2005 INFINITI FX35 Belts

EM-1
ENGINE MECHANICAL
B ENGINE
CONTENTS
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Revision: 2005 July 2005 FX
ENGINE MECHANICAL
VQ35DE
PRECAUTIONS .......................................................... 5
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect ..................................... ..... 5
OPERATION PROCEDURE ............................ ..... 5
Precautions for Drain Engine Coolant and Engine
Oil ........................................................................ ..... 5
Precautions for Disconnecting Fuel Piping ......... ..... 5
Precautions for Removal and Disassembly ........ ..... 5
Precautions for Inspection, Repair and Replace-
ment .................................................................... ..... 5
Precautions for Assembly and Installation .......... ..... 6
Precautions for Angle Tightening ........................ ..... 6
Precautions for Liquid Gasket ............................. ..... 6
REMOVAL OF LIQUID GASKET SEALING ..... ..... 6
LIQUID GASKET APPLICATION PROCEDURE ..... 6
PREPARATION ...................................................... ..... 8
Special Service Tools .......................................... ..... 8
Commercial Service Tools ................................... ... 10
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ... 13
NVH Troubleshooting — Engine Noise ............... ... 13
Use the Chart Below to Help You Find the Cause
of the Symptom. .................................................. ... 14
DRIVE BELTS ........................................................ ... 15
Checking Drive Belts ........................................... ... 15
Tension Adjustment ............................................. ... 15
ALTERNATOR AND POWER STEERING OIL
PUMP BELT ..................................................... ... 16
A/C COMPRESSOR BELT .............................. ... 16
Removal and Installation ..................................... ... 16
REMOVAL ........................................................ ... 16
INSTALLATION ................................................ ... 16
AIR CLEANER AND AIR DUCT ............................ ... 17
Components ........................................................ ... 17
Removal and Installation ..................................... ... 17
REMOVAL ........................................................ ... 17
INSPECTION AFTER REMOVAL .................... ... 17 INSTALLATION ................................................
... 18
Changing Air Cleaner Filter ................................. ... 18
INSPECTION ................................................... ... 18
REMOVAL ........................................................ ... 18
INSTALLATION ................................................ ... 18
INTAKE MANIFOLD COLLECTOR ....................... ... 19
Components ........................................................ ... 19
Removal and Installation ..................................... ... 19
REMOVAL ........................................................ ... 19
INSPECTION AFTER REMOVAL .................... ... 21
INSTALLATION ................................................ ... 22
INTAKE MANIFOLD .............................................. ... 24
Components ........................................................ ... 24
Removal and Installation ..................................... ... 24
REMOVAL ........................................................ ... 24
INSPECTION AFTER REMOVAL .................... ... 25
INSTALLATION ................................................ ... 25
EXHAUST MANIFOLD AND THREE WAY CATA-
LYST ....................................................................... ... 26
Components ........................................................ ... 26
Removal and Installation ..................................... ... 26
REMOVAL ........................................................ ... 26
INSPECTION AFTER REMOVAL .................... ... 28
INSTALLATION ................................................ ... 28
OIL PAN AND OIL STRAINER .............................. ... 30
Components (2WD Model) .................................. ... 30
Removal and Installation (2WD Model) ............... ... 30
REMOVAL ........................................................ ... 30
INSPECTION AFTER REMOVAL .................... ... 32
INSTALLATION ................................................ ... 32
INSPECTION AFTER INSTALLATION ............. ... 35
Components (AWD Model) .................................. ... 35
Removal and Installation (AWD Model) ............... ... 36
REMOVAL ........................................................ ... 36
INSPECTION AFTER REMOVAL .................... ... 38
INSTALLATION ................................................ ... 38
INSPECTION AFTER INSTALLATION ............. ... 41

