Compression Check: Testing and Inspection

Compression pressures, checking

Special tools, testers and auxiliary items required:

^ Spark plug removal tool 3122 B
^ Compression tester V.A.G 1763
^ Spring-type clip pliers VAS 5024 A
^ Puller T40039

Test sequence

Note:
^ Engine oil temperature min. 30° C
^ Battery voltage at least 12.7 V





- Remove engine cover - arrows -.





^ Remove bolts - 1 -.
- Disconnect connector - 2 - from ignition coils and free up the cable.





- Remove ignition coils with power output stages - 2 - using special tool T40039.
- Remove spark plugs, using spark plug removal tool 3122 B.
- Disconnect 8-pin connector from fuel injectors
- Check compression pressure using compression tester V.A.G 1763 and adapter V.A.G 1763/6.

Note: Using tester: Operating instructions

- Operate starter until tester shows no further pressure increase.

Compression pressure:





- Install spark plugs and ignition coils.
- Read out ECM DTC memory Vehicle Diagnostic, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

Note: By separating the connections, DTCs are stored to memory. After the test, check the DTC memory and erase, if necessary.

Torque specifications