Mechanical Inspection: Compression
Check engine mechanical condition using 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. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate engine oiling system.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 2.0L | 9.0:1 | |
| 3.0L | 8.9:1 | |
| Compression Pressure | ||
| 2.0L | 171 psi (12.0 kg/cm2 ) | |
| 3.0L | 173 psi (12.2 kg/cm2 ) | |
| Max. Variation Between Cylinders All Models | 14 psi (1.0 kg/cm2 ) | |