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Mechanical Inspection: Compression

Check engine mechanical condition using a compression gauge, vacuum gauge or an engine analyzer. See engine analyzer manual for specific instructions. Ensure engine is at normal operating temperature. Engine cranking speed must be at least 250 RPM during compression test.

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) psi (kg/cm2 )
Normal Compression Pressure
Esteem, Sidekick & X-90 199.0 psi (14.0 kg/cm2 )
Swift 192.0 psi (13.5 kg/cm2 )
Minimum Compression Pressure
Esteem & Swift 156.4 psi (11.0 kg/cm2 )
Sidekick & X-90 170 psi (11.9 kg/cm2 )
(1) Maximum variation between cylinders is 14.2 psi (.9 kg/cm2 ).
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