Compression Check: Testing and Inspection

Compression, Checking

Special tools, testers and auxiliary items required

• Spark plug removal tool (3122 B)

• Compression tester (V.A.G 1763)

• Ignition Coil Puller (T40039)

Test Conditions

• Engine oil temperature min. 30 °C

• Battery voltage at least 12.5 V

Test Sequence

- Open quick-release fasteners - arrows - and remove the engine cover.





- Disconnect fuel injector connectors - 2 -.





• Ignore - 1 - and - 3 -.

- Remove Ground (GND) wire - 2 -.





- Disconnect the electrical connectors - 3 - and free up the electrical wires.

- Remove ignition coils - 1 -.

• Use the Ignition Coil Puller (T40039) to remove the ignition coils.





- Using Spark Plug Removal Tool (3122 B), remove spark plugs.

- Check compression using Compression Tester (V.A.G 1763 ).

• Using the compression tester. Refer to => Operating instructions.

- Have a second technician press accelerator pedal completely and at the same time operate starter long enough until pressure increase no longer appears on tester.

Compression pressure:





- Install spark plugs and ignition coils.

• Replace ignition coil seals if damaged.

- As a final step, check Engine Control Module (ECM) DTC memory and erase it, since malfunctions were stored by disconnecting electrical connectors.

Tightening Specifications