Compression Check: Testing and Inspection

Compression pressure, checking

Special tools and repair equipment required

Spark plug wrench 3122 B:

Compression tester VAG 1381 or VAG 1763:

Requirements
^ Engine oil temperature at least 30°C
^ Battery voltage at least 12.7 V

Work sequence





- Remove engine cover (arrows).
- Switch off ignition.





- Disconnect connectors -3-.
- Pull out ignition coils -1-.
- Use spark plug wrench 3122B to remove spark plugs.
- Disconnect connectors from all injectors.
- Fully open throttle valve.
- Check compression with compression tester VAG 1381 or VAG 1763.

Note: Using the compression tester:

Go to Operating instructions
- Operate starter until tester shows no further pressure increase.

Compression pressure





- Install spark plugs and ignition coils.

Note: Replace gaskets for ignition coils if damaged.

- Check Diagnostic Trouble Code (DTC) memory:

Note: Diagnostic Trouble Codes (DTCs) will have been recorded in DTC memory because connectors have been disconnected. Check and, if necessary, erase DTC memory after completing check.

Tightening torques

Tightening torques: