Nissan Cube. Instruction — 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
.
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
C.
To intake manifold
: Always replace after every disassembly.
PBIC4366J
a
: 14 mm (0.55 in)
JPBIA0030ZZ
SPARK PLUG
EM-17
< 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
.
Spark plug (Standard type)
: Refer to
.
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
.
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
.
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
< PERIODIC MAINTENANCE >
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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
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
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