Mechanical Inspection: Compression
Check engine mechanical condition with a compression gauge, vacuum gauge or 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. 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 SPECIFICATIONS(1)
| Application | psi (kg/cm2 ) | |||
|---|---|---|---|---|
| Minimum Compression Pressure | ||||
| 2.2L & 2.5L | 100 (7.0) | |||
| 3.0L | 178 (12.5) | |||
| 3.3L | 100 (7.0) | |||
| 3.5L | 155-170 (10.9-12.0) | |||
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