Compression Check: Testing and Inspection

Compression pressure, checking

Special tools and equipment





- 3122B spark plug removal tool
- VAG1331 torque wrench (5 to 50 Nm)
- VAG1163 compression tester
- T 10094 extractor

Test requirement
- Engine oil temperature at least 30 °C
- Battery voltage must be at least 11.5 volts.

Test sequence





- Remove engine cover -1-. To do so, remove 3 bolts (arrows).
- Remove intake hose between Mass Air Flow (MAF) sensor -G70- and throttle valve control module -J333-
- Remove radiator grill





- Remove securing bolts for lock carrier -1- at left and right.
- Fold out lock carrier with radiator toward the front (arrow).
- Unclip cover for ignition coils with power output stage.





- Disconnect connector (arrows) to ignition coils with power output stage and move wiring harness clear.
- Remove ignition coils using T10094 extractor.
- Remove spark plugs using 3122 B spark plug removal tool.
- Check compression using VAG1763 compression tester.

Note: Using VAG1381 or VAG1763 compression tester.

- Activate starter until no further pressure increases are indicated by VAG 1381 or VAG 1763 compression tester.
Compression values:
New: 10 to 13 bar positive pressure.
Wear limit: 7.5 bar
Tolerated deviation between cylinders: 3 bar