Nissan X-Trail 32. Manual - part 1084

CYLINDER HEAD

EM-233

< UNIT DISASSEMBLY AND ASSEMBLY >

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Removal and Installation

INFOID:0000000010783816

REMOVAL

1.

Drain engine oil. Refer to 

LU-26, "Draining"

.

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 

CO-52, "Exploded View"

.

NOTE:
Can be removed and installed even when assembled with cylinder head.

3.

Remove front cover and timing chain. Refer to 

EM-210, "Exploded View"

.

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.

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EM-234

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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 

EM-239, "Inspection"

.

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 

EM-277, "Cylinder Head"

.

CAUTION:

Prevent to scratch cylinder head by excessive boring.

JPBIA1365ZZ

: Valve spring retainer

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EM-236

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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 

EM-277, "Cylinder Head"

.

JSBIA2468ZZ

PBIC3214J