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.
COMPRESSION SPECIFICATIONS(1)
| Application | psi (kg/cm2 ) | ||
|---|---|---|---|
| Normal Compression Pressure | 185 (13.0) | ||
| Minimum Compression Pressure | 139 (9.8) | ||
| Maximum Variation Between Cylinders | 14 (.9) | ||
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