exh INFINITI FX35 2004 Service Manual

CAMSHAFT
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Revision: 2004 November 2004 FX35/FX45

No. 1 cylinder at compression TDC
c. Rotate crankshaft by 240° clockwise (when viewed from front) to
align No. 3 cylinder at TDC of its compression stroke.
NOTE:
Crankshaft pulley mounting bolt flange has a stamped line every
60°. They can be used as a guide to rotation angle.

No. 3 cylinder at compression TDC
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
No. 1 cylinder at
TDCEXH×
INT×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 1 cylinder at
TDCINT×
EXH×
PBIC2054E
SEM751G
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
No. 3 cylinder at
TDCEXH×
INT×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 3 cylinder at
TDCINT×
EXH ×
PBIC2055E

EM-92
[VQ35DE]
CAMSHAFT
Revision: 2004 November 2004 FX35/FX45
d. Rotate crankshaft by 240 degrees clockwise (when viewed from
engine front) to align No. 5 cylinder at TDC of compression
stroke.

No. 5 cylinder at compression TDC
CAUTION:
If inspection was carried out with cold engine, make sure
values with fully warmed up engine are still within speci-
fications.
3. For measurements that are outside the specified range, perform adjustment below.
ADJUSTMENT

Perform adjustment depending on selected head thickness of valve lifter.

The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differ-
ences caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove camshaft. Refer to EM-83, "
REMOVAL" .
2. Remove valve lifters at the locations that are outside the standard.
3. Measure the center thickness of the removed valve lifters with a
micrometer.
4. Use the equation below to calculate valve lifter thickness for replacement.
SEM751G
Measuring position (right bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
No. 5 cylinder at
TDCEXH×
INT×
Measuring position (left bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.
No. 5 cylinder at
TDCINT×
EXH ×
PBIC2056E
KBIA0057E

CAMSHAFT
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Revision: 2004 November 2004 FX35/FX45

Valve lifter thickness calculation:
Thickness of replacement valve lifter = t1+ (C1 - C2)
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance
C2= Standard valve clearance:

Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark 788U or 788R indicates 7.88 mm (0.3102 in) in
thickness.
NOTE:
2 types of stamp marks are used for parallel setting and for
manufacturer identification.
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of 0.02
mm (0.0008 in) (when manufactured at factory). Refer to EM-149, "
Available Valve Lifter" .
5. Install selected valve lifter.
6. Install camshaft.
7. Manually turn crankshaft pulley a few turns.
8. Make sure valve clearances for cold engine are within specifications by referring to the specified values.
9. After completing the repair, check valve clearances again with the specifications for warmed engine. Make
sure the values are within specifications.
Valve clearance:
Unit: mm (in)
*: Approximately 80°C (176°F)
Intake : 0.30 mm (0.012 in)*
Exhaust : 0.33 mm (0.013 in)*
*: Approximately 20°C (68°F)
KBIA0119E
Items Cold Hot * (reference data)
Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.016)

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OIL SEAL
Revision: 2004 November 2004 FX35/FX45
OIL SEALPFP:00100
Removal and Installation of Valve Oil SealABS004X4
REMOVAL
1. Remove camshaft relating to valve oil seal to be removed. Refer to EM-82, "CAMSHAFT" .
2. Remove valve lifters. Refer to EM-82, "
CAMSHAFT" .
3. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping
into cylinder.
4. Using valve spring compressor, attachment and adapter (SST),
remove valve collet with magnet hand. Then remove valve
spring and valve spring seat.
5. Remove valve oil seal using valve oil seal puller (SST).
INSTALLATION
1. Apply engine oil on new valve oil seal joint and seal lip.
2. Using valve oil seal drift (SST), press fit valve seal to height “H”
shown in the figure.
NOTE:
Dimension “H”: Height measured before valve spring seat instal-
lation
3. Perform steps in the reverse order of removal for the following operations.
PBIC1803E
PBIC0884E
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC0802E

EM-100
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
NOTE:
At the time of the start of this procedure front suspension member is removed, and cylinder head is
hanged by hoist with engine slinger installed.
3. Release hoist from hanging, then remove engine slinger.
4. Remove the following components and related parts:

Fuel tube and fuel injector assembly. Refer to EM-45, "FUEL INJECTOR AND FUEL TUBE" .

Intake manifold. Refer to EM-24, "INTAKE MANIFOLD" .

