Compression, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Spark Plug Removal Tool -3122 B-
Ignition Coil Puller -T40039-
Torque Wrench (5-50 Nm) -V.A.G 1331-
Compression Tester -V.A.G 1763-
Adapter -V.A.G 1381/5A-

Test Conditions:

Engine oil temperature must be at least 30 °C (86 °F).
Voltage supply is OK.

Procedure

-- Remove the engine cover/upper air filter housing. Refer to ENGINE COVER/UPPER AIR FILTER HOUSING .

-- Remove the ignition coils with power output stage. Refer to IGNITION COIL WITH POWER OUTPUT STAGE .

-- Remove the spark plugs using the spark plug removal tool -3122 B-.

-- Check the compression using the compression tester -V.A.G 1763- and the adapter -V.A.G 1381/5A-.

NOTE:

Using the compression tester, refer to the operating instructions.

-- Have a second technician operate the starter.

-- Operate the starter until the tester shows no further pressure increase.

Compression Pressure:

Engine Code	New Bar Positive Pressure	Wear Limit Bar Positive Pressure	Difference Between Cylinders Bar Positive Pressure
BPY	11.0... 14.0	7.0	Max. 3.0

-- To conclude work, check the Diagnostic Trouble Code (DTC) memory of the Engine Control Module (ECM), erase all DTC entries which may have occurred during the tests and repairs.

NOTE:

Generate a readiness code if the DTC memory was erased. Refer to "Guided Function" in the vehicle diagnosis, testing and information system VAS 5051.