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.
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| Camry | 9.3:1 | ||
| Celica | |||
| Non-Turbo | 9.5:1 | ||
| Turbo | 8.8:1 | ||
| Corolla | |||
| 4A-FE | 9.5:1 | ||
| 4A-GE | 10.3:1 | ||
| MR2 | |||
| 2.0L | 8.8:1 | ||
| 2.2L | 9.5:1 | ||
| Previa | NA | ||
| Pickup, Tercel & 4Runner | 9.3:1 | ||
| Normal Compression Pressure | |||
| Celica Turbo | 164 psi (11.5 kg/cm2 ) | ||
| Corolla | 191 psi (13.4 kg/cm2 ) | ||
| MR2 | |||
| 2.0L | 164 psi (11.5 kg/cm2 ) | ||
| 2.2L | 178 psi (12.5 kg/cm2 ) | ||
| Pickup & 4Runner | 171 psi (12.0 kg/cm2 ) | ||
| Tercel | 185 psi (13.0 kg/cm2 ) | ||
| All Others | 178 psi (12.5 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| Celica Turbo | 164 psi (11.5 kg/cm2 ) | ||
| MR2 2.0L & Previa | 128 psi (9.0 kg/cm2 ) | ||
| All Others | 142 psi (10.0 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | . 14 psi (1.0 kg/cm2 ) | ||