Nissan March K13. Instruction — part 269
EM-10
< PREPARATION >
[HR12DE]
PREPARATION
Instruction lift table caddy
Removing and installing engine
Tube presser
Pressing the tube of liquid gasket
Tool name
Description
ZZA1210D
S-NT052
CAMSHAFT VALVE CLEARANCE
EM-11
< BASIC INSPECTION >
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BASIC INSPECTION
CAMSHAFT VALVE CLEARANCE
Inspection and Adjustment
INFOID:0000000005988165
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-41, "Removal and Installation"
.
2.
Measure the valve clearance with the following procedure:
a.
Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley (2) clockwise and align TDC mark (no
paint) (A) to timing indicator (1) 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.
B : White paint mark (Not use for service)
PBIC3673E
1
: Camshaft (INT)
2
: Camshaft (EXH)
: Engine front
JPBIA3433ZZ
Valve clearance
: Refer to
.
KBIA3348J
EM-12
< BASIC INSPECTION >
[HR12DE]
CAMSHAFT VALVE CLEARANCE
• 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.
Set No. 3 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley (2) one revolution (360 degrees) and
align TDC mark (no paint) (A) to timing indicator (1) 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.
A
: No. 1 cylinder at compression TDC
: Engine front
JPBIA3434ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 1 cylinder at compression TDC
EXH
×
×
INT
×
×
B
: White paint mark (Not use for service)
PBIC3673E
A
: No. 3 cylinder at compression TDC
: Engine front
JPBIA3435ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 3 cylinder at compression TDC
EXH
×
INT
×
CAMSHAFT VALVE CLEARANCE
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< BASIC INSPECTION >
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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.
• Thickness of new valve lifter (B) can be identified by stamp
mark (A) on the reverse side (inside the cylinder).
• Stamp mark “302” indicates 3.02 mm (0.1189 in) in thickness.
NOTE:
Available thickness of valve lifter: 26 sizes range 3.00 to 3.50 mm (0.1181 to 0.1378 in) in steps of 0.02
mm (0.0008 in) (when manufactured at factory). Refer to
.
5.
Install the selected valve lifter.
6.
Install camshaft. Refer to
.
7.
Install timing chain and related parts. Refer to
.
8.
Instructionly rotate crankshaft pulley a few rotations.
9.
Check that the valve clearances is within the standard. Refer to “INSPECTION”.
10. Install remaining parts in the reverse order of removal.
11. Warm up the engine, and check for unusual noise and vibration.
PBIC3195J
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)
PBIC3196J
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