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

Application

psi (kg/cm² )

Normal Compression Pressure

⁽¹⁾ *

Minimum Compression Pressure

100 (7.0)

Maximum Variation Between Cylinders

⁽²⁾ *

⁽¹⁾	Information not available at time of publication.

⁽²⁾	Maximum variation between cylinders is 25 percent.