Compression Check: Testing and Inspection

- Engine coolant temperature at least 30° C (86° F)
- Throttle valve fully open during cranking
- Disconnect both harness connectors from power output stage.
- Disconnect all fuel injection harness connectors.
- Connect compression pressure recorder VAG1381 and adapter 1381/5, or equivalent, to first cylinder.
- Operate starter until tester shows no further pressure increase.

Compression Pressure Specifications
- New: 11-16 bar (160-232 psi)
- Wear limit: 9.0 bar (131 psi)
- Max. permissible pressure difference between all cylinders: 3 bar (44 psi)

CAUTION: If compression pressure is not within the specified values, recheck compression pressure after a test drive.