EM-3
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Revision: 2005 July 2005 FX
ANCE ...............................................................
. 146
MAIN BEARING OIL CLEARANCE ................. . 147
MAIN BEARING CRUSH HEIGHT ................... . 148
CONNECTING ROD BEARING CRUSH
HEIGHT ............................................................ . 148
MAIN BEARING CAP BOLT OUTER DIAMETER . 148
CONNECTING ROD BOLT OUTER DIAMETER . 149
DRIVE PLATE .................................................. . 149
OIL JET ............................................................ . 149
OIL JET RELIEF VALVE .................................. . 149
SERVICE DATA AND SPECIFICATIONS (SDS) ... . 150
Standard and Limit .............................................. . 150
GENERAL SPECIFICATIONS ......................... . 150
DRIVE BELT .................................................... . 151
INTAKE MANIFOLD COLLECTOR, INTAKE
MANIFOLD AND EXHAUST MANIFOLD ........ . 151
SPARK PLUG .................................................. . 151
CAMSHAFT AND CAMSHAFT BEARING ....... . 152
CYLINDER HEAD ............................................ . 154
CYLINDER BLOCK .......................................... . 157
PISTON, PISTON RING AND PISTON PIN ..... . 158
CONNECTING ROD ........................................ . 159
CRANKSHAFT ................................................. . 160
MAIN BEARING ............................................... . 161
CONNECTING ROD BEARING ....................... . 162
VK45DE
PRECAUTIONS ..................................................... . 163
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect ..................................... . 163
OPERATION PROCEDURE ............................ . 163
Precautions for Drain Engine Coolant and Engine
Oil ........................................................................ . 163
Precautions for Disconnecting Fuel Piping ......... . 163
Precautions for Removal and Disassembly ........ . 163
Precautions for Inspection, Repair and Replace-
ment .................................................................... . 163
Precautions for Assembly and Installation .......... . 163
Parts Requiring Angle Tightening ........................ . 164
Precautions for Liquid Gasket ............................. . 164
REMOVAL OF LIQUID GASKET SEALING ..... . 164
LIQUID GASKET APPLICATION PROCEDURE . 164
PREPARATION ...................................................... . 166
Special Service Tools .......................................... . 166
Commercial Service Tools ................................... . 168
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... . 170
NVH Troubleshooting — Engine Noise ............... . 170
Use the Chart Below to Help You Find the Cause
of the Symptom. .................................................. . 171
ENGINE ROOM COVER ....................................... . 172
Components ........................................................ . 172
Removal and Installation ..................................... . 172
REMOVAL ........................................................ . 172
INSTALLATION ................................................ . 172
DRIVE BELTS ........................................................ . 173
Components ........................................................ . 173 Checking Drive Belts ...........................................
.173
Tension Adjustment ............................................. .173
Removal and Installation ..................................... .173
REMOVAL ........................................................ .173
INSTALLATION ................................................ .174
Components ........................................................ .175
Drive Belt Auto Tensioner and Idler Pulley .......... .175
REMOVAL ........................................................ .175
INSTALLATION ................................................ .175
AIR CLEANER AND AIR DUCT ............................ .176
Components ........................................................ .176
Removal and Installation ..................................... .176
REMOVAL ........................................................ .176
INSPECTION AFTER REMOVAL .................... .177
INSTALLATION ................................................ .177
Changing Air Cleaner Filter ................................. .177
REMOVAL ........................................................ .177
INSTALLATION ................................................ .177
INTAKE MANIFOLD .............................................. .178
Components ........................................................ .178
Removal and Installation ..................................... .179
REMOVAL ........................................................ .179
INSPECTION AFTER REMOVAL .................... .180
INSTALLATION ................................................ .180
INSPECTION AFTER INSTALLATION ............. .181
EXHAUST MANIFOLD AND THREE WAY CATA-
LYST ....................................................................... .182
Components ........................................................ .182
Removal and Installation ..................................... .182
REMOVAL ........................................................ .182
INSPECTION AFTER REMOVAL .................... .184
INSTALLATION ................................................ .184
OIL PAN AND OIL STRAINER .............................. .185
Components ........................................................ .185
Removal and Installation ..................................... .185
REMOVAL ........................................................ .185
INSPECTION AFTER REMOVAL .................... .187
INSTALLATION ................................................ .187
INSPECTION AFTER INSTALLATION ............. .188
IGNITION COIL ...................................................... .189
Components ........................................................ .189
Removal and Installation ..................................... .189
REMOVAL ........................................................ .189
INSTALLATION ................................................ .189
SPARK PLUG (PLATINUM-TIPPED TYPE) .......... .190
Components ........................................................ .190
Removal and Installation ..................................... .190
REMOVAL ........................................................ .190
INSPECTION AFTER REMOVAL .................... .190
INSTALLATION ................................................ .191
FUEL INJECTOR AND FUEL TUBE ..................... .192
Components ........................................................ .192
Removal and Installation ..................................... .192
REMOVAL ........................................................ .192
INSTALLATION ................................................ .194
INSPECTION AFTER INSTALLATION ............. .196

