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)

Procedure

• Engine oil temperature at least 30 °C / 86 °F.

• Battery voltage at least 12.5 V.

- Remove the engine covers - arrows -.





- Remove ignition coils.





- Disconnect the electrical connector - 3 - to the fuel injectors on the rear of the left cylinder head.





• Ignore - 1, 2 and arrow -.

- Disconnect the electrical connector - 1 - to the fuel injectors on the rear of the right cylinder head.





• Disregard - arrow -.

- Remove spark plugs with (3122 B).

- Check compression pressure using the (V.A.G 1763).

• Using tester => operating instructions.

- Have a second technician press the accelerator pedal down all the way while operating the starter until the pressure increase is no longer displayed on the tester.

- Repeat procedure on each cylinder.





Assembly is in reverse order of removal, note the following:

• Tightening specifications, refer to => [ Cylinder Head Assembly Overview ] Cylinder Head Assembly Overview.

- Install spark plugs.

- If electrical connectors were disconnected and the engine was started, then malfunctions have been stored in the engine control module. "Generate readiness code" in "Guided Functions".