Compression Check: Testing and Inspection

Compression, checking





Special tools and equipment
^ 3122B Spark plug wrench
^ VAG 1331 Torque wrench (5 to 50 Nm)
^ VAG 1763 Compression tester

Conditions
^ Engine oil temperature must be at least 30° C.

Work sequence
- Disconnect ignition coil connector(s).
- Remove ignition coils.
- Remove spark plugs with spark plug 3122B.
- Have a second technician fully depress accelerator pedal.
- Check compression using compression tester VAG 1381NAG 1763.

Note: - compression tester operating instructions.

- Operate starter until tester shows no further pressure increase.





Compression pressure

Permissible difference between all cylinders: 3 bar
- Install ignition coils and tighten to 10 Nm.