EM-4Revision: 2005 July 2005 FX
ROCKER COVER ..................................................
.197
Components ........................................................ .197
Removal and Installation ..................................... .197
REMOVAL ........................................................ .197
INSTALLATION ................................................. .199
TIMING CHAIN ....................................................... .200
Components ........................................................ .200
Removal and Installation ..................................... .201
REMOVAL ........................................................ .201
INSPECTION AFTER REMOVAL ..................... .205
INSTALLATION ................................................. .205
INSPECTION AFTER INSTALLATION ............. .211
CAMSHAFT ............................................................ .212
Components ........................................................ .212
Removal and Installation ..................................... .212
REMOVAL ........................................................ .212
INSPECTION AFTER REMOVAL ..................... .213
INSTALLATION ................................................. .216
INSPECTION AFTER INSTALLATION ............. .218
Valve Clearance ................................................... .219
INSPECTION .................................................... .219
ADJUSTMENT ................................................. .222
OIL SEAL ............................................................... .225
Removal and Installation of Valve Oil Seal .......... .225
REMOVAL ........................................................ .225
INSTALLATION ................................................. .225
Removal and Installation of Front Oil Seal .......... .226
REMOVAL ........................................................ .226
INSTALLATION ................................................. .226
Removal and Installation of Rear Oil Seal ........... .227
REMOVAL ........................................................ .227
INSTALLATION ................................................. .227
CYLINDER HEAD .................................................. .229
On-Vehicle Service .............................................. .229
CHECKING COMPRESSION PRESSURE ...... .229
Components ........................................................ .230
Removal and Installation ..................................... .230
REMOVAL ........................................................ .230
INSPECTION AFTER REMOVAL ..................... .231
INSTALLATION ................................................. .231
Disassembly and Assembly ................................. .233
COMPONENTS ................................................ .233
DISASSEMBLY ................................................ .233
ASSEMBLY ...................................................... .234
Inspection After Disassembly .............................. .235
VALVE DIMENSIONS ....................................... .235
VALVE GUIDE CLEARANCE ........................... .236
VALVE GUIDE REPLACEMENT ...................... .236
VALVE SEAT CONTACT .................................. .238
VALVE SEAT REPLACEMENT ........................ .238
VALVE SPRING SQUARENESS ...................... .239
VALVE SPRING DIMENSIONS AND VALVE
SPRING PRESSURE LOAD ............................ .239 ENGINE ASSEMBLY ..............................................
.240
Components ......................................................... .240
Removal and Installation ...................................... .240
REMOVAL ......................................................... .240
INSTALLATION ................................................. .243
INSPECTION AFTER INSTALLATION ............. .243
CYLINDER BLOCK ................................................ .245
Components ......................................................... .245
Disassembly and Assembly ................................. .246
DISASSEMBLY ................................................. .246
ASSEMBLY ....................................................... .249
How to Select Piston and Bearing ....................... .255
DESCRIPTION ................................................. .255
HOW TO SELECT PISTON .............................. .255
HOW TO SELECT CONNECTING ROD BEAR-
ING .................................................................... .256
HOW TO SELECT MAIN BEARING ................. .257
Inspection After Disassembly ............................... .262
CRANKSHAFT END PLAY ............................... .262
CONNECTING ROD SIDE CLEARANCE ........ .262
PISTON TO PISTON PIN OIL CLEARANCE .... .262
PISTON RING SIDE CLEARANCE .................. .263
PISTON RING END GAP ................................. .263
CONNECTING ROD BEND AND TORSION .... .264
CONNECTING ROD BIG END DIAMETER ..... .264
CONNECTING ROD BUSHING OIL CLEAR-
ANCE ................................................................ .264
CYLINDER BLOCK DISTORTION ................... .265
MAIN BEARING HOUSING INNER DIAMETER .266
PISTON TO CYLINDER BORE CLEARANCE . .266
CRANKSHAFT MAIN JOURNAL DIAMETER .. .267
CRANKSHAFT PIN JOURNAL DIAMETER ..... .268
CRANKSHAFT OUT-OF-ROUND AND TAPER .268
CRANKSHAFT RUNOUT ................................. .268
CONNECTING ROD BEARING OIL CLEAR-
ANCE ................................................................ .269
MAIN BEARING OIL CLEARANCE .................. .270
CRUSH HEIGHT OF MAIN BEARING ............. .271
CRUSH HEIGHT OF CONNECTING ROD
BEARING .......................................................... .271
DRIVE PLATE ................................................... .271
SERVICE DATA AND SPECIFICATIONS (SDS) ... .272
Standard and Limit ............................................... .272
GENERAL SPECIFICATIONS .......................... .272
DRIVE BELTS ................................................... .272
INTAKE MANIFOLD AND EXHAUST MANI-
FOLD ................................................................ .272
SPARK PLUG ................................................... .273
CAMSHAFT AND CAMSHAFT BEARING ........ .273
CYLINDER HEAD ............................................. .275
CYLINDER BLOCK ........................................... .278
PISTON, PISTON RING AND PISTON PIN ..... .279
CONNECTING ROD ......................................... .280
CRANKSHAFT .................................................. .281
MAIN BEARING ................................................ .283
CONNECTING ROD BEARING ........................ .284

