Compression Check: Testing and Inspection

Compression, Checking

Special tools, testers and auxiliary items required

• Puller for Ignition Coil (T10095A)

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

• Compression Tester (V.A.G 1763)

• Spark Plug Removal Tool (3122 B)

• Assembly Tool (T10118)

Conditions

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

• The battery voltage must be at least 11.5 V.

Sequence

- Place the (T10118) on the release button - arrow -, release the connector retainers, and carefully remove the connectors from ignition coils 1 through 6.






- From straight side of connector, push the (T10095 A) on in the direction of - arrow -, and remove the ignition coil with power output stage.






- Remove fuse SC 27 from fuse holder.

By removing fuse SC 27, voltage supply to fuel pump relay is interrupted.

- Remove spark plugs using (3122 B).

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

Using (V.A.G 1763) the operating instructions.

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

Compression Pressure






- Afterward, reinstall the spark plugs and the ignition coils with the power output stage. Refer to => [ Ignition Coils with Power Output Stages ] Service and Repair.

After test is completed:

- Perform a vehicle system test. Refer to "Guided Fault Finding" in the vehicle diagnostic tester.

- End the vehicle system test, this will automatically erase a Diagnostic Trouble Code (DTC) entries which occurred during the assembly.

- Generate a readiness code in conjunction with a road test.

Observe safety precautions that apply to road tests.

- Perform test drive.

- After that perform a vehicle system test again and repair any occurring malfunctions.