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) (V.A.G 1331)

• Compression Tester (V.A.G 1763)

• Adapter (V.A.G 1381/5A)

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 stage. Refer to => [ Ignition Coils with Power Output Stages ] Service and Repair.

- Remove the spark plugs using (3122 B).

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

• Using (V.A.G 1763), refer to the operating instructions.

- Have a second technician crank the starter.

- Crank the starter until the (V.A.G 1763) shows no further pressure increase.

Compression Pressure





- To conclude work, check the Diagnostic Trouble Code (DTC) memory of the Engine Control Module (ECM), erase all DTC entries which may have occurred during the tests and repairs.

• If the DTC memory was erased, generate a readiness code, refer to "Guided Function" in the vehicle diagnostic tester.