Engine Compression
Warm engine to normal operating temperature. Disconnect single wire from negative terminal of ignition coil. Check compression with all spark plugs removed, throttle valve wide open and at normal cranking speed (250-300 RPM).
CAUTION:
Failure to disconnect ignition coil negative terminal may cause damage to ignition system control unit(s).
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| 240 Series | 9.8:1 | ||
| 740 Series | |||
| Except Turbo | 9.8:1 | ||
| Turbo | 8.7:1 | ||
| 940 GLE | 10.0:1 | ||
| 940 SE, 940 Turbo | 8.7:1 | ||
| Compression Pressure (Minimum) | 128 psi (9 kg/cm2 ) | ||