Engine Compression: Notes
NOTE:
Prior to checking compression, be sure batteries are fully charged. When turning engine over during test, 6 "puffs" per cylinder should be used to obtain reading.
| Compression Ratio | ||
| 1.8L | 22.0:1 | |
| 4.3L | 21.6:1 | |
| 5.7L | 22.5:1 | |
| Compression Pressure | ||
| 1.8L | 370 psi (Minimum) | |
| 4.3L & 5.7L | 275 psi (Minimum) | |
| Max. Variation Between Cylinders | ||
| 1.8L. | 21 psi | |
| 4.3L & 5.7L | 30% | |