Nissan X-Trail 32. Manual — part 1084
CYLINDER HEAD
EM-233
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Removal and Installation
INFOID:0000000010783816
REMOVAL
1.
Drain engine oil. Refer to
.
2.
Remove the following components and related parts.
• Exhaust manifold and three way catalyst assembly: Refer to
EM-180, "Removal and Installation"
• Intake manifold and fuel tube assembly: Refer to
EM-176, "Removal and Installation"
.
• Water control valve and water control valve housing (water outlet): Refer to
.
NOTE:
Can be removed and installed even when assembled with cylinder head.
3.
Remove front cover and timing chain. Refer to
4.
Remove camshafts. Refer to
EM-222, "Removal and Installation"
.
5.
Securely support bottom of cylinder block with a jack or equivalent tool, and release the hoist that was
supporting it.
Valve collet
Valve spring retainer
Valve spring (with valve spring seat)
Valve oil seal
Valve guide
Spark plug tube
Cylinder head
Valve seat (INT)
Valve (INT)
Valve seat (EXH)
Valve (EXH)
: Apply thread locking sealant.
: Always replace after every disassembly.
: Should be lubricated with oil.
JSBIA3389ZZ
EM-234
< UNIT DISASSEMBLY AND ASSEMBLY >
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CYLINDER HEAD
6.
Remove cylinder head loosening bolts in reverse order as
shown in the figure.
• Using TORX socket (size E20), loosen cylinder head bolts.
7.
Remove cylinder head gasket.
INSTALLATION
1.
Install cylinder head gasket.
2.
Tighten cylinder head bolts in numerical order as shown in figure
with the following procedure, and install cylinder head.
CAUTION:
If cylinder head bolts are re-used, check their outer diame-
ters before installation. Refer to
.
a.
Apply new engine oil to threads and seating surface of mounting
bolts.
b.
Tighten all bolts.
c.
Turn all bolts 60 degrees clockwise (angle tightening).
d.
Completely loosen.
CAUTION:
In this step, loosen bolts in reverse order of that indicated in the figure.
e.
Tighten all bolts.
f.
Turn all bolts 75 degrees clockwise (angle tightening).
g.
Turn all bolts 75 degrees clockwise again (angle tightening).
CAUTION:
Check and confirm the tightening angle by using an angle
wrench [SST:KV10112100] (A) or protractor. Avoid judgment
by visual inspection without the tool.
3.
Install in the reverse order of removal after this step.
Disassembly and Assembly
INFOID:0000000010783817
DISASSEMBLY
: Engine front
AWBIA1325GB
: Engine front
: 50.0 N·m (5.1 kg-m, 37 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
AWBIA1325GB
JSBIA2465ZZ
CYLINDER HEAD
EM-235
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1.
Remove spark plug with spark plug wrench (commercial service tool).
2.
Remove spark plug tube, if necessary.
• Using pliers, remove it from cylinder head.
CAUTION:
• Be careful not to damage cylinder head.
• Never remove spark plug tube if not necessary. Once removed, spark plug tube cannot be
reused because of deformation.
3.
Remove valve lifter.
• Identify installation positions, and store them without mixing them up.
4.
Remove valve collet.
• Compress valve spring with valve spring compressor [SST:
KV10116200] (A), adapter [SST: KV10109220] (B) and attach-
ment [SST: KV10115900] (C).
CAUTION:
• Never damage valve lifter holes.
• Fit the attachment [SST: KV10115900] (A) in the center of
valve spring retainer to press it.
5.
Remove valve spring retainer and valve spring (with valve spring seat).
CAUTION:
Never remove valve spring seat from valve spring.
6.
Push valve stem to combustion chamber side, and remove valve.
• Identify installation positions, and store them without mixing them up.
7.
Remove valve oil seal with a valve oil seal puller [SST:
KV10107902] (A).
8.
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
CAUTION:
Prevent to scratch cylinder head by excessive boring.
JPBIA1365ZZ
: Valve spring retainer
JSBIA3390ZZ
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CYLINDER HEAD
9.
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
.
b.
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 suitable tool (A).
CAUTION:
Cylinder head contains heat, when working, wear protective
equipment to avoid getting burned.
ASSEMBLY
1.
Install valve guide if removed.
CAUTION:
Replace with oversize [0.2 mm (0.008 in)] valve guide.
a.
Ream cylinder head valve guide hole with a valve guide reamer
(commercial service tool) (A).
b.
Heat cylinder head to 110 to 130
°
C (230 to 266
°
F) by soaking in
heated oil
.
PBIC3214J
JSBIA2470ZZ
For service parts
: Oversize [0.2 mm (0.008 in)]
Refer to
.
JSBIA2468ZZ
PBIC3214J
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