Engine Compression
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application | Specification | |||||
|---|---|---|---|---|---|---|
| Compression Ratio | ||||||
| 2.5L | 8.9:1 | |||||
| 3.0L | 8.85:1 | |||||
| 3.3L | 8.9:1 | |||||
| 3.9L | 9.1:1 | |||||
| 5.2L | 9.1:1 | |||||
| 5.9L | 8.1:1 | |||||
| Compression Pressure | ||||||
| 3.0L | (1) 178 psi (12.5 kg/cm2 ) | |||||
| All Other Engines | (2) 100 psi (7.0 kg/cm2 ) | |||||
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