Oil INFINITI M35 2006 Factory Service Manual

OIL SEAL
EM-231
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Revision: 2006 January2006 M35/M45
Install front oil seal so that each seal lip is oriented as shown
in the figure.
Using front oil seal drift, press fit until the height of front oil
seal is level with the mounting surface.
Make sure the garter spring is in position and seal lips not
inverted.
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.
Removal and Installation of Rear Oil SealNBS004PE
REMOVAL
1. Remove transmission assembly. Refer to AT- 2 7 1 , "TRANSMISSION ASSEMBLY" .
a. Remove drive plate. Refer to EM-249, "
CYLINDER BLOCK" .
b. Remove rear plate. Refer to EM-249, "
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 new engine oil to both oil seal lip and dust seal lip of new rear oil seal.
2. Install rear oil seal.
Install rear oil seal so that each seal lip is oriented as shown
in the figure.
SEM715A
Front oil seal drift
Outer diameter : 56 mm (2.20 in)
Inner diameter : 49 mm (1.93 in)
SBIA0359E
SBIA0360E
SEM715A

EM-232
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OIL SEAL
Revision: 2006 January2006 M35/M45
Using rear oil seal drift (commercial service tool), press fit
until the height of front oil seal is level with the mounting sur-
face.
Make sure the garter spring is in position and seal lips not
inverted.
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.Rear oil seal drift
Outer diameter : 102 mm (4.02 in)
Inner diameter : 86 mm (3.39 in)
SBIA0360E

CYLINDER HEAD
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Revision: 2006 January2006 M35/M45
CYLINDER HEADPFP:11041
On-Vehicle ServiceNBS004PF
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-809, "
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-173, "
ENGINE ROOM COVER" .
4. Remove ignition coil and spark plug from each cylinder. Refer to EM-190, "
IGNITION COIL" and EM-191,
"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 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 the 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

EM-234
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CYLINDER HEAD
Revision: 2006 January2006 M35/M45
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, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
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-811, "
TROUBLE DIAGNOSIS" .
ComponentsNBS004PG
Removal and InstallationNBS004PH
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-244, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-183, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-215, "
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)
PBIC2756E

CYLINDER HEAD
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Revision: 2006 January2006 M35/M45
4. Remove cylinder head bolts in reverse order as shown in the fig-
ure with cylinder head bolt wrench (commercial service tool) to
remove cylinder heads (right and left banks).
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-269, "
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 the distortion in six directions.
If it exceeds the limit, replace cylinder head.
INSTALLATION
1. Install new 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

EM-236
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CYLINDER HEAD
Revision: 2006 January2006 M35/M45
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 with cylin-
der head bolt wrench (commercial service tool).
CAUTION:
If cylinder head bolts are re-used, check their outer diame-
ters before installation. Refer to EM-235, "
Cylinder Head
Bolts Outer Diameter" .
a. Apply new engine oil to threads and seating surface of cylinder
head bolts.
b. Tighten all cylinder head bolts.
c. Completely loosen all cylinder head bolts.
CAUTION:
In step “c”, loosen cylinder head bolts in reverse order of that indicated in the figure.
d. Tighten all cylinder head bolts.
e. Turn all cylinder head bolts 60 degrees clockwise. (Angle tight-
ening)
CAUTION:
Check the tightening angle by using angle wrench (SST).
Avoid judgment by visual inspection without SST.
Check tightening angle indicated on angle wrench indicator
plate.
f. Turn all cylinder head bolts 60 degrees clockwise again. (Angle
tightening)
4. Install in the reverse order of removal.
PBIC2389E
: 98.1 Nꞏm (10 kg-m, 72 ft-lb)
: 0 Nꞏm (0 kg-m, 0 ft-lb)
: 44 Nꞏm (4.5 kg-m, 33 ft-lb)
PBIC0068E
PBIC0069E

CYLINDER HEAD
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Revision: 2006 January2006 M35/M45
Disassembly and AssemblyNBS004PI
COMPONENTS
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 (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.
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)
PBIC2757E
PBIC2360E

EM-238
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CYLINDER HEAD
Revision: 2006 January2006 M35/M45
Identify installation positions, and store them without mixing them up.
6. Remove valve oil seal with valve oil seal puller (SST).
7. If valve seat must be replaced, refer to EM-242, "
VALVE SEAT REPLACEMENT" .
8. If valve guide must be replaced, refer to EM-240, "
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-240, "VALVE GUIDE REPLACEMENT" .
2. When valve seat is removed, install it. Refer to EM-242, "
VALVE SEAT REPLACEMENT" .
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.
PBIC0072E
PBIC0073E
PBIC0074E

EM-240
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CYLINDER HEAD
Revision: 2006 January2006 M35/M45
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with bore gauge.
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).
If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be
replaced, refer to EM-240, "
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).
WA R N I N G :
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid 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 (0.003 in)
Exhaust : 0.1 mm (0.004 in)
SEM008A
SEM931C

CYLINDER HEAD
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Revision: 2006 January2006 M35/M45
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 266F) 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.
WAR NING :
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer (commercial service tool), apply
reamer finish to valve guide.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