240SX L4-2389cc 2.4L SOHC MFI (KA24E) (1989)
Compression Measurement
Measurement of Compression Pressure
1.
Warm up engine.
2.
Turn ignition switch off.
3.
Disconnect fusible link for injectors.
4.
Remove all spark plugs.
5.
Disconnect distributor center cable.
6.
Attach a compression tester to No. 1 cylinder.
7.
Depress accelerator pedal fully to keep throttle valve wide open.
8.
Crank engine and record highest gauge indication.
9.
Repeat the measurement on each cylinder as shown above.
^
Always use a fully-charged battery to obtain specified engine revolution.
Compression pressure:
kPa (kg/sq.cm, psi)/rpm
Standard
1,206 (12.3, 175)/250
Minimum
1,010 (10.3, 146)/250
Difference limit between cylinders
98 (1.0, 14)/250
10.
If cylinder compression in one or more cylinders is low, pour a small amount of engine oil into cylinders through spark plug holes and retest
compression.