Engine Compression
Test compression with engine at normal operating temperature, spark plugs removed, throttle valve wide open and engine at cranking speed (300 RPM).
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| I-Mark | |||
| 1.5L | 9.6:1 | ||
| 1.5L Turbo | 8.0:1 | ||
| Impulse | |||
| 2.0L Turbo | 7.9:1 | ||
| 2.3L | 8.5:1 | ||
| Pickup | |||
| 2.3L | 8.5:1 | ||
| 2.6L | 8.3:1 | ||
| Trooper II 2.6L | 8.3:1 | ||
| Compression Pressure | |||
| I-Mark | |||
| Non-Turbo | 178 psi (12.5kg/cm2 ) | ||
| Turbo | 171 psi (12 kg/cm2 ) | ||
| Impulse | 171 psi (12 kg/cm2 ) | ||
| Pickup & Trooper II | 171 psi (12 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| I-Mark & Impulse | 128 psi (8.8 kg/cm2 ) | ||
| I-Mark, Pickup & Trooper II | 120 psi (8.4 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm2 ) | ||