Page 1569 of 2267
ReplacementNCEM0015VALVE OIL SEALNCEM0015S011. Remove rocker cover.
2. Remove camshaft.
3. Remove valve spring. Refer to EM-34.
4. Remove valve oil seal with Tool.
Piston concerned should be set at TDC to prevent valve from
falling.
5. Apply new engine oil to new valve oil seal and install it with
Tool.
FRONT OIL SEALNCEM0015S021. Remove the following parts:
IEngine under cover
IRH engine side cover
IGenerator and power steering drive belts
ICrankshaft pulley
2. Remove front oil seal from front cover.
IBe careful not to scratch front cover.
3. Apply new engine oil to new oil seal and install it using a suit-
able tool.
IInstall new oil seal in the direction shown.
SEM909F KV10107902
SEM910F 13.5
0.3 mm
(0.531
0.012 in)
KV10115600
SEM911F Front oil seal
SEM715A Engine
outside
Dust seal lip Engine
inside
Oil seal lip
SEM912F Suitable tool
OIL SEALQG
Replacement
EM-29
Page 1570 of 2267
REAR OIL SEALNCEM0015S031. Remove flywheel or drive plate.
2. Remove rear oil seal.
IBe careful not to scratch rear oil seal retainer.
3. Apply new engine oil to new oil seal and install it using a suit-
able tool.
IInstall new oil seal in the direction shown.
SEM096F
SEM715A Engine
outside
Dust seal lip Oil seal lip Engine
inside
SEM097F Suitable tool
OIL SEALQG
Replacement (Cont'd)
EM-30
Page 1571 of 2267
ComponentsNCEM0016
1. Oil filler cap
2. Rocker cover
3. Rocker cover gasket
4. VTC solenoid
5. Camshaft bracket
6. Intake camshaft
7. Exhaust camshaft8. Timing chain guide
9. Cylinder head bolt
10. Shim
11. Valve lifter
12. Valve cotter
13. Valve spring retainer
14. Valve spring15. Valve spring seat
16. Valve oil seal
17. Valve guide
18. Cylinder head
19. Cylinder head gasket
20. Valve seat
21. Valve
SEM913F To intake manifold
2.0 - 3.9 (0.20 - 0.40, 17.4 - 34.7)
6.3 - 8.3
(0.64 - 0.85, 55.6 - 73.8)
Refer to ªInstallationº in
ªTIMING CHAINº.
p9Refer to ªInstallationº in
ªTIMING CHAINº.
p424.5 - 34.3
(2.5 - 3.5,
18 - 25)
O-ring
6.3 - 8.3
(0.64 - 0.85,
55.6 - 73.8): N´m (kg-m, in-lb)
: N´m (kg-m, ft-lb)
: Use Genuine Liquid Gasket
or equivalent.
: Lubricate with new engine oil.
: Do not re-use.
CYLINDER HEADQG
Components
EM-31
Page 1572 of 2267

CAUTION:
IWhen installing camshaft and oil seal, lubricate contacting
surfaces with new engine oil.
IWhen tightening cylinder head bolts, camshaft sprocket
bolts and camshaft bracket bolts, lubricate bolt threads
and seat surfaces with new engine oil.
IAttach tags to valve lifters so as not to mix them up.
RemovalNCEM00171. Drain engine coolant from radiator and cylinder block.
Be careful not to spill coolant on drive belts.
2. Release fuel pressure.
Refer to EC section (ªFuel Pressure Releaseº, ªBASIC SER-
VICE PROCEDUREº).
3. Remove air duct to intake manifold collector.
4. Remove front undercovers.
5. Remove front exhaust tube.
6. Remove vacuum hoses, fuel hoses, water hoses, wires,
harness, connectors and so on.
7. Remove ignition coils.
8. Remove rocker cover bolts in numerical order as shown in the
figure.
9. Remove spark plugs.
10. Remove intake manifold rear supports.
11. Set No. 1 piston at TDC on its compression stroke.
SEM869F Drain plug
SEM870F Ignition coil
Engine front
SEM871F Remove in numerical order.
SEM872F
CYLINDER HEADQG
Components (Cont'd)
EM-32
Page 1573 of 2267

IRotate crankshaft until mating mark on camshaft sprocket
is set at position indicated in figure at left.
12. Remove camshaft position sensor (PHASE).
IDo not allow any magnetic materials to contact the cam-
shaft position sensor (PHASE).
IBe careful not to damage sensor.
13. Remove cylinder head front cover.
14. Remove timing chain guide from camshaft bracket.
15. Attach a suitable stopper pin to chain tensioner.
16. Remove chain tensioner.
17. Remove camshaft sprocket bolts.
IApply paint to timing chain and cam sprockets for align-
ment during installation.
18. Remove camshaft sprockets.
19. Remove camshaft brackets and camshafts.
IApply I.D. marks to brackets to ensure correct reassembly.
IBolts should be loosened in two or three steps.
SEM873F Mating mark
Mating mark
(EXH)
LH camshaft
sprocket (INT)
RH camshaft
sprocket
SEM874F Cylinder head
front cover
O-ring
Camshaft position
sensor (PHASE)
SEM875F Chain guide
Stopper pin
Chain tensioner
SEM876F Mating mark
877F Engine front
Loosen in numerical order.
CYLINDER HEADQG
Removal (Cont'd)
EM-33
Page 1574 of 2267

