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. 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.
6-CYLINDER COMPRESSION SPECIFICATIONS
| Application | psi (kg/cm2 ) | ||
|---|---|---|---|
| Normal Compression Pressure | |||
| Cressida | 171 (12.0) | ||
| Land Cruiser | 149 (10.5) | ||
| Supra | |||
| Turbo | 142 (10.0) | ||
| Non-Turbo | 171 (12.0) | ||
| Minimum Compression Pressure | |||
| Cressida & Supra | 128 (9.0) | ||
| Land Cruiser | 114 (8.0) | ||
| Maximum Variation Between Cylinders | |||
| Cressida & Supra | 14 (1.0) | ||
| Land Cruiser | 7 (.5) | ||