Mechanical Inspection: Compression

Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. See engine analyzer instruction 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

Specification

Compression Ratio

8.9:1

Compression Pressure

psi (cm² )

Standard

199 (14.0)

Limit

⁽¹⁾ 170 (11.9)

⁽¹⁾	Maximum variation between cylinders is 14.2 psi (.9 kg/cm² ).