EM-14
[VQ35DE]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: 2005 July 2005 FX
Use the Chart Below to Help You Find the Cause of the Symptom.ABS004TW
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of the engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
A: Closely related B: Related C: Sometimes related —: Not related Location
of noise Type of
noise Operating condition of engine
Source of noise Check item Refer-
ence page
Before
warm- up After
warm- up When
start- ing When
idling When
racing While
driving
Top of
engine
Rocker
cover
Cylinder
head Ticking or
clicking CA—AB— Tappet
noise Valve clearance
EM-93
Rattle C A — A B C Camshaft
bearing
noise Camshaft runout
Camshaft journal oil
clearance EM-86EM-86
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil pan Slap or
knock —A—B B— Piston pin
noise Piston to piston pin oil
clearance
Connecting rod bush-
ing oil clearance EM-140
EM-142
Slap or
rap A——B B A Piston
slap noise Piston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion EM-144EM-141
EM-141
EM-142
Knock A B C B B B
Connect-
ing rod
bearing
noise Connecting rod bush-
ing oil clearance
Connecting rod bear-
ing oil clearance EM-142EM-146
Knock A B — A B C
Main
bearing
noise Main bearing oil clear-
ance
Crankshaft runout EM-147
EM-146
Front of
engine
Timing
chain
case Tapping or
ticking AA—BBB Timing
chain and
timing
chain ten-
sioner
noise Timing chain cracks
and wear
Timing chain tensioner
operation EM-72
EM-64
Front of
engine Squeak-
ing or fizz-
ing AB—B—C Drive belts
(Sticking
or slip-
ping) Drive belts deflection
EM-15
CreakingABABAB Drive belts
(Slipping) Idler pulley bearing
operation
Squall
Creak AB—BAB Water
pump
noise Water pump operation CO-22,
"WATER
PUMP"

DRIVE BELTS EM-15
[VQ35DE]
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Revision: 2005 July 2005 FX
DRIVE BELTSPFP:02117
Checking Drive BeltsABS004TX
WARNING:
Be sure to perform when engine is stopped.
1. Inspect belts for cracks, fraying, wear and oil. If necessary, replace.
2. Inspect drive belt deflection or tension at a point on belt midway between pulleys.

Inspection should be done only when engine is cold, or over
30 minutes after engine is stopped.

Measure the belt tension with belt tension gauge (Commercial
service tool: BT3373-F or equivalent) at points marked
shown in the figure.

When measuring the deflection, apply 98 N (10 kg, 22 lb) at
the marked point.

Adjust if the belt deflection exceeds the limit or if the belt ten-
sion is not within specifications.
CAUTION:

When checking the belt deflection or the tension immediately after installation, first adjust it to
the specified value. Then, after turning crankshaft two turns or more, re-adjust to the specified
value to avoid variation in deflection between pulleys.

Tighten idler pulley lock nut by hand and measure the deflection or the tension without loose-
ness.
Belt Deflection and Tension
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at different location on belt.
Tension AdjustmentABS004TY
CAUTION:

When belt is replaced with a new one, adjust it to value for “New belt” to accommodate for insuffi-
cient adaptability with pulley grooves.

When deflection or tension of belt being used exceeds “Limit”, adjust it to value for “After adjust-
ment”.

When checking belt deflection or tension immediately after installation, first adjust it to the speci-
fied value. Then, after turning crankshaft two turns or more, re-adjust to the specified value to
avoid variation in deflection between pulleys.

When installing belt, make sure that it is correctly engaged with pulley grooves.

