Mechanical Inspection: Compression

Download the full database via torrent (~1.1 TB) | Download Brad's custom LEMON patches

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 on fuel injected vehicles. Use a remote starter to crank engine. 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.

ENGINE COMPRESSION SPECIFICATIONS

Application

Specification

3.0L

⁽¹⁾ 178 psi (12.5 kg/cm² )

⁽¹⁾	Engine speed at 250-400 RPM.