Mechanical Inspection: Compression

Check engine mechanical condition using 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

⁽¹⁾ Specification

Compression Ratio

9.5:1

Compression Pressure

Standard

199 psi (14.0 kg/cm² )

Limit

⁽²⁾ 156 psi (10.9 kg/cm² )

⁽¹⁾	Checked at 400 RPM.

⁽²⁾	Maximum variation between cylinders is 14.2 psi (.9 kg/cm² ).