Nissan Primera P11. Instruction — part 393
Components
NCEM0016
1.
Oil filler cap
2.
Rocker cover
3.
Rocker cover gasket
4.
VTC solenoid
5.
Camshaft bracket
6.
Intake camshaft
7.
Exhaust camshaft
8.
Timing chain guide
9.
Cylinder head bolt
10. Shim
11. Valve lifter
12. Valve cotter
13. Valve spring retainer
14. Valve spring
15. 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 “Installation” in
“TIMING CHAIN”.
p
9
Refer to “Installation” in
“TIMING CHAIN”.
p
4
24.5 - 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 HEAD
QG
Components
EM-31
CAUTION:
I
When installing camshaft and oil seal, lubricate contacting
surfaces with new engine oil.
I
When tightening cylinder head bolts, camshaft sprocket
bolts and camshaft bracket bolts, lubricate bolt threads
and seat surfaces with new engine oil.
I
Attach tags to valve lifters so as not to mix them up.
Removal
NCEM0017
1.
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 (“Fuel Pressure Release”, “BASIC SER-
VICE PROCEDURE”).
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 HEAD
QG
Components (Cont’d)
EM-32
I
Rotate crankshaft until mating mark on camshaft sprocket
is set at position indicated in figure at left.
12. Remove camshaft position sensor (PHASE).
I
Do not allow any magnetic materials to contact the cam-
shaft position sensor (PHASE).
I
Be 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.
I
Apply paint to timing chain and cam sprockets for align-
ment during installation.
18. Remove camshaft sprockets.
19. Remove camshaft brackets and camshafts.
I
Apply I.D. marks to brackets to ensure correct reassembly.
I
Bolts 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 HEAD
QG
Removal (Cont’d)
EM-33
20. Remove cylinder head bolts.
21. Remove cylinder head with manifolds.
I
Head warpage or cracking could result from removing in
incorrect order.
I
Cylinder head bolts should be loosened in two or three
steps.
Disassembly
NCEM0018
1.
Remove valve components with Tool.
2.
Remove valve oil seal with a suitable tool.
Inspection
NCEM0019
CYLINDER HEAD DISTORTION
NCEM0019S01
I
Clean surface of cylinder head.
I
Use a reliable straightedge and feeler gauge to check the flat-
ness of cylinder head mating surface.
I
Check 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 “A”.
Amount of cylinder block resurfacing is “B”.
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 CHECK
NCEM0019S02
Check camshaft for scratches, seizure and wear.
SEM878F
Loosen in numerical order.
Engine front
SEM914F
KV10109220
KV10116200
SEM915F
Straightedge
Feeler gauge
CYLINDER HEAD
QG
Removal (Cont’d)
EM-34
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