2004 INFINITI FX35 Cylinder

OIL SEAL
EM-221
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Revision: 2004 November 2004 FX35/FX45
OIL SEALPFP:00100
Removal and Installation of Valve Oil SealABS006IM
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-236, "ENGINE ASSEMBLY" .
2. Remove camshaft relating to valve oil seal to be removed. Refer to EM-208, "
CAMSHAFT" .
3. Remove adjusting shims and valve lifters. Refer to EM-208, "
CAMSHAFT" .

Identify installation positions, and store them without mixing them up.
4. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping
into cylinder.
5. 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.
6. Remove valve spring retainer and valve spring.
CAUTION:
Do not remove valve spring seat from valve spring.
7. 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. Install valve oil seal.

Install with valve oil seal drift (SST) to match dimension in the
figure.
3. Install in the reverse order of removal after this step.
PBIC2360E
PBIC0072E
PBIC0073E

OIL SEAL
EM-223
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Revision: 2004 November 2004 FX35/FX45

Install it so that each seal lip is oriented as shown in the fig-
ure.
CAUTION:

Be careful not to damage front cover and oil pump drive
spacer.

Press fit straight and avoid causing burrs or tilting oil
seal.
3. Install in the reverse order of removal after this step.
Removal and Installation of Rear Oil SealABS006IO
REMOVAL
1. Remove transmission (with transfer) assembly. Refer to AT- 2 6 9 , "Removal and Installation (AWD mod-
els)" .
a. Remove drive plate. Refer to EM-240, "
CYLINDER BLOCK" .
b. Remove engine rear plate. Refer to EM-240, "
CYLINDER BLOCK" .
2. Remove rear oil seal using suitable tool.
CAUTION:
Be careful not to damage crankshaft and oil seal retainer
surface.
INSTALLATION
1. Apply engine oil to both oil seal lip and dust seal lip.
2. Using suitable drift, press fit until the height of front oil seal is
level with the mounting surface.

Install it so that each seal lip is oriented as shown in the fig-
ure.
CAUTION:

Be careful not to damage crankshaft and rear oil seal
retainer.

Press fit straight and avoid causing burrs or tilting oil
seal.
3. Install in the reverse order of removal after this step.
SEM715A
SBIA0360E
Suitable drift
Outer diameter : 102 mm (4.02 in)
Inner diameter : 86 mm (3.39 in)
SBIA0360E
SEM715A

EM-224
[VK45DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
CYLINDER HEADPFP:11041
On-Vehicle ServiceABS006IP
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-700, "
FUEL PRESSURE RELEASE" .
a. Remove fuel pump fuse to avoid fuel injection during measure-
ment.
3. Remove engine cover with power tool. Refer to EM-168, "
ENGINE ROOM COVER" .
4. Remove ignition coil and spark plug from each cylinder. Refer to EM-185, "
IGNITION COIL" and EM-186,
"SPARK PLUG (PLATINUM-TIPPED TYPE)" .
5. Connect engine tachometer (not required in use of CONSULT-II).
6. Install compression gauge with adapter (SST or commercial ser-
vice tool) onto spark plug hole.

Use compression gauge adapter (SST) which is required on
No. 7 and No. 8 cylinders.

Use compression gauge adapter (if no SST is used) whose
picking up end inserted to spark plug hole is smaller than 20
mm (0.79 in) in diameter. Otherwise, it may be caught by cyl-
inder head during removal.
7. With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and engine rpm. Perform these steps to check each cyl-
inder.
Compression pressure:
Unit: kPa (kg/cm2 , psi) /rpm
CAUTION:
Always use a fully changed battery to obtain specified engine speed.
PBIB1482E
PBIC1554E
SBIA0533E
Standard Minimum Deferential limit between cylinders
1,320 (13.5, 191) / 300 1,130 (11.5, 164) / 300 98 (1.0, 14) / 300

CYLINDER HEAD
EM-225
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Revision: 2004 November 2004 FX35/FX45

If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.

If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.

If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, gaskets are leaking. In such a case, replace cylinder head gas-
kets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-726, "
TROUBLE DIAGNOSIS" .
Removal and InstallationABS006IQ
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-236, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-178, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-208, "
CAMSHAFT" .
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2407E

EM-226
[VK45DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
4. Remove cylinder head bolts in reverse order as shown in the fig-
ure with cylinder head bolt wrench (commercial service tool).
5. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Cylinder Head Bolts Outer Diameter

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-259, "
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.
2. At each of several locations on bottom surface of cylinder head,
measure distortion in six directions.

If it exceeds the limit, replace cylinder head.
INSTALLATION
1. Install cylinder head gasket.
2. Turn crankshaft until No. 1 piston is set at TDC.
PBIC0068E
Limit (“d1” - “d2”) : 0.18 mm (0.0071 in)
PBIC2361E
Limit : 0.1 mm (0.004 in)
PBIC0075E

CYLINDER HEAD
EM-227
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Revision: 2004 November 2004 FX35/FX45

Crankshaft key should line up with the left bank cylinder cen-
ter line as shown in the figure.
3. Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown in the figure.
CAUTION:
If cylinder head bolts are re-used, check their outer diame-
ters before installation. Refer to EM-226, "
Cylinder Head
Bolts Outer Diameter" .
a. Apply engine oil to threads and seating surface of cylinder head
bolts.
b. Tighten all bolts. 98.1 N·m (10 kg-m, 72 ft-lb).
c. Completely loosen all bolts.
CAUTION:
In step “c”, loosen bolts in reverse order of that indicated in the figure.
d. Tighten all bolts to 44.1 N·m (4.5 kg-m, 33 ft-lb).
e. Turn all bolts 60 degrees clockwise. (Angle tightening)
CAUTION:
Check and confirm the tightening angle by using angle
wrench (SST) and cylinder head bolt wrench (commercial
service tool). Avoid judgment by visual inspection without
SST.
f. Turn all bolts 60 degrees clockwise again. (Angle tightening)
4. Install in the reverse order of removal after this step.
PBIC2389E
: 98.1 N·m (10 kg-m, 72 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
: 44 N·m (4.5 kg-m, 33 ft-lb)PBIC0068E
PBIC0069E

EM-228
[VK45DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
Disassembly and AssemblyABS006IR
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove adjusting shim and 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.
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.
1. Spark plug 2. Adjusting shim 3. Valve lifter
4. Valve collet 5. Valve spring retainer 6. Valve spring (with valve spring seat)
7. Valve oil seal 8. Valve guide 9. Valve seat
10. Valve (INT) 11. Valve (EXH) 12. Cylinder head (left bank)
13. Spark plug tube 14. Cylinder head (right bank)
PBIC2362E
PBIC2360E

CYLINDER HEAD
EM-229
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Revision: 2004 November 2004 FX35/FX45
6. Remove valve oil seal with valve oil seal puller (SST).
7. If valve seat must be replaced, refer to EM-233, "
VALVE SEAT REPLACEMENT" .
8. If valve guide must be replaced, refer to EM-231, "
VALVE GUIDE REPLACEMENT" .
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 deformed and cannot be reused. Do not remove it unless
absolutely necessary.
ASSEMBLY
1. When valve guide is removed, install it. Refer to EM-231, "VALVE GUIDE REPLACEMENT" .
2. When valve seat is removed, install it. Refer to EM-233, "
VALVE SEAT REPLACEMENT" .
3. Install valve oil seal.

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.

Install smaller pitch (valve spring seat side) to cylinder head
side.
6. Install valve spring retainer.
PBIC0072E
PBIC0073E
PBIC0074E