Nissan X-Trail 32. Manual - part 1049

CYLINDER HEAD

EM-93

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

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Removal and Installation

INFOID:0000000010783726

REMOVAL

1.

Release fuel pressure. Refer to 

EC-152, "Work Procedure"

.

2.

Drain engine coolant and engine oil. Refer to 

CO-13, "Draining"

 and 

LU-10, "Draining"

.

3.

Remove the following components and related parts.
• Intake manifold: Refer to 

EM-33, "Exploded View"

.

• Exhaust manifold: Refer to 

EM-37, "Exploded View"

.

• High pressure fuel pump: Refer to 

EM-43, "Exploded View"

.

• Fuel tube and fuel injector assembly: Refer to 

EM-48, "Exploded View"

.

• Water outlet: Refer to 

CO-28, "Exploded View"

.

• Rocker cover: Refer to 

EM-54, "Exploded View"

.

• Front cover, timing chain: Refer to 

EM-67, "Exploded View"

.

Valve collet

Valve spring retainer

Valve spring 
(with valve spring seat) (EXH)

Valve oil seal

Valve guide (EXH)

Valve seat (EXH)

Valve (EXH)

Valve (INT)

Valve seat (INT)

Cylinder head

Valve guide (INT)

Spark plug

Valve spring 
(with valve spring seat) (INT)

Comply with the installation procedure 
when tightening. Refer to 

EM-94

: Always replace after every disassembly.

: N·m (kg-m, ft-lb)

: Should be lubricated with oil.

JPBIA1753GB

EM-94

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

CYLINDER HEAD

• Camshaft: Refer to 

EM-80, "Exploded View"

.

4.

Remove cylinder head.
• Loosen cylinder head bolts in the order from 10 to 1 as shown

in the figure. 

• Using TORX socket (size: E18), loosen cylinder head bolts.

5.

Remove cylinder head gasket.

INSTALLATION

1.

Install cylinder head gasket.

2.

Install cylinder head, and tighten cylinder head bolts in the order
from 1 to 10 as shown in the figure with the following procedure.

CAUTION:

If cylinder head bolts are reused, check their outer diame-
ters before installation. Refer to 

EM-99, "Inspection"

.

a.

Apply new engine oil to threads and seating surface of mounting
bolts.

b.

Tighten all cylinder head bolts.

c.

Turn all cylinder head bolts 100 degrees clockwise (angle tightening).

CAUTION:

Check and confirm the tightening angle by using an angle
wrench [SST: KV10112100] 

 or protractor. Never judge by

visual inspection without the tool.

d.

Completely loosen.

CAUTION:

In this step, loosen cylinder head bolts in reverse order that
indicated in the figure.

e.

Tighten all cylinder head bolts.

f.

Turn all cylinder head bolts 95 degrees clockwise (angle tightening).

g.

Turn all cylinder head bolts 95 degrees clockwise again (angle tightening).

3.

Install in the reverse order of removal, for the rest of parts. 

Disassembly and Assembly

INFOID:0000000010783727

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.

: Engine front

PBIC3206J

: Engine front

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

: 0 N·m (0 kg-m, 0 ft-lb)

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

PBIC3206J

PBIC3208J

CYLINDER HEAD

EM-95

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

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3.

Remove valve collet. 
• Compress valve spring with the valve spring compressor [SST:

KV10116200] (A), the attachment [SST: KV10115900] (C), and
the adapter [SST: KV10109220] (B). Remove valve collet with
a magnet hand.

CAUTION:

• Be careful not to damage valve lifter holes.
• Fit the attachment [SST: KV10115900 (J-26336-20)] 

 in

thecenter of valve spring retainer 

 to press it.

4.

Remove valve spring retainer and valve spring (with valve spring seat).

CAUTION:

Never remove valve spring seat from valve spring.

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 a valve oil seal puller [SST:
KV10107902] .

7.

When 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-135, "Cylinder Head"

.

CAUTION:

Never bore excessively to prevent cylinder head from scratching.

8.

When valve guide must be replaced.

JPBIA0180ZZ

JPBIA4477ZZ

PBIC3210J

EM-96

< UNIT DISASSEMBLY AND ASSEMBLY >

[MR20DD]

CYLINDER HEAD

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 hammer and valve guide drift (com-
mercial service tool) (A).

CAUTION:

Cylinder head contains heat, wear protective equipment to
avoid getting burned.

ASSEMBLY

1.

When valve guide is removed, install it. 

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-135, "Cylinder Head"

.

JPBIA0185ZZ

PBIC3214J