Page 1969 of 5121

EM-94
< DISASSEMBLY AND ASSEMBLY >
OIL SEAL
1. Remove the following parts:
Road wheel and tire (RH)
Splash guard (RH): Refer to EXT-22, "
FENDER PROTECTOR : Exploded View".
Drive belt: Refer to EM-12, "
Removal and Installation".
Crankshaft pulley: Refer to EM-52, "
Exploded View".
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).
Check 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.
REAR OIL SEAL
REAR OIL SEAL : Removal and InstallationINFOID:0000000003802288
REMOVAL
1. Remove transaxle assembly. Refer to TM-332, "Exploded View" (VQ25DE) or TM-168, "Exploded View"
(VQ35DE).
2. Remove drive plate. Refer to EM-107, "
Exploded View".
3. Remove oil pan (upper). Refer to EM-38, "
Exploded View".
SEM829E
A: Oil seal lip
B : Dust seal lip
: Engine inside
: Engine outside
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SEM829E
Page 1970 of 5121
OIL SEAL
EM-95
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4. Use a seal cutter (SST) to cut away liquid gasket and remove
rear oil seal retainer.
CAUTION:
Be careful not to damage mating surfaces.
NOTE:
Regard both rear oil seal and retainer a an assembly.
INSTALLATION
1. Remove old liquid gasket on mating surfaces of cylinder block and oil pan (upper) using scraper.
2. Apply new engine oil to both oil seal lip and dust seal lip of new 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 Liquid Gasket or equivalent.
CAUTION:
Attaching should be done within 5 minutes after coating.
4. Install rear oil seal retainer to cylinder block. Refer to EM-107, "
Exploded View".
Check the garter spring is in position and seal lips not inverted.
5. Install in the reverse order of removal after this step.
SEM830E
PBIC2649E
Page 1971 of 5121
EM-96
< DISASSEMBLY AND ASSEMBLY >
CYLINDER HEAD
CYLINDER HEAD
Exploded ViewINFOID:0000000003802289
REMOVAL
DISASSEMBLY
1. Oil level gauge 2. Cylinder head (bank 2) 3. Cylinder head bolt
4. Cylinder head (bank 1) 5. Cylinder head gasket (bank 1) 6. Cylinder head gasket (bank 2)
A. Refer to EM-97
Refer to GI-4, "Components" for symbols in the figure.
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CYLINDER HEAD
EM-97
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Removal and InstallationINFOID:0000000003802290
REMOVAL
1. Remove the following parts:
Oil level gauge
Intake manifold collector: Refer to EM-28, "
Exploded View".
Rocker cover: Refer to EM-49, "
Exploded View".
Fuel tube and fuel injector assembly: Refer to EM-44, "
Exploded View".
Intake manifold: Refer to EM-32, "
Exploded View".
Exhaust manifold: Refer to EM-34, "
Exploded View".
Water inlet and thermostat assembly: Refer to CO-23, "
Exploded View".
Water outlet, water connector, water bypass pipe and heater pipe: Refer to CO-25, "
Exploded View".
Timing chain and rear timing chain case: Refer to EM-52, "
Exploded View" and EM-79, "Exploded
View".
Camshaft: Refer to EM-84, "
Exploded View".
1. Valve lifter 2. Valve collet 3. Valve spring retainer
4. Valve spring 5. Valve oil seal 6. Valve spring seat
7. Valve guide (EXH) 8. Spark plug 9. Spark plug tube
10. Cylinder head (bank 1) 11. Valve seat (EXH) 12. Valve (EXH)
13. Valve (INT) 14. Valve seat (INT) 15. Valve guide (INT)
16. Cylinder head (bank 2)
: Apply high strength thread locking sealant or equivalent.
Refer to GI-4, "
Components" for symbols not described on the above.
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Page 1973 of 5121
EM-98
< DISASSEMBLY AND ASSEMBLY >
CYLINDER HEAD
2. 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 (bank 1 and bank 2).
3. Remove cylinder head gaskets.
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 bank 1 cylinder center
line as shown in the figure.
A: Bank 1
B: Bank 2
: Engine front
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1 : Crankshaft key
: Bank 1 side
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Page 1974 of 5121

CYLINDER HEAD
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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 reused, check their outer diameters
before installation. Refer to EM-104, "
Inspection".
Before installing cylinder head, inspect cylinder head dis-
tortion. Refer to EM-104, "
Inspection".
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.
e. Turn all cylinder head bolts 103 degrees clockwise (angle tightening).
CAUTION:
Check the tightening angle by using the angle wrench [SST:
KV10112100 (BT8653-A)] (A). Avoid judgment by visual
inspection without.
Check tightening angle indicated on the angle wrench indica-
tor plate.
f. Turn all cylinder head bolts 103 degrees clockwise again (angle
tightening).
4. After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (bank 1 and bank
2).
If measured value is out of the standard, reinstall cylinder
head.
5. Install in the reverse order of removal after this step.
A: Bank 1
B: Bank 2
: Engine front
: 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)
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Standard : 14.1 - 14.9 mm (0.555 - 0.587 in)
EMQ0662D
Page 1975 of 5121

EM-100
< DISASSEMBLY AND ASSEMBLY >
CYLINDER HEAD
Disassembly and Assembly
INFOID:0000000003802291
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 [SST:
KV10116200 (J26336-A)] (A), the attachment [SST:
KV10115900 (J26336-20)] (C) and the adapter [SST:
KV10109220 ( — )] (B). 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.
6. Remove valve oil seal with the valve oil seal puller [SST:
KV10107902 (J38959)] (A).
7. Remove valve seat, if valve seat must be replaced.
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. Refer to EM-139, "
CylinderHead".
CAUTION:
Prevent to scratch cylinder head by excessive boring.
8. Remove valve guide, if valve guide must be replaced.
a. To remove valve guide, heat cylinder head to 110 to 130°C (230
to 266°F) by soaking in heated oil (A).
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Page 1976 of 5121
![NISSAN TEANA 2008 Service Manual CYLINDER HEAD
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b. Drive out valve guide with a press [under a 20 kN (2 ton, 2.0 lmp
ton) pressure] or a hammer and the valve guide dr NISSAN TEANA 2008 Service Manual CYLINDER HEAD
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b. Drive out valve guide with a press [under a 20 kN (2 ton, 2.0 lmp
ton) pressure] or a hammer and the valve guide dr](/manual-img/5/57391/w960_57391-1975.png)
CYLINDER HEAD
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b. Drive out valve guide with a press [under a 20 kN (2 ton, 2.0 lmp
ton) pressure] or a hammer and the valve guide drift (commer-
cial service tool).
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
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. Never remove it unless
absolutely necessary.
ASSEMBLY
1. If valve guide is removed in step 8 (DISASSEMBLY), install it.
Replace with oversized [0.2 mm (0.008 in)] valve guide.
a. Using the valve guide reamer (commercial service tool) (A),
ream cylinder head valve guide hole.
b. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil (A).
c. Using the valve guide drift (commercial service tool), press valve
guide from camshaft side to the dimensions as in the figure.
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
SEM931C
Valve guide hole diameter (for service parts):
Intake and exhaust
: Refer to EM-139, "
CylinderHead".
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Projection (A)
Intake and exhaust
: Refer to EM-139, "
CylinderHead".
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