Compression Check: Testing and Inspection

Compression pressures, checking





Special tools, testers and auxiliary items required
^ Spark plug removal tool 3122 B
^ Torque wrench V.A.G 1331
^ Compression tester V.A.G 1763





- Remove fuse 32

Note: Removing fuse No. 32 interrupts the voltage supply to the injectors.

Test conditions:
^ Engine oil temperature must be at least 30°C.

Work procedure
- Remove engine cover.
- Disconnect ignition coil connectors.
- Remove ignition coils.
- Remove spark plugs using spark plug removal tool 3122 B.
- Using a 2nd technician, have the accelerator pedal completely depressed.
- Check compression pressure using compression tester V.A.G 1763.
- Operate starter until tester shows no further pressure increase.

Compression pressure:

Compression pressure:

- Screw in spark plugs using spark plug removal tool 3122 B and tighten to 30 Nm.

Vehicles with engine code AWD
- Install ignition coils and tighten to 10 Nm.

Vehicles with engine code AWP, AWW
- Install ignition coils. Ensure ignition coils are seated securely.

Continuation for all vehicles
- Check DTC memory.
- Read readiness code.
- If DTC memory was cleared or engine control module disconnected from voltage supply, readiness code must be regenerated.