Mechanical Inspection: Compression
WARNING: This page is about a different car, the 1997 Jaguar XJR. However, it is still accessible from the selected car via links, so may be relevant.
Check engine mechanical condition with a compression gauge, vacuum gauge, or an engine analyzer. See engine analyzer manual for specific instructions. Release fuel system pressure before checking engine compression. See FUEL SYSTEM .
COMPRESSION SPECIFICATIONS
| Application | Specification | |||
|---|---|---|---|---|
| Compression Ratio | ||||
| Non-Supercharged | 10.0:1 | |||
| Supercharged | 8.5:1 | |||
| Compression Pressure (1) | 157-167 psi (11.0-11.7 kg/cm2 ) | |||
| Maximum Variation Between Cylinders | 10 psi (.70 kg/cm2 ) | |||
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