Nissan Versa Sedan. Manual — part 369
CAMSHAFT VALVE CLEARANCE
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< BASIC INSPECTION >
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• Refer to the figure. Using a feeler gauge, measure the valve
clearances at locations marked “
×” in the table below [also
shown with black arrow (
)].
c. Set No. 4 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.
• Refer to the figure. Using a feeler gauge, measure the valve
clearances at locations marked “
×” in the table below [also
shown with black arrow (
)].
3. If out of the specifications, adjust as necessary. Refer to “ADJUSTMENT”.
ADJUSTMENT
NOTE:
Proper valve clearance is obtained by selecting the correct valve lifter head thickness.
1. Remove camshaft. Refer to
2. Remove valve lifters from the locations that are out of specification.
(A)
: No. 1 cylinder
(B)
: No. 2 cylinder
(C)
: No. 3 cylinder
(D)
: No. 4 cylinder
JPBIA4117ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 4 CYL.
No. 1 cylinder at compression TDC
EXH
×
×
INT
×
×
(B)
: White paint mark (Not use for service)
PBIC3673E
(A)
: No. 1 cylinder
(B)
: No. 2 cylinder
(C)
: No. 3 cylinder
(D)
: No. 4 cylinder
JPBIA4118ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 4 CYL.
No. 4 cylinder at compression TDC
EXH
×
×
INT
×
×
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< BASIC INSPECTION >
[HR16DE]
CAMSHAFT VALVE CLEARANCE
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 under side of the lifter.
NOTE:
Available thickness of valve lifter: 26 sizes range 3.00 to 3.50
mm (0.1181 to 0.1378 in) in increments of 0.02 mm (0.0008 in)
when manufactured at factory. Refer to
.
• Stamp mark “302” indicates 3.02 mm (0.1189 in) in thickness.
5. Install the correct thickness valve lifter.
6. Install camshaft. Refer to
.
7. Install timing chain and related parts. Refer to
.
8. Manually rotate crankshaft pulley a few rotations.
9. Check that valve clearances are within specification. 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)
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COMPRESSION PRESSURE
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< BASIC INSPECTION >
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COMPRESSION PRESSURE
Inspection
INFOID:0000000009266633
1. Warm up engine and then turn it off.
2. Release fuel pressure. Refer to
3. Remove ignition coil and spark plug from each cylinder. Refer to
4. Connect engine tachometer (not required in use of CONSULT).
5. Install compression gauge (B) with an adapter (A) (commercial
service tool) onto spark plug hole.
• Use an adapter with a diameter (a) smaller than 20 mm (0.79
in). Otherwise, it may be caught by cylinder head during
removal.
6. With accelerator pedal fully depressed, turn ignition switch to START for cranking. When the gauge
pointer stabilizes, read the compression pressure and the engine rpm. Perform these steps to check each
cylinder.
CAUTION:
Always use a fully charged battery to obtain the specified engine speed.
• If the engine speed is out of the specified range, check the battery. Check the engine speed again with a
fully charged battery.
• If some cylinders have low compression pressure, pour a small amount of engine oil into the spark plug
hole to recheck the compression.
- If the added engine oil improves the compression, the piston rings may be worn or damaged. Check the
piston rings and replace if necessary.
- If the compression pressure remains low despite the addition of engine oil, the valves may be malfunc-
tioning. Check the valves for damage. Replace the valve or valve seat as necessary.
• If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil the head gasket may be leaking, or valves in adjacent cylinders
may be damaged. Inspect and repair as required.
• If the compression pressure is below the minimum value, check the valve clearances and parts associ-
ated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head,
cylinder head gasket). After repairing, measure the compression pressure again.
7. After inspection is completed, install removed parts.
8. Start the engine, and ensure that the engine runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to
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(a)
: Less than 20 mm (0.79 in)
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Compression pressure : Refer to
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< SYMPTOM DIAGNOSIS >
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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH troubleshooting Chart
INFOID:0000000009266634
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
JPBIA4739GB
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