Infiniti G35 (V35). Manual - part 489

CAMSHAFT

EM-111

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Summary of the inspection items:

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

Valve Clearance

NBS002UT

INSPECTION

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
In cases of removing/installing or replacing camshaft and valve-
related parts, or of unusual engine conditions due to changes in
valve clearance (found malfunctions during stating, idling or causing
noise), perform inspection as follows:

1.

Remove rocker covers (right and left bank). Refer to 

EM-44, "ROCKER COVER"

 .

2.

Measure the valve clearance as follows:

a.

Set No. 1 cylinder at TDC of its compression stroke.

●

Rotate crankshaft pulley clockwise to align timing mark
(grooved line without color) with timing indicator.

●

Make sure that intake and exhaust cam nose on No. 1 cylin-
der (engine front side of right bank) are located as shown in
the figure.

●

If not, turn crankshaft one revolution (360 degrees) and align
as shown in the figure.

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

SEM713A

KBIA1717J

SEM418G

EM-112

CAMSHAFT

b.

Use a feeler gauge, measure the clearance between valve lifter
and camshaft.

Valve clearance:

Unit: mm (in)

*: Approximately 80

°

C (176

°

F)

●

By referring to the figure, measure the valve clearances at
locations marked “

×

” as shown in the table below (locations

indicated in the figure).

●

No. 1 cylinder at compression TDC

c.

Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 3 cylinder at
TDC of its compression stroke.

NOTE:

●

To align cylinder No.3 with the compression top dead center,
place matching marks (A) on the crankshaft pulley (1) side
and on the cylinder block side at a point 240

°

counterclock-

wise from the compression top dead center using the hex
head of the crankshaft pulley bolt as a guide.

SEM139D

Items

Cold

Hot * (reference data)

Intake

0.26 - 0.34 (0.010 - 0.013)

0.304 - 0.416 (0.012 - 0.016)

Exhaust

0.29 - 0.37 (0.011 - 0.015)

0.308 - 0.432 (0.012 - 0.017)

Measuring position (right bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 1 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (left bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 1 cylinder at 

compression TDC

INT

×

 

EXH

×

 

PBIC2054E

PBIC4628J

CAMSHAFT

EM-113

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●

By referring to the figure, measure the valve clearances at
locations marked “

×

” as shown in the table below (locations

indicated in the figure).

●

No. 3 cylinder at compression TDC

d.

Rotate crankshaft by 240 degrees clockwise (when viewed from engine front) to align No. 5 cylinder at
TDC of compression stroke.

NOTE:

●

To align cylinder No.5 with the compression top dead center,
place matching marks (A) on the crankshaft pulley (1) side
and on the cylinder block side at a point 240

°

counterclock-

wise from the compression top dead center using the hex
head of the crankshaft pulley bolt as a guide.

Measuring position (right bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 3 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (left bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 3 cylinder at 

compression TDC

INT

×

 

EXH

 

×

PBIC2055E

PBIC4628J

EM-114

CAMSHAFT

●

By referring to the figure, measure the valve clearances at
locations marked “

×

” as shown in the table below (locations

indicated in the figure).

●

No. 5 cylinder at compression TDC

3.

If the measured values are out of the standard, perform adjustment. Refer to 

EM-114, "ADJUSTMENT"

 .

ADJUSTMENT

1.

Measure the valve clearance. Refer to 

EM-111, "INSPECTION"

 .

2.

Remove camshaft. Refer to 

EM-101, "REMOVAL"

 .

3.

Remove valve lifters at the locations that are out of the standard.

4.

Measure the center thickness of removed valve lifters with a
micrometer.

5.

Use the equation below to calculate valve lifter thickness for replacement.

Measuring position (right bank)

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 5 cylinder at 

compression TDC

EXH

×

INT

×

Measuring position (left bank)

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 5 cylinder at 

compression TDC

INT

×

 

EXH

 

×

PBIC2056E

KBIA0057E

Valve lifter thickness calculation:

t = t

1

 + (C

1

 – C

2

 )

t

= Valve lifter thickness to be replaced

t

1

= Removed valve lifter thickness

C

1

= Measured valve clearance

C

2

= Standard valve clearance:

Intake

: 0.30 mm (0.012 in)*

Exhaust

: 0.33 mm (0.013 in)*

*: Approximately 20

°

C (68

°

F)