2003 NISSAN X-TRAIL Service Repair Manual

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Page 113 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual CAMSHAFT
EM-61
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e. Tighten mounting bolts in numerical order as shown in the fig-
ure.
10. Inspect and adjust valve clearance. Refer to EM-61, "
Valve Clearance" .
11.

Page 114 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-62
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CAMSHAFT

Use a feeler gauge, measure clearance between valve lifter
and camshaft.
*: Reference data at approximately 20°C (68°F)
CAUTION:
If inspection was performed with cold engine,

Page 115 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual CAMSHAFT
EM-63
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Thickness of new valve lifter can be identified by stamp mark
on the reverse side (inside the cylinder).
Stamp mark “696” indicates 6.96 mm (0.2740

Page 116 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-64
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OIL SEAL

OIL SEALPFP:12279
Removal and Installation of Valve Oil SealEBS00KNM
REMOVAL
1. Remove camshafts. Refer to EM-53, "CAMSHAFT" .
2. Remove valve lifters. Refer to EM-53, "
CAMSHAFT

Page 117 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual OIL SEAL
EM-65
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Drive belt; Refer to EM-13, "DRIVE BELTS" .
Crankshaft pulley; Refer to EM-44, "TIMING CHAIN" .
2. Remove front oil seal with a suitable tool.
CAUTION

Page 118 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-66
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OIL SEAL

2. Install rear oil seal so that each seal lip is oriented as shown in
the figure.
Press in rear oil seal to the position as shown in the figure.
Press-fit rear oil seal with a

Page 119 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual CYLINDER HEAD
EM-67
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CYLINDER HEADPFP:11041
On-Vehicle ServiceEBS00KNP
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressu

CYLINDER HEAD
EM-67
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CYLINDER HEADPFP:11041
On-Vehicle ServiceEBS00KNP
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure by “Without CONSULT-II”. Refer to EC-48, "
FUEL PRESSURE RELEASE" (WITH
EURO-OBD) or EC-510, "
FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
Leave fuel pump fuse disconnecting to avoid fuel injection during measurement.
3. Remove ignition coil and spark plug from each cylinder. Refer to EM-29, "
IGNITION COIL" and EM-30,
"SPARK PLUG" .
4. Connect engine tachometer (not required in use of CONSULT-II).
5. Install compression tester with adapter onto spark plug hole.
Use compression gauge whose picking up end inserted to
spark plug hole is smaller than 20 mm (0.79 in) in diameter.
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 engine rpm. Perform these steps to check each cyl-
inder.
Compression pressure:
Unit: kPa (bar, kg/cm2 , psi) /rpm
CAUTION:
Always use a fully changed battery to obtain specified engine speed.
If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.
If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (Valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure the compression pressure again.
If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check
piston rings and replace if necessary.
KBIA0130E
SBIA0533E
Engine type Standard Minimum Differential limit between cylinders
QR20DE 1,190 (11.9, 12.1, 173) / 250 990 (9.9, 10.1, 144) / 250
100 (1.0, 1.0, 14) / 250
QR25DE 1,250 (12.5, 12.8, 181) / 250 1,060 (10.6, 10.8, 154) / 250

Page 120 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EM-68
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CYLINDER HEAD

–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat

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