Nissan Murano Z51. Manual - part 660

EM-112

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER HEAD

2.

Remove cylinder head bolts in the reverse order as shown in the
figure with cylinder head bolt wrench (commercial service tool)
and power tool to remove cylinder heads (bank 1 and bank 2).

3.

Remove cylinder head gaskets.

INSTALLATION

1.

Install new cylinder head gaskets.

2.

Turn crankshaft until No. 1 piston is set at TDC.
• Crankshaft key (1) should line up with the bank 1 cylinder cen-

ter line as shown in the figure.

A

:  Bank  1

B

:  Bank  2

: Engine front

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: Bank 1 side

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CYLINDER HEAD

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< UNIT DISASSEMBLY AND ASSEMBLY >

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3.

Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown in the figure with cylin-
der head bolts wrench (commercial service tool).

CAUTION:

• If cylinder head bolts reused, check their outer diameters

before installation. Refer to 

EM-118, "Inspection"

.

• Before installing cylinder head, inspect cylinder head dis-

tortion. Refer to 

EM-118, "Inspection"

.

a.

Apply new engine oil to threads and seat surfaces of cylinder
head bolts.

b.

Tighten all cylinder head bolts.

c.

Completely loosen all cylinder head bolts.

CAUTION:

In step “c”, loosen bolts in the reverse order of that indicated in the figure.

d.

Tighten all cylinder head bolts.

e.

Turn all cylinder head bolts 103 degrees clockwise (angle tightening).

CAUTION:

Check the tightening angle by using the angle wrench [SST:
KV10112100 (BT8653-A)] (A). Avoid judgment by visual
inspection without.
• Check tightening angle indicated on the angle wrench indica-

tor plate.

f.

Turn all cylinder head bolts 103 degrees clockwise again (angle
tightening).

4.

After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (bank 1 and bank
2).

• If measured value is out of the standard, reinstall cylinder

head.

5.

Install in the reverse order of removal after this step.

A

:  Bank  1

B

:  Bank  2

: Engine front

: 98.1 N·m (10 kg-m, 72 ft-lb)

: 0 N·m (0 kg-m, 0 ft-lb)

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

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Standard

: 14.1 - 14.9 mm (0.555 - 0.587 in) 

EMQ0662D

EM-114

< UNIT DISASSEMBLY AND ASSEMBLY >

CYLINDER HEAD

Disassembly and Assembly

INFOID:0000000005515969

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.

3.

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

KV10116200 (J-26336-A)] (A), the attachment [SST:
KV10115900 (J-26336-20)] (C) and the adapter [SST:
KV10109220 ( — )] (B). Remove valve collet with a magnet
hand.

CAUTION:

When working, take care not to damage valve lifter holes.

4.

Remove valve spring retainer, valve spring and valve spring seat.

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 the valve oil seal puller [SST:
KV10107902 (J-38959)] (A).

7.

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-148, "Cylinder Head"

.

CAUTION:

Prevent to scratch cylinder head by excessive boring.

8.

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 (A).

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CYLINDER HEAD

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b.

Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) pressure] or a hammer and the valve guide drift
(commercial service tool).

WARNING:

Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

9.

Remove spark plug tube if necessary.
• Using a pliers, pull spark plug tube out of cylinder head. 

CAUTION:

• Take care not to damage cylinder head.
• Once removed, spark plug tube will be deformed and cannot be reused. Never remove it unless

absolutely necessary.

ASSEMBLY

1.

If valve guide is removed in step 8 (DISASSEMBLY), install it. 
Replace with oversized [0.2 mm (0.008 in)] valve guide.

a.

Using the valve guide reamer (commercial service tool) (A),
ream cylinder head valve guide hole.

b.

Heat cylinder head to 110 to 130

°

C (230 to 266

°

F) by soaking in

heated oil (A).

c.

Using the valve guide drift (commercial service tool), press valve
guide from camshaft side to the dimensions as in the figure.

WARNING:

Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

SEM931C

Valve guide hole diameter (for service parts):

Intake and exhaust

: Refer to 

EM-148, "Cylinder Head"

.

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Projection (A)

Intake and exhaust

: Refer to 

EM-148, "Cylinder Head"

.

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