Mechanical Inspection: Compression
Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. If compression gauge is used, see COMPRESSION SPECIFICATIONS
table. Ensure engine cranking speed is about 300 RPM. If vacuum gauge is used, check for low or unstable vacuum condition. If engine analyzer is used, see manufacturer's manual for specific instructions.
COMPRESSION SPECIFICATIONS
| Application |
Specification |
| Compression Pressure |
| 2.2L |
|
| 3.2L |
200 psi (1380 kPa) |
| 3.5L |
200 psi (1380 kPa) |
| Compression Pressure (Minimum) |
| 2.2L |
|
| 3.2L |
145 psi (1000 kPa) |
| 3.5L |
145 psi (1000 kPa) |
| Compression Ratio |
| 2.2L |
10.0:1 |
| 3.2L & 3.5L |
9.1:1 |