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.

- Switch off ignition.

- Remove E-box cover by slide both latches in direction of - arrow -.

- Remove Fuel Pump (FP) 2 Relay (J49) - 2.1 - and Fuel Pump (FP) Relay (J17) - 5 -.





- Remove ignition coils.

- Remove spark plugs with Spark Plug Removal Tool (3122 B).

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

- Have a second person completely depress gas pedal and operate starter long enough until tester no longer indicates increase in pressure.

- Repeat procedure on each cylinder.






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

- Install spark plugs.

- Install ignition coils.

Because the relays were removed, malfunctions were saved in the engine control module.

- Connect Vehicle Diagnosis, Testing and Information System (VAS 5051B).

- Start "Guided Functions" operating mode.

- Generate readiness code in ECM.