Engine Compression
Test compression with all spark plugs removed and engine at normal operating temperature. Crank engine through at least 5 compression strokes before recording reading.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 5.0L MPFI | 9.0:1 | |
| 5.8L 4-Bbl. | 8.3:1 | |
| 7.5L 4-Bbl. | 8.0:1 | |
| Max. Variation Between Cylinders | Less than 25% | |