nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Engine Controls - Improved Driveability, Updates|Page 1805 > < Engine Controls - Improved Driveability, Updates
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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.

Engine Controls - Improved Driveability, Updates|Page 1805 > < Engine Controls - Improved Driveability, Updates