Nissan Cube. Manual - part 403

EM-16

< PERIODIC MAINTENANCE >

SPARK PLUG

SPARK PLUG

Exploded View

INFOID:0000000009944920

Removal and Installation

INFOID:0000000009944921

REMOVAL

1.

Remove ignition coil. Refer to 

EM-40, "Exploded View"

.

2.

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

CAUTION:

Never drop or shock spark plug.

INSTALLATION

1.

PCV hose

2.

Rocker cover

3.

Spark plug

4.

Ignition coil

5.

PCV hose

6.

PCV valve

7.

O-ring

8.

Rocker cover gasket

A.

To air duct assembly

B.

Comply with the assembly procedure 
when tightening. Refer to 

EM-40

C.

To intake manifold

: Always replace after every disassembly.

PBIC4366J

a

: 14 mm (0.55 in)

JPBIA0030ZZ

SPARK PLUG

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< PERIODIC MAINTENANCE >

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Install in the reverse order of removal.

Inspection

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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 with in the specified replacement mile-
age. Refer to 

EM-113, "Spark Plug"

.

Spark plug (Standard type)

: Refer to 

EM-113, "Spark Plug"

.

Cleaner air pressure

: Less than 588 kPa (6 kg/cm

2

, 

85 psi)

Cleaning time

: Less than 20 seconds

SMA773C

JPBIA0031ZZ

EM-18

< PERIODIC MAINTENANCE >

CAMSHAFT VALVE CLEARANCE

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. 

1.

Remove rocker cover. Refer to 

EM-40, "Exploded View"

.

2.

Measure the valve clearance with the following procedure:

a.

Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley (1) clockwise and align TDC mark (no

paint) (B) to timing indicator (A) on front cover.

• At the same time, check that both intake and exhaust cam

noses of No. 1 cylinder face inside (

) as shown in the figure.

• If they do not face inside, rotate crankshaft pulley once more

(360 degrees) and align as shown in the figure.

b.

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

• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below [locations

indicated with black arrow (

) in the figure] with a feeler

gauge.

C : White paint mark (Not use for service)

PBIC3960E

1

: Camshaft (INT)

2

: Camshaft (EXH)

: Engine front

PBIC3359J

Valve clearance

: Refer to 

EM-114, "Camshaft"

.

PBIC3192J

A

: Exhaust side

B

: No. 1 cylinder

C

: No. 2 cylinder

D

: No. 3 cylinder

E

: No. 4 cylinder

PBIC3193J

CAMSHAFT VALVE CLEARANCE

EM-19

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c.

Set No. 4 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley (1) one revolution (360 degrees) and

align TDC mark (no paint) (B) to timing indicator (A) on front
cover. 

• By referring to the figure, measure the valve clearance at loca-

tions marked “

×

” as shown in the table below [locations indi-

cated with black arrow (

) in the figure] with a feeler gauge. 

3.

If out of standard, perform adjustment. Refer to “ADJUSTMENT”.

ADJUSTMENT

• Perform adjustment depending on selected head thickness of valve lifter.
1.

Remove camshaft. Refer to 

EM-53, "Exploded View"

.

2.

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

3.

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

4.

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

F

: Intake side

: Engine front

Measuring position

No. 1 CYL.

No. 2 CYL.

No. 3 CYL.

No. 4 CYL.

No. 1 cylinder at compression TDC

EXH

×

×

INT

×

×

C : White paint mark (Not use for service)

PBIC3960E

A

: Exhaust side

B

: No. 1 cylinder

C

: No. 2 cylinder

D

: No. 3 cylinder

E

: No. 4 cylinder

F

: Intake side

: Engine front

PBIC3194J

Measuring position

No. 1 CYL.

No. 2 CYL.

No. 3 CYL.

No. 4 CYL.

No. 4 cylinder at compression TDC

EXH

×

×

INT

×

×

PBIC3195J