INFINITI FX35 2008 Service Manual

OIL SEALEM-97
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OIL SEAL
Removal and Installation of Valve Oil SealINFOID:0000000001325734
REMOVAL
1. Remove camshaft relating to valve oil seal to be removed. Refer to
EM-83, "Component".
2. Remove valve lifters. Refer to EM-83, "
Component".
3. Turn crankshaft until the cylinder requiring new oil seal s is at TDC. This will prevent valve from dropping
into cylinder.
4. Remove valve collet.  Compress valve spring with the valve spring compressor, theattachment, the adapter (SST). Remove valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
5. Remove valve spring retainer, and valve spring.
6. Remove valve oil seal using the valve oil seal puller (SST).
INSTALLATION
1. Apply new engine oil on new valve oil seal joint and seal lip.
2. Using the valve oil seal drift (SST), press fit valve seal to height “H” shown in figure.
NOTE:
Dimension “H”: Height measured before valve spring seat instal-
lation
3. Install in the reverse order of removal after this step.
Removal and Installati on of Front Oil SealINFOID:0000000001325735
REMOVAL
1. Remove the following parts:
 Undercover
 Drive belts: Refer to EM-15, "
Removal and Installation".
 Crankshaft pulley: Refer to EM-64, "
Component".
PBIC1803E
PBIC0884E
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E
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EM-98
< SERVICE INFORMATION >[VQ35DE]
OIL SEAL
2. Remove front oil seal using a suitable tool.
CAUTION:
Be careful not to damage front timing chain case and crank-
shaft.
INSTALLATION
1. Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.
2. Install front oil seal. Install front oil seal so that each seal lip is oriented as shown in
the figure.
 Using a suitable drift, press-fit until the height of front oil seal is level with the mounting surface.
- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter
50 mm (1.97 in).
 Make sure the garter spring is in position and seal lips not inverted
CAUTION:
 Be careful not to damage front timing chain case and
crankshaft.
 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 SealINFOID:0000000001325736
REMOVAL
1. Remove oil pan (upper). Refer to EM-30, "Component (2WD Models)".
2. Remove transmission assembly. Refer to AT-241, "
Removal and Installation (2WD Models)".
3. Remove drive plate. Refer to EM-122, "
Component".
4. Use a seal cutter (SST) to cut away liquid gasket and remove rear oil seal retainer.
CAUTION:
Be careful not to damage mounting surface.
NOTE:
Regard both rear oil seal and retainer as an assembly.
SEM829E
SEM715A
SEM829E
SEM830E
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OIL SEALEM-99
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INSTALLATION
1. Remove old liquid gasket on mating surfaces of cylinder block and oil pan (upper) using a scraper.
2. Apply new engine oil to both oil seal lip and dust seal lip of new rear oil seal retainer.
3. Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to rear oil seal retainer as shown in the
figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
 Assembly should be done within 5 minutes after coating.
4. Install rear oil seal retainer to cylinder block. Refer to EM-122, "
Component".
 Make sure the garter spring is in position and seal lips not inverted.
5. Install in the reverse order of removal after this step.
PBIC2661E
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EM-100
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CYLINDER HEAD
CYLINDER HEAD
On-Vehicle ServiceINFOID:0000000001325737
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to
EC-87, "
Fuel Pressure Check".
3. Disconnect fuel pump fuse to avoid fuel injection during mea- surement.
4. Remove engine cover with power tool. Refer to EM-19, "
Component".
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-42, "
Component" and EM-43, "Com-
ponent".
6. Connect engine tachometer (not required in use of CONSULT-III).
7. Install compression gauge with an adapter (commercial service tool) onto spark plug hole.
 Use the adapter whose picking up end inserted to spark plughole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.
8. Turn ignition switch to “START” for cranking. When the gauge pointer stabilizes, read the compression
pressure and the engine rpm. Perform these steps to check each cylinder.
Compression pressure:
Unit: kPa (kg/cm2, psi) /rpm
CAUTION:
Always use a fully changed battery to obtain the specified engine speed.
SBIA0466E
PBIC0900E
SBIA0533E
Standard Minimum Deference limit between cylinders
1,275 (13.0, 185)/300 981 (10.0, 142)/300 98 (1.0, 14)/300
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CYLINDER HEADEM-101
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 If the engine speed is out of the specified range, c
heck battery liquid for proper gravity. Check the
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, pi ston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
 If some cylinder has 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 pis- ton 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. Repl ace 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, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
9. After inspection is completed, install removed parts.
10. Start the engine, and make sure that the engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-89, "
Trouble Diagnosis Introduction".
ComponentINFOID:0000000001325738
Removal and InstallationINFOID:0000000001325739
REMOVAL
1. Remove camshaft. Refer to EM-83, "Component".
NOTE:
It is also possible to perform the following steps 2 and 3 just before removing camshaft.
2. Temporarily fit front suspension member to support engine. Refer to FSU-16, "
Removal and Installation".
CAUTION:
1. Engine rear lower slinger 2. Cylinder head (left bank) 3. Cylinder head bolt
4. Cylinder head (right bank) 5. Cylinder head gasket (right bank) 6. Cylinder head gasket (left bank)
7. Oil level gauge guide
SBIA0581E
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EM-102
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CYLINDER HEAD
Temporary fitting means the status that engine is
adequately stable though the hoist is released
from hanging.
