Infiniti G35 (V35) Sedan. Manual - part 604

SPARK PLUG

EM-15

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SPARK PLUG

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove engine cover with power tool. Refer to 

EM-27, "Exploded View"

.

2.

Remove air cleaner case and air duct (RH and LH). Refer to 

EM-25, "Exploded View"

.

3.

Remove electric throttle control actuator. Refer to 

EM-30, "Exploded View"

.

4.

Remove ignition coil. Refer to 

EM-45, "Removal and Installation"

.

1.

PCV hose

2.

Clamp

3.

Ignition coil

4.

Spark plug

5.

PCV valve

6.

O-ring

7.

Rocker cover gasket (right bank)

8.

Rocker cover (right bank)

9.

O-ring

10.

Camshaft position sensor (PHASE) 
(bank 1)

11.

Exhaust valve timing control position 
sensor (bank 1)

12.

Camshaft position sensor (PHASE) 
(bank 2)

13.

Exhaust valve timing control position 
sensor (bank 2)

14.

Rocker cover gasket (left bank)

15. Rocker cover (left bank)

16.

PCV hose

17.

Oil catcher

18. Oil filler cap

19.

PCV hose

A.

To intake manifold collector

B.

Refer to 

EM-45

C.

Camshaft bracket side

D.

To air duct

Refer to 

GI-4, "Components"

 for symbol marks in the figure.

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EM-16

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SPARK PLUG

5.

Remove spark plug with a spark plug wrench (commercial ser-
vice tool).

INSTALLATION

Installation is the reverse order of removal.

Inspection

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INSPECTION AFTER REMOVAL

Use the standard type spark plug for normal condition.

CAUTION:

• Do not drop or shock spark plug.
• Do not use a wire brush for cleaning.
• If plug tip is covered with carbon, spark plug cleaner may be

used.

• Checking and adjusting plug gap is not required between

change intervals.

a

: 14 mm (0.55 in)

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Spark plug (Standard type)

: Refer to 

EM-142, "Spark Plug"

.

Cleaner air pressure:

Less than 588 kPa (6 kg/

cm

2

, 85 psi)

Cleaning time:

Less than 20 seconds

SMA773C

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CAMSHAFT VALVE CLEARANCE

EM-17

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CAMSHAFT VALVE CLEARANCE

Inspection and Adjustment

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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-45, "Removal and Installation"

.

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 cylinder

(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.

b.

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

: Engine front

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: Timing mark (grooved line without color)

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: Engine front

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Valve clearance

: Refer to 

EM-142, "Camshaft"

.

SEM139D

EM-18

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CAMSHAFT VALVE CLEARANCE

• 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 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

°

(b) counterclockwise

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

: Engine front

Measuring position [right bank (A)]

No. 1 CYL.

No. 3 CYL. 

No. 5 CYL.

No. 1 cylinder at com-

pression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [left bank (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 1 cylinder at com-

pression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

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