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.
COMPRESSION SPECIFICATION
| Application | psi (kg/cm(2 ) | Compression Ratio |
|---|---|---|
| Cabriolet | 131-174 (9.2-12.2) | 10.0:1 |
| Corrado SLC | 157-186 (11.0-13.0) | 10.0:1 |
| EuroVan | 128-170 (9.0-12.0) | 8.5:1 |
| Fox | 128-170 (9.0-12.0) | 9.0:1 |
| Passat GL (2.0L) | 142-186 (10.0-13.0) | 10.8:1 |
| Passat GLX (2.8L) | 142-186 (10.0-13.0) | 10.0:1 |