Infiniti G35 (V35). Manual - part 492

CYLINDER HEAD

EM-123

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e.

Turn all bolts 90 to 95 degrees clockwise [target: 90 degrees
(angle tightening)].

CAUTION:

Check the tightening angle by using angle wrench (SST).
Avoid judgment by visual inspection without tool.

●

Check tightening angle indicated on angle wrench indicator
plate.

f.

Turn all bolts 90 to 95 degrees clockwise again [target: 90
degrees (angle tightening)].

4.

After installing cylinder head, measure the distance between
front end faces of cylinder block and cylinder head (left and right
banks).

●

If measured value is out of the standard, re-install cylinder
head.

5.

Install in the reverse order of removal after this step.

INSPECTION AFTER INSTALLATION
Inspection for Leaks

The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

●

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to 

MA-10, "RECOMMENDED FLUIDS AND LUBRICANTS"

 .

●

Use procedure below to check for fuel leakage.

–

Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.

–

Start engine. With engine speed increased, check again for fuel leakage at connection points.

●

Run engine to check for unusual noise and vibration.

●

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

●

Bleed air from lines and hoses of applicable lines, such as in cooling system.

●

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.

Summary of the inspection items:

* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

PBIC0888E

Standard

: 14.1 - 14.9 mm (0.555 - 0.587 in) 

EMQ0662D

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluid*

Level

Leakage

Level

Fuel

Leakage

Leakage

Leakage

Exhaust gases

—

Leakage

—

EM-124

CYLINDER HEAD

Components

NBS002V0

Disassembly and Assembly

NBS002V1

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 valve spring compressor, attach-
ment and adapter (SST). Remove valve collet with 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.

1.

Valve lifter

2.

Valve collet

3.

Valve spring retainer

4.

Valve spring

5.

Valve oil seal

6.

Valve spring seat

7.

Valve guide

8.

Spark plug

9.

Spark plug tube

10. Cylinder head (right bank)

11.

Valve seat

12. Valve (EXH)

13.  Valve (INT)

14. Cylinder head (left bank)

PBIC2637E

PBIC1803E

CYLINDER HEAD

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6.

Remove valve oil seal using valve oil seal puller (SST).

7.

If valve seat must be replaced, refer to 

EM-129, "VALVE SEAT REPLACEMENT"

 .

8.

If valve guide must be replaced, refer to 

EM-127, "VALVE GUIDE REPLACEMENT"

 .

9.

Remove spark plug tube, as necessary.

●

Using 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. Do not remove it unless
absolutely necessary.

ASSEMBLY

1.

When valve guide is removed, install it. Refer to 

EM-127, "VALVE GUIDE REPLACEMENT"

 .

2.

When valve seat is removed, install it. Refer to 

EM-129, "VALVE SEAT REPLACEMENT"

 .

3.

Install valve oil seal.

●

Apply new engine oil on valve oil seal joint and seal lip.

●

Install with valve oil seal drift (SST) to match dimension in the
figure.

4.

Install valve spring seat.

5.

Install valve.

NOTE:
Larger diameter valves are for intake side.

6.

Install valve spring (uneven pitch type).

●

Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).

7.

Install valve spring retainer.

PBIC0884E

Height “H” (Without valve spring seat installed)

Intake and exhaust

: 14.3 - 14.9 mm (0.563 - 0.587 in)

PBIC2769E

Paint mark collar

M/T models

: Purple

A/T models

: Blue

SEM085D

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CYLINDER HEAD

8.

Install valve collet.

●

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with magnet
hand.

CAUTION:

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

●

Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.

9.

Install valve lifter.

●

Install it in the original position.

10. Install spark plug tube.

●

Press-fit spark plug tube as follows:

a.

Remove old high strength locking sealant adhering to cylinder head mounting hole.

b.

Apply high strength locking sealant to area within approximately 12 mm (0.47 in) from edge of spark plug
tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to 

GI-46, "RECOMMENDED

CHEMICAL PRODUCTS AND SEALANTS"

 .

c.

Using drift, press-fit spark plug tube so that its height “H” is as
specified in the figure.

CAUTION:

●

When press-fitting, take care not to deform spark plug
tube.

●

After press-fitting, wipe off high strength locking sealant
protruding onto cylinder-head upper face.

11. Install spark plug with spark plug wrench (commercial service tool).

Inspection After Disassembly

NBS002V2

VALVE DIMENSIONS

●

Check dimensions of each valve. For dimensions, refer to 

EM-

171, "Valve Dimensions"

 .

●

If dimensions are out of the standard, replace valve and check
valve seat contact. Refer to 

EM-129, "VALVE SEAT CONTACT"

.

PBIC1803E

Standard press-fit height “H”

: 38.1 - 39.1 mm (1.500 - 1.539 in)

PBIC2638E

SEM188A