NOTE:
At the time of the start of this procedure front suspension member is removed, and cylinder head is
hanged by hoist with the engine slinger installed.
3. Release the hoist from hanging, then remove the engine slinger.
4. Remove the following parts:  Fuel tube and fuel injector assembly: Refer to EM-45, "
Component".
 Intake manifold: Refer to EM-24, "
Component".
 Exhaust manifold: Refer to EM-26, "
Component".
 Water inlet and thermostat assembly: Refer to CO-27, "
Component".
 Water outlet, water pipe and heater pipe: Refer to CO-29, "
Component".
5. Remove cylinder head bolts in reverse order as shown in the fig- ure with cylinder head bolt wrench (commercial service tool) and
power tool to remove cylinder heads (right and left banks).
6. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Cylinder Head Bolt s 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 appear s 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-138, "
Inspec-
tion After Disassembly".
1. Using a scraper, wipe off oil, scale, gasket, seal ant and carbon deposits from surface of cylinder head.
CAUTION:
Do not allow gasket fragme nts to enter engine oil or engine coolant passages.
PBIC2057E
Limit (“d1” – “d2”) : 0.11 mm (0.0043 in)
PBIC2480E
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CYLINDER HEADEM-103
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2. At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions.
 If it exceeds the limit, replace cylinder head.
INSTALLATION
1. Install new cylinder head gaskets.
2. Turn crankshaft until No. 1 piston is set at TDC. Crankshaft key should line up with the right 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 with cylin-
der head bolts wrench (commercial service tool).
CAUTION:
If cylinder head bolts re-used, check their outer diameters
before installation. Refer to "Cylinder Head Bolts Outer
Diameter".
a. Apply new engine oil to threads and seat surfaces of cylinder head bolts.
b. Tighten all cylinder head bolts.
c. Completely loosen all cylinder head bolts.
CAUTION:
In step “c”, loosen bolts in reverse order of that indicated in
the figure.
d. Tighten all cylinder head bolts. Limit : 0.1 mm (0.004 in)
SEM861E
SEM532G
: 98.1 N·m (10 kg-m, 72 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
PBIC2057E
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EM-104
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CYLINDER HEAD
e. Turn all cylinder head bolts 90 degrees clockwise (angle tighten-
ing).
CAUTION:
Check the tightening angle by using the angle wrench
(SST). Avoid judgment by vi sual inspection without SST.
 Check tightening angle indicated on the angle wrench indica-
tor plate.
f. Turn all cylinder head bolts 90 degrees clockwise again (angle tightening).
4. After installing cylinder head, measure distance between front end faces of cylinder block and cylinder head (left and right
banks).
 If measured value is out of the standard, re-install cylinderhead.
5. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak. Before starting engine, check oil/fluid levels incl uding engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-9, "
Fluids and Lubricants".
 Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, che ck again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration.
 Warm up engine thoroughly to make sure there is no leak age of fuel, exhaust gases, or any oil/fluids includ-
ing engine oil and engine coolant.
 Bleed air from lines and hoses of applic able lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
PBIC0888E
Standard : 14.1 - 14.9 mm (0.555 - 0.587 in)
EMQ0662D
Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —
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CYLINDER HEADEM-105
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Disassembly and AssemblyINFOID:0000000001325740
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 the valve spring compressor, theattachment and the adapter (SST). Remove valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer, valve spring and valve spring seat.
5. Push valve stem to combustion chamber side, and remove valve.  Identify installation positions, and store them without mixing them up.
1. Valve lifter 2. Valve collet 3. Valve spring retainer
4. Valve spring 5. Valve oil seal 6. Valve spring seat
7. Valve guide 8. Spark plug 9. Spark plug tube
10. Cylinder head (right bank) 11. Valve seat 12. Valve (EXH)
13. Valve (INT) 14. Cylinder head (left bank)
PBIC2637E
PBIC1803E
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EM-106
< SERVICE INFORMATION >[VQ35DE]
CYLINDER HEAD
6. Remove valve oil seal using the valve oil seal puller (SST).
7. If valve seat must be replaced, refer to
EM-107, "
Inspection After Disassembly".
8. If valve guide must be replaced, refer to EM-107, "
Inspection After Disassembly".
9. Remove spark plug tube, as necessary.  Using a 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-107, "Inspection After Disassembly".
2. When valve seat is removed, install it. Refer to EM-107, "
Inspection After Disassembly".
3. Install new valve oil seals as follows:
a. Apply new engine oil on valve oil seal joint and seal lip.
b. Install with the valve oil seal drift (SST) to match dimension in the figure.
4. Install valve spring seat.
5. Install valve.  Larger diameter valves are for intake side.NOTE:
Larger diameter valves are for intake side.
6. Install valve spring (uneven pitch type).  Install narrow pitch end (paint mark) to cylinder head side(valve spring seat side).
 Intake side and exhaust side valve springs are different. Install
them referring to the following paint mark collar.
7. Install valve spring retainer.
PBIC0884E
Height “H” (Without valve spring seat installed) Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
PBIC2769E
Paint mark collarIntake and Exhaust : Blue
SEM085D
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