Compression Check: Testing and Inspection

Compression, checking

Special tools and equipment
- VAG1381 or VAG1763 compression tester
- 3122B spark plug removal tool

Test condition
- Minimum engine oil temperature: 30°C (86° F)

Test procedure
- Remove engine covers.
- Switch ignition off and remove harness connectors to ignition coils.





- Unbolt ignition coils (arrows).
- Remove all harness connectors to fuel injectors.
- Using 3122B spark plug removal tool, remove all spark plugs.
- Open throttle to Wide Open Throttle (WOT) position.
- Using VAG1381 or VAG1763 compression tester, test engine compression.

Note: Use VAG1381 or VAG1763 compression tester = user manual.

- Activate starter until no further pressure increases are indicated by VAG1381 or VAG1763 compression tester.





Compression pressure

Permissible difference between all cylinders: 3 bar (43 psi)
- Install spark plugs and ignition coils.
- Check DTC memory.

Note: Diagnostic Trouble Codes (DTCs) are stored when harness connectors are disconnected. After testing, check DTC memory and erase.





Tightening torques