold Rear..................................................................................................... ..........................342
Lower Intake Ma nifold Top...................................................................................................... ..........................343
Oil Pan Front .................................................................................................................. ....................................344
Oil Pan Rear........................................................................................................................................................ 345
Oil Pan Bottom ................................................................................................................................................... 346
5 Specifications .....................................................................................................................................347
6 Torque Wrench Specifications................................................................................................... .......351
7 Special Tools .................................................................................................................. ....................353
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