Compression Check: Testing and Inspection

Compression, checking

Special tools and equipment





^ Spark plug spanner 3122 B





^ Compression tester V.A.G 1381/V.A.G 1763

Test conditions:
^ Engine oil temperature at least 30°C
^ Battery voltage at least 12.7 Volts





Test sequence
^ Remove engine cover -arrows-.
^ Switch ignition off.





^ Disconnect connectors -3-.
^ Remove ignition coils -1-.
^ Remove spark plugs with spark plug spanner 3122B.
^ Disconnect connectors from all injectors.
^ Fully open throttle valve.
^ Check compression with compression tester VAG 1381N.A.G 1763.

Note: Using the compression tester

Refer to, Operating instructions

^ Operate starter until tester shows no further pressure increase.





Compression pressure values:
^ Install spark plugs and ignition coils.

Note: Replace gaskets for ignition coils if damaged.

^ Check Diagnostic Trouble Code (DTC) memory:

Note: DTC's will have been recorded in the DTC memory because the connectors have been unplugged. Check and, if necessary, erase the DTC memory after completing the test.





Tightening torques