Exhaust manifold. Refer to EM-26, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .

Water inlet and thermostat assembly. Refer to CO-26, "WATER INLET AND THERMOSTAT ASSEM-
BLY" .

Water outlet and water piping. Refer to CO-28, "WATER OUTLET AND WATER PIPING" .
5. Remove cylinder head loosening bolts with power tool in reverse
order shown in the figure and using cylinder head bolt wrench
(commercial service tool).
6. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Outer Diameter of Cylinder Head Bolts

Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between d1 and d2
exceeds the limit, replace them with new one.

If reduction of outer diameter appears in a position other than
d2, use it as d2 point.
Cylinder Head Distortion
NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to EM-139, "
CYLIN-
DER BLOCK DISTORTION" .
1. Using scraper, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.
CAUTION:
Do not allow gasket fragments to enter engine oil or engine coolant passages.
PBIC2057E
Limit (d1 - d2) : 0.11 mm (0.0043 in)
SEM957E

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.

Mark position on valve lifter for assembly.
3. Remove valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Remove valve collet with magnet
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer and valve spring.
5. Push valve stem to combustion chamber side, and remove
valve.

Inspect valve guide clearance before removal. Refer to EM-
105, "VALVE GUIDE CLEARANCE" .

Mark position on valve for assembly.
6. Remove valve oil seals using valve oil seal puller (SST).
7. Remove valve spring seat.
8. If valve seat must be replaced, refer to EM-107, "
VALVE SEAT CONTACT" .
9. If valve guide must be replaced, refer to EM-105, "
VALVE GUIDE CLEARANCE" .
10. Remove spark plug tube, as necessary.

Using a pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:

Take care not to damage cylinder head.

Once removed, a spark plug tube will be deformed and cannot be reused. Do not remove it
unless absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-105, "VALVE GUIDE CLEARANCE" .
2. When valve seat is removed, install it. Refer to EM-107, "
VALVE SEAT CONTACT" .
3. Install valve oil seals.

Install with valve oil seal drift (SST) to match dimension in
illustration.
4. Install valve spring seat.
10. Cylinder head (right bank) 11. Valve seat 12. Valve (EXH)
13. Valve (INT) 14. Cylinder head (left bank)
PBIC1803E
PBIC0884E
Height “H” (Without valve spring seat installed)
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC0802E

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure inner diameter of valve guide with inside micrometer.
Valve Guide Inner Diameter
Measure inner diameter of valve guide with inside micrometer.
Valve Guide Clearance

(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).

If it exceeds the limit, replace valve guide and / or valve.
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. Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 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 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit
Intake : 0.08 mm (0.003 in)
Exhaust : 0.09 mm (0.004 in)
SEM008A

EM-106
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
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 suitable tool.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
3. Using valve guide reamer, ream cylinder head valve guide hole.
4. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
5. Press valve guide from camshaft side to dimensions as in illus-
tration.
CAUTION:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer, apply reamer finish to valve guide.
SEM931C
Valve guide hole diameter (for service parts):
Intake and exhaust
: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
Projection “L”
Intake and exhaust
: 12.6 - 12.8 mm (0.496 - 0.504 in)
SEM950E
Standard:
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
VALVE SEAT CONTACT

After confirming that the dimensions of valve guides and valves
are within 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 sur-
face.

Check if the contact area band is continuous all around the cir-
cumference.

If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has NG conditions even after the re-check,
replace valve seat.
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 should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this.
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 the 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. When working, wear protective equipment to avoid getting burned.
SBIA0322E
Oversize [0.5 mm (0.020 in)]
Intake: 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust: 32.700 - 32.716 mm (1.2874 - 1.2880 in)
SEM795A
SEM008A

CYLINDER HEAD
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Revision: 2004 November 2004 FX35/FX45
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

Check the valve spring pressure at specified spring height.

If the installation load or load with valve open is out of the standard, replace valve spring.Standard:
Intake and exhaust
Free height
: 47.07 mm (1.8531 in)
Installation height
: 37.0 mm (1.457 in)
Installation load
: 166 - 188 N (16.9 - 19.2 kg, 37.3 - 42.3 lb)
Height during valve open
: 27.2 mm (1.0709 in)
Load with valve open
: 373 - 421 N (38.0 - 42.9 kg, 83.9 - 94.6 lb)
SEM113