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.
ENGINE COMPRESSION (1)
| Application | Specification | ||||
|---|---|---|---|---|---|
| Compression Ratio | |||||
| GS-R | 10.0:1 | ||||
| Except GS-R | 9.2:1 | ||||
| Compression Pressure at 250 RPM | |||||
| Standard | |||||
| GS-R | 270 psi (19.0 kg/cm2 ) | ||||
| Except GS-R | 200 psi (14.0 kg/cm2 ) | ||||
| Minimum | 135 psi (9.5 kg/cm2 ) | ||||
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