Mechanical Inspection: Compression
Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. See engine analyzer manual for specific instructions.
WARNING:
DO NOT
use ignition switch during compression tests on fuel injected vehicles. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate the engine's oiling system.
ENGINE COMPRESSION
| Application | psi (kg/cm2 ) | ||
|---|---|---|---|
| Normal Compression Pressure | |||
| 1.8L | |||
| Except Corrado | 131-174 (9-12) | ||
| Corrado | 116-174 (8-12) | ||
| 2.0L & 2.1L | 145-189 (10-13) | ||
| Minimum Compression Pressure | |||
| 1.8L | |||
| Except Corrado & Fox | 109 (8) | ||
| Corrado | 87 (6) | ||
| Fox | 102 (7) | ||
| 2.0L | 109 (8) | ||
| 2.1L | 116 (8) | ||
| Maximum Variation Between Cylinders (All Models) | 44 (3) | ||