Engine Compression
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1997 BMW Z3, 1997 BMW M3, 1997 BMW 850Ci, 1997 BMW 840Ci, and 1997 BMW 750iL. However, it is still accessible from the selected car via links, so may be relevant.
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open. The DME master relay and/or fuel pump relay MUST be pulled out for compression test. See ADJUSTMENTS article for additional information.
COMPRESSION SPECIFICATIONS
| Application | Specification | ||||
|---|---|---|---|---|---|
| Compression Ratio (1) | |||||
| 4-Cylinder | 10.0:1 | ||||
| 6-Cylinder | |||||
| 2.3L & 3.2L | 10.5:1 | ||||
| 2.8L | 10.2:1 | ||||
| V8 | 10.0:1 | ||||
| Compression Pressure | |||||
| All Models | 142-156 psi (10-11 kg/cm2 ) | ||||
|
|||||