Test compression pressure with engine at normal operating temperature. Remove all spark plugs. Set throttle and choke valves wide open.
| Application | Compression Ratio |
|---|---|
| 2.8L | 8.9:1 |
| 3.0L | 9.0:1 |
| 3.8L (VIN 3 & 7) | 8.0:1 |
| 3.8L (VIN C) | 8.5:1 |
| 4.3L | 9.3:1 |
| Compression Pressure | 100 psi (7 kg/cm 2 ) min. |
| Maximum Variation Between Cylinders | 30% |
COMPRESSION SPECIFICATIONS