Keep engine oil, working fluid and engine coolant away from belt and pulley grooves.

Do not twist or bend belt excessively.
KBIA1731J
Items Deflection adjustment Unit: mm (in) Tension adjustment* Unit: N (kg, lb)
Used belt New belt Used belt
New belt
Limit After adjustment Limit After adjustment
Alternator and
power steering
oil pump belt 7 (0.28)
4 - 5
(0.16 - 0.20) 3.5 - 4.5
(0.138 - 0.177) 294 (30, 66) 730 - 818
(74.5 - 83.4, 164 - 184) 838 - 926
(85.5 - 94.5, 188 - 208)
A/C compressor
belt 12 (0.47) 9 - 10
(0.35 - 0.39) 8 - 9
(0.31 - 0.35) 196 (20, 44) 348 - 436
(35.5 - 44.5, 78 - 98) 470 - 559
(47.9 - 57.0, 106 - 126)
Applied pushing
force 98 N (10 kg, 22 lb) —
Portion
Belt tightening method for adjustment
Alternator and power steering oil pump belt Adjusting bolt on idler pulley
A/C compressor belt Adjusting bolt on idler pulley

EM-16
[VQ35DE]
DRIVE BELTS
Revision: 2005 July 2005 FX
ALTERNATOR AND POWER STEERING OIL PUMP BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (A) and adjust tension by turning adjusting bolt (B).

For the specified belt tension, refer to EM-15, "Checking Drive
Belts" .
3. Tighten nut (A).
A/C COMPRESSOR BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (C) and adjust tension by turning adjusting bolt (D).

For the specified belt tension, refer to EM-15, "Checking Drive Belts" .
3. Tighten nut (C).
Removal and InstallationABS004TZ
REMOVAL
1. Remove front engine undercover with power tool.
2. Remove alternator and power steering oil pump belt. Refer to EM-16, "
ALTERNATOR AND POWER
STEERING OIL PUMP BELT" .
3. Remove A/C compressor belt. Refer to EM-16, "
A/C COMPRESSOR BELT" .
CAUTION:
Grease is applied to idler pulley adjusting bolt. Be careful to keep grease away from belt.
INSTALLATION
1. Install belts to pulley in reverse order of removal.
CAUTION:

Make sure drive belt is correctly engaged with pulley groove.

Make sure that for engine oil and engine coolant do not adhere to belt and each pulley grooves.
2. Adjust belt tension. Refer to EM-15, "
Tension Adjustment" .
3. Tighten each adjusting bolt and nut to the specified torque.
4. Make sure that tension of each belt is within the standard. Refer to EM-15, "
Checking Drive Belts" .
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
SBIA0532E
: 34.8 N·m (3.5 kg-m, 26 ft-lb)

EM-20
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Revision: 2005 July 2005 FX
1. Remove engine cover with power tool.
2. Disconnect water hoses from intake manifold collector (upper), attach blind plug to prevent engine coolant leakage.
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air cleaner case and air duct. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Remove electric throttle control actuator as the following:
a. Disconnect harness connector.
b. Loosen mounting bolts in reverse order as shown in the figure. CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.
5. Remove fuel sub-tube mounting bolt to disconnect from rear of intake manifold collector (lower). Refer to EM-45, "
FUEL INJECTOR AND FUEL TUBE" .
6. Disconnect vacuum hose and water hose from intake manifold collector (upper).
7. Remove EVAP canister purge volume control solenoid valve bracket mounting bolt from intake manifold collector (upper).
SBIA0486E
KBIA0957E

EM-26
[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2005 July 2005 FX
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
ComponentsABS00E5Y
Removal and InstallationABS004U4
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.
1. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
2. Drain engine coolant. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air cleaner case and air duct. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Remove front and rear engine undercover and front cross bar with power tool.
5. Disconnect heated oxygen sensors 2 (bank 1 and bank 2) harness connectors.
1. Heated oxygen sensor 2 (bank 1) 2. Three way catalyst (right bank) 3. Gasket
4. Air fuel ratio sensor 1 (bank 1) 5. Exhaust manifold cover (right bank) 6. Exhaust manifold (right bank)
7. Exhaust manifold (left bank) 8. Exhaust manifold cover (left bank) 9. Three way catalyst (left bank)
10. Air fuel ratio sensor 1 (bank 2) 11. Heated oxygen sensor 2 (bank 2)
PBIC3103E