Check engine compression with engine at normal operating temperature, all spark plugs removed and throttle wide open.
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| 3.1L | 8.8:1 | ||
| 3.3L | 9.0:1 | ||
| 3.4L | |||
| VIN S | 9.0:1 | ||
| VIN X | 9.3:1 | ||
| 3.8L | |||
| VIN L | 9.0:1 | ||
| VIN 1 | 8.5:1 | ||
| 4.3L | 9.3:1 | ||
| Normal Compression Pressure | (1) | ||
| Minimum Compression Pressure | (1) | ||
| (1) Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7 kg/cm 2 ). | |||
| (1) | Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7 kg/cm 2 ). |
COMPRESSION SPECIFICATIONS