Nissan Quest E52. Manual - part 567

SPARK PLUG

EM-17

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2.

Remove air cleaner cases (upper and lower) and air duct assembly. Refer to 

EM-26, "Exploded View"

.

3.

Remove intake manifold collector. Refer to 

EM-28, "Exploded View"

.

4.

Remove ignition coil. Refer to 

EM-52, "Exploded View"

.

5.

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

INSTALLATION

Install in the reverse order of removal.

Inspection

INFOID:0000000009652753

INSPECTION AFTER REMOVAL

Use the standard type spark plug for normal condition.

CAUTION:

• Never drop or shock spark plug.
• Never use a wire brush for cleaning.
• If plug tip is covered with carbon, spark plug cleaner may be

used.

• Spark plug gap adjustment is not required between replace-

ment intervals.

• Measure spark plug gap. When it exceeds the limit, replace

spark plug even if it is within the specified replacement mile-
age. Refer to 

EM-129, "Spark Plug"

.

a

: 14 mm (0.55 in)

JPBIA0030ZZ

Spark plug (Standard type)

: Refer to 

EM-129, "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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EM-18

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CAMSHAFT VALVE CLEARANCE

CAMSHAFT VALVE CLEARANCE

Inspection and Adjustment

INFOID:0000000009652754

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 (bank 1 and bank 2). Refer to 

EM-52, "Exploded View"

.

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.

• Check that intake and exhaust cam nose on No. 1 cylinder

(engine front side of bank 1) are located as shown in the fig-
ure.

• 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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SEM727G

: Engine front

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Valve clearance

: Refer to 

EM-129, "Camshaft"

.

SEM139D

CAMSHAFT VALVE CLEARANCE

EM-19

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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. 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:
Mark (A) a position 240 degrees from a corner of the hexagonal
part of crankshaft pulley mounting bolt as shown in the figure.
Use the hexagonal part as a guide. 

: Engine front

Measuring position [bank 1 (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 [bank 2 (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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: Crankshaft pulley

PBIC4628J

EM-20

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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. 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:
Mark (A) a position 240 degrees from a corner of the hexagonal
part of crankshaft pulley mounting bolt as shown in the figure.
Use the hexagonal part as a guide. 

: Engine front

Measuring position [bank 1 (A)]

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 3 cylinder at com-

pression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [bank 2 (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 3 cylinder at com-

pression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

JPBIA0167ZZ

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: Crankshaft pulley

PBIC4628J