2008 INFINITI FX35 service

EM-230
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
 Refer to
GI-8, "Component" for symbols in the figure.
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.
 Identify installation positions, and store them without mixing them up.
3. Remove valve collet.  Compress valve spring with valve spring compressor, attach-ment and adapter (SST). Remove valve collet with magnetic
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring (with valve spring seat). CAUTION:
Do not remove valve spring seat from valve spring.
5. Push valve stem to combustion chamber side, and remove valve.  Identify installation positions, and store them without mixing them up.
PBIC5277E
1. Spark plug 2. Valve lifter 3. Valve collet
4. Valve spring retainer 5. Valve spring (with valve spring seat) 6. Valve oil seal
7. Valve guide 8. Cylinder head (right bank) 9. Valve seat
10. Valve (INT) 11. Valve (EXH) 12. Cylinder head (left bank)
13. Spark plug tube
: Apply genuine High Strength Lock-
ing Sealant or equivalent
PBIC2360E
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CYLINDER HEADEM-231
< SERVICE INFORMATION > [VK45DE]
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6. Remove valve oil seal with valve oil seal puller (SST).
7. If valve seat must be replaced, refer to
EM-232, "
Inspection After Disassembly".
8. If valve guide must be replaced, refer to EM-232, "
Inspection After Disassembly".
9. Remove spark plug tube, as necessary.  Using pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:
 Take care not to damage cylinder head.
 Once removed, spark plug tube will be deforme d and cannot be reused. Do not remove it unless
absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-232, "Inspection After Disassembly".
2. When valve seat is removed, install it. Refer to EM-232, "
Inspection After Disassembly".
3. Install new valve oil seal as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with valve oil seal drift (SST) to match dimension in the figure.
4. Install valve.  Install in the original position.NOTE:
Larger diameter valves are for intake side.
5. Install valve spring (with valve spring seat).  Install smaller pitch (valve spring seat side) to cylinder head
side.
6. Install valve spring retainer.
7. Install valve collet.
PBIC0072E
PBIC0073E
PBIC0074E
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EM-232
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
 Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnetic
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
 Tap stem edge lightly with plastic hammer after installation to check its installed condition.
8. Install valve lifter.  Install in the original position.
9. Install spark plug tube as follows:  Press-fit spark plug tube following procedure below.
a. Remove old liquid gasket adhering to cylinder-head mounting hole.
b. Apply sealant to area within approximately 12 mm (0 .47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking S ealant or equivalent. Refer to GI-44, "
Recommended Chemi-
cal Product and Sealant".
c. Using drift, press-fit spark plug tube so that its height “H” is as specified in the figure.
CAUTION:
 When press-fitting, take care not to deform spark plug
tube.
 After press-fitting, wipe off liquid gasket protruding onto
cylinder head upper face.
10. Install spark plug with spark plug wrench (commercial service tool).
Inspection After DisassemblyINFOID:0000000001325800
VALVE DIMENSIONS
 Check the dimensions of each valve. For the dimensions, refer to EM-266, "
Standard and Limit".
 If the dimensions are out of t he standard, replace valve and check
the valve seat contact. Refer to "VALVE SEAT CONTACT".
VALVE GUIDE CLEARANCE
Valve Stem Diameter
PBIC2360E
Standard press-fit height “H” :
38.4 - 39.4 mm (1.512 - 1.551 in)
PBIC2638E
SEM188A
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CYLINDER HEADEM-233
< SERVICE INFORMATION > [VK45DE]
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Measure the diameter of va
lve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with inside micrometer.
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).
 If the calculated value exceeds the limit, replac e valve and/or valve guide. When valve guide must be
replaced, refer to "VALVE GUIDE REPLACEMENT".
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130 °C (230
to 266 °F) by soaking in heated oil.
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US ton, 2.0 lmp ton) pressure] or hammer and valve guide drift
(commercial service tool).
CAUTION:
Cylinder head contains heat . When working, wear protec-
tive equipment to avo id getting burned.
Standard
Intake : 5.972 - 5.980 mm (0.2351 - 0.2354 in)
Exhaust : 5.962 - 5.970 mm (0.2347 - 0.2350 in)
SEM938C
Standard Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard Intake : 0.020 - 0.046 mm (0.0008 - 0.0018 in)
Exhaust : 0.030 - 0.056 mm (0.0012 - 0.0022 in)
Limit Intake : 0.08 mm (0.0031 in)
Exhaust : 0.1 mm (0.004 in)
SEM008A
SEM931C
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EM-234
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
3. Using valve guide reamer (commercial service tool), ream cylin-
der head valve guide hole.
4. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil.
5. Using valve guide drift (commercial service tool), press valve guide from camshaft side to the dimensions as in the figure.
CAUTION:
Cylinder head contains heat . When working, wear protec-
tive equipment to avo id getting burned.
6. Using valve guide reamer (commercial service tool), apply reamer finish to valve guide.
VALVE SEAT CONTACT
 After confirming that the dimensi ons of valve guides and valves are
within the specifications, perform this procedure.
 Apply prussian blue (or white lead) onto contacting surface of valve
seat to check the condition of the valve contact on the surface.
 Check if the contact area band is continuous all around the circum- ference.
 If not, grind to adjust valve fitting and check again. If the contacting surface still has “NG” conditions even after the re-check, replace
valve seat. Refer to "VALVE SEAT REPLACEMENT". Valve guide hole diameter (for service parts):
Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
PBIC0078E
Standard: Intake and exhaust: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C
SBIA0322E
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CYLINDER HEADEM-235
< SERVICE INFORMATION > [VK45DE]
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VALVE SEAT REPLACEMENT
When valve seat is removed, replace with
oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring shoul d not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-266, "
Standard and Limit".
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.
 Be sure to ream in circles concentric to valve guide center.This will enable valve to fit correctly.
3. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head. CAUTION:
 Avoid directly touching cold valve seats.
 Cylinder head contains heat. Wh en working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve seat grinder, finish seat to the specified dimensions. Refer to
EM-266, "
Standard and Limit".
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on with cutter or cu tting many different times may
result in stage valve seat.
6. Using compound, grind to adjust valve fitting.
7. Check again for normal contact. Refer to "VALVE SEAT CONTACT".
VALVE SPRING SQUARENESS
Oversize (Service) [0.5 mm (0.020 in)] Intake : 37.500 - 37.516 mm (1.4764 - 1.4770 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A
SEM934C
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EM-236
< SERVICE INFORMATION >[VK45DE]
CYLINDER HEAD
 Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.
 If it exceeds the limit, replace valve spring.
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
 Check valve spring pressure at the specified spring height.
 If the installation load or load with valve open is out of the standard, replace valve spring.
Limit : 2.0 mm (0.079 in)
PBIC0080E
Standard:
Intake and exhaustFree height : 46.35 - 46.85 mm (1.8248 - 1.8445 in)
Installation height : 33.8 mm (1.331 in)
Installation load : 165 - 189 N (16.8 - 19.3 kg, 37 - 42 lb)
Height during valve open : 24.4 mm (0.961 in)
Load with valve open : 290 - 330 N (29.6 - 33.7 kg, 65 - 74 lb)
SEM113
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ENGINE ASSEMBLYEM-237
< SERVICE INFORMATION > [VK45DE]
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ENGINE ASSEMBLY
ComponentINFOID:0000000001325801
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325802
WARNING:
 Situate vehicle on a flat and solid surface.
 Place chocks at front and back of rear wheels.
 For engines not equipped with engi ne slingers, attach proper slingers and bolts described in PARTS
CATALOG.
CAUTION:
 Always be careful to work safely, avoid forceful or uninstructed operations.
 Do not start working until exhaust system and engine coolant are cool enough.
 If items or work required are not covered by th e engine section, refer to the applicable sections.
 Always use the support poin t specified for lifting.
 Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for unavoid-
able reasons, support at the rear axle jacking poin t with transmission jack or similar tool before
starting work, in prepar ation for the backward shif t of center of gravity.
 For supporting points fo r lifting and jacking point at rear axle, refer to GI-37, "
Garage Jack and
Safety Stand".
REMOVAL
Outline
At first, remove engine, transmission assembly and front final drive with front suspension member from vehicle
downward. Then separate engine from transmission.
Preparation
1. Engine mounting bracket (RH) 2. Engine mounting insulator (RH) 3. Engine mounting bracket (LH)
4. Engine mounting insulator (LH) 5. Plate 6. Collar
7. Grommet 8. Engine rear member 9. Engine mounting insulator (rear)
JPBIA0902GB
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