Mechanical Inspection: Compression
Check engine mechanical condition using 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. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate engine oiling system.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | 8.5:1 | |
| Compression Pressure (Minimum) | ||
| 850 GLT (B5254T Engine) | 184-219 psi (13-15 kg/cm2 ) | |
| 850 T-5 (B5234T Engine) | 156-184 psi (11-13 kg/cm2 ) | |