Compression Check: Testing and Inspection

Compression, Checking

Special tools, testers and auxiliary items required

• Spark Plug Wrench (3122 B)

• Ignition Coil Puller (T40039)

• Torque Wrench (5-50 Nm) (V.A.G 1331)

• Compression Tester (V.A.G 1763)

• Adapter (V.A.G 1381/5A)

Test Conditions

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

• Voltage supply OK.

- Remove the engine cover with air filter. Refer to => [ Engine Cover with Air Filter ] Engine Cover With Air Filter.

- Disconnect the connectors from the fuel injectors.

- 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 compression using the (V.A.G 1763) and (V.A.G 1381/5A).

• Using the tester, refer to the operating instructions.

- Operate the starter until the tester no longer indicates that the pressure is increasing.

Compression Pressure





• By disconnecting the connections, Diagnostic Trouble Codes (DTCs) are stored to memory. After the test, check the fault memory and erase, if necessary.

- Read the Engine Control Module (ECM) DTC memory. Refer to the vehicle diagnostic tester.