Compression Check: Testing and Inspection

Compression, checking

Test requirements

^ Engine oil temperature not less than 30 degrees C

Test sequence

- Remove engine cover.





- Pull connector off Camshaft Position (CMP) Sensor -G40- (arrow).
- With ignition switched off, disconnect connectors from ignition coils.
- Remove ignition coils.
- Remove spark plugs with spark plug wrench 3122B.
- Fully open throttle valve.
- Check compressions with compression tester VAG 1381/VAG 1763.

Note:
Using the compression tester

- Operate starter until tester shows no further pressure increase.

Compression pressure:





- Install spark plugs and ignition coils.
- Interrogate DTC memory:

Note:
DTCs will have been stored in the memory because the connector to the Camshaft Position (CMP) Sensor has been disconnected. Therefore interrogate and erase DTC memory after the test.

Tightening torque