Compression Check: Testing and Inspection

Compression, Checking

Special tools, testers and auxiliary items required

• Compression tester (V.A.G 1763)

• Spark plug removal tool (3122 B)

• Ignition Coil Puller (T40039)

• Spring-type clip pliers (VAS 5024 A)

Test sequence

• Engine oil temperature min. 30 °C

• Battery voltage at least 12.7 V

- Remove engine cover - arrows -.





- Remove bolts - 1 -.





- Disconnect connector - 2 - from ignition coils and free up cable.

- Remove ignition coils with power output stages - 2 - using Ignition Coil Puller (T40039).





- Remove spark plugs, using spark plug removal tool (3122 B).

- Disconnect 8-pin connector from fuel injectors => [ 8-pin harness connector
for fuel injectors ] Component Locations Overview

- Check compression using compression tester (V.A.G 1763) and adapter (V.A.G 1763/6).

• Using tester: => Operating instructions

- Operate starter until tester shows no further pressure increase.

Compression pressure:





- Install spark plugs and ignition coils.

- Read out ECM DTC memory => Vehicle Diagnostic, Testing and Information System VAS 5051 in "Guided Fault Finding" function

• By separating the connections, DTCs are stored to memory. After the test, check fault memory and erase, if necessary.

Tightening Specifications