Compression Check: Testing and Inspection

Compression, Checking

Special tools, testers and auxiliary items required

• Spark plug removal tool (3122B)

• Ignition coil puller (T40039)

• Torque wrench (5-50 Nm) (VAG 1331)

• Compression tester (VAG 1763)

• Adapter (VAG 1381/5A)

Test Conditions

• Engine oil temperature must be at least 30 °C (86 °F).

• Voltage supply OK.

- Remove the engine cover/upper air filter housing. Refer to => [ Engine Cover/Upper Air Filter Housing ] Engine Cover/Upper Air Filter Housing.

- Remove the ignition coils with power output stages. Refer to => [ Ignition Coils with Power Output Stages ] Service and Repair.

- Remove the spark plugs using the (3122B).

- Check the compression using the (VAG 1763) and the (VAG 1381/5A).

• Using the (VAG 1763), refer to => operating instructions.

- Have a second technician operate the starter.

- Operate starter until the (VAG 1763) shows no further pressure increase.

Compression Pressure





- Check the Engine Control Module (ECM) Diagnostic Trouble Code (DTC) memory and erase any DTC entries. Refer to => [ Engine Control Module DTC Memory, Checking and Erasing ] Engine Control Module DTC Memory, Checking and Erasing.