Engine Compression
Warm engine to normal operating temperature. Disconnect single wire from negative terminal of ignition coil(s). 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(s) negative terminal may cause damage to ECU.
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| C70, S70 & V70 | |||
| Non-Turbo | 10.3:1 | ||
| High Pressure Turbo | 8.5:1 | ||
| Low Pressure Turbo | 9.0:1 | ||
| S90 & V90 | 10.7:1 | ||
| Compression Pressure (Minimum) | |||
| C70, S70 & V70 | |||
| Non-Turbo | 184-219 psi (13-15 kg/cm2 ) | ||
| Turbo | 156-184 psi (11-13 kg/cm2 ) | ||
| S90 & V90 | 170-199 psi (12-14 kg/cm2 ) | ||