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. 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.
COMPRESSION SPECIFICATIONS
| Application | psi (kg/cm2 ) |
|---|---|
| Normal Compression Pressure | 185 psi (13.0 kg/cm2 ) |
| Minimum Compression Pressure | 142 psi (10.0 kg/cm2 ) |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm2 ) |