20. Remove cylinder head bolts.
21. Remove cylinder head with manifolds.
IHead warpage or cracking could result from removing in
incorrect order.
ICylinder head bolts should be loosened in two or three
steps.
DisassemblyNCEM00181. Remove valve components with Tool.
2. Remove valve oil seal with a suitable tool.
InspectionNCEM0019CYLINDER HEAD DISTORTIONNCEM0019S01IClean surface of cylinder head.
IUse a reliable straightedge and feeler gauge to check the flat-
ness of cylinder head mating surface.
ICheck along six positions shown in figure.
Head surface flatness:
Standard: Less than 0.03 mm (0.0012 in)
Limit: 0.1 mm (0.004 in)
If beyond the specified limit, replace or resurface it.
Resurfacing limit:
The limit for cylinder head resurfacing is determined by the
amount of cylinder block resurfacing.
Amount of cylinder head resurfacing is ªAº.
Amount of cylinder block resurfacing is ªBº.
The maximum limit is as follows:
A + B = 0.2 mm (0.008 in)
After resurfacing cylinder head, check that camshaft rotates freely
by hand. If resistance is felt, replace cylinder head.
Nominal cylinder head height:
117.8 - 118.0 mm (4.638 - 4.646 in)
CAMSHAFT VISUAL CHECKNCEM0019S02Check camshaft for scratches, seizure and wear.
SEM878F Loosen in numerical order.Engine front
SEM914F KV10109220
KV10116200
SEM915F Straightedge
Feeler gauge
CYLINDER HEADQG
Removal (Cont'd)
EM-34
Page 1575 of 2267

CAMSHAFT RUNOUTNCEM0019S031. Measure camshaft runout at the center journal.
Runout (Total indicator reading):
Standard
Less than 0.02 mm (0.0008 in)
Limit
0.1 mm (0.004 in)
2. If it exceeds the limit, replace camshaft.
CAMSHAFT CAM HEIGHTNCEM0019S041. Measure camshaft cam height.
Standard cam height:
Intake
QG16DE
40.220 - 40.410 mm (1.5835 - 1.5909 in)
QG18DE
40.610 - 40.800 mm (1.5988 - 1.6063 in)
Exhaust
40.056 - 40.245 mm (1.5770 - 1.5844 in)
Cam wear limit:
0.20 mm (0.0079 in)
2. If wear is beyond the limit, replace camshaft.
CAMSHAFT JOURNAL CLEARANCENCEM0019S051. Install camshaft bracket and tighten bolts to the specified
torque.
2. Measure inner diameter of camshaft bearing.
Standard inner diameter:
No. 1 bearing
28.000 - 28.021 mm (1.1024 - 1.1032 in)
No. 2 to No. 5 bearings
24.000 - 24.021 mm (0.9449 - 0.9457 in)
3. Measure outer diameter of camshaft journal.
Standard outer diameter:
No. 1 journal
27.935 - 27.955 mm (1.0998 - 1.1006 in)
No. 2 to No. 5 journals
23.935 - 23.955 mm (0.9423 - 0.9431 in)
4. If clearance exceeds the limit, replace camshaft and/or cylin-
der head.
Camshaft journal clearance:
Standard
SEM154D
SEM916F Micrometer
SEM917F Inside
micrometer
SEM156D
CYLINDER HEADQG
Inspection (Cont'd)
EM-35
Page 1576 of 2267
0.045 - 0.086 mm (0.0018 - 0.0034 in)
Limit
0.15 mm (0.0059 in)
CAMSHAFT END PLAYNCEM0019S061. Install camshaft in cylinder head. Refer to EM-24.
2. Measure camshaft end play.
Camshaft end play:
Standard
0.115 - 0.188 mm (0.0045 - 0.0074 in)
Limit
0.20 mm (0.0079 in)
3. If limit is exceeded, replace camshaft and remeasure end play.
IIf limit is still exceeded after replacing camshaft, replace
cylinder head.
CAMSHAFT SPROCKET RUNOUTNCEM0019S071. Install sprocket on camshaft.
2. Measure camshaft sprocket runout.
Runout (Total indicator reading):
Limit 0.15 mm (0.0059 in)
3. If it exceeds the limit, replace camshaft sprocket.
VALVE GUIDE CLEARANCENCEM0019S081. Measure valve deflection as shown in figure. (Valve and valve
guide wear the most in this direction.)
Valve deflection limit (Dial gauge reading):
Intake & Exhaust
0.2 mm (0.008 in)
SEM918F Dial guage
SEM919F
SEM345D Approx. 25 mm (0.98 in)
CYLINDER HEADQG
Inspection (Cont'd)
EM-36