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EM-98
[VQ35DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
CYLINDER HEAD PFP:11041
On-Vehicle Service ABS004X7
CHECKING COMPRESSION PRESSURE
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-51, "
FUEL PRESSURE RELEASE" .
3. Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.
4. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
5. Remove ignition coil and spark plug from each cylinder. Refer to EM-42, "
IGNITION COIL" and EM-43,
"SPARK PLUG (PLATINUM-TIPPED TYPE)" .
6. Connect engine tachometer (not required in use of CONSULT-ll).
7. Install compression gauge with compression gauge adapter
(commercial service tool) onto spark plug hole.
● Use compression gauge adapter 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.
8. With accelerator pedal fully depressed, turn ignition switch to
“START” for cranking. When gauge pointer stabilizes, read the
compression pressure and engine rpm. Perform these steps to
check each cylinder.
Compression pressure:
Unit: kPa (kg/cm
2
, psi) /rpm
CAUTION:
Always use a fully changed battery to obtain specified engine speed.
● If engine speed is out of specified range, check battery liquid for proper gravity. Check engine speed
again with normal battery gravity.
SBIA0466E
PBIC0900E
SBIA0533E
Standard Minimum Deference limit between cylinders
1,275 (13.0, 185) / 300 981 (10.0, 142) / 300 98 (1.0, 14) / 300
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