Volkswagen Workshop Service and Repair Manuals > Golf Mk6 > Power unit | 4-cylinder injection engine (1.8 and 2.0 l engine, chain drive) | Engine cylinder head, valve gear | Cylinder head

Compression test

Special tools and workshop equipment required

t	Spark plug socket and extension -3122 B-

t	Puller -T40039-

t	Torque wrench -V.A.G 1331-

t	Compression tester -V.A.G 1763-

Test procedure

Note

t	Always follow safety precautions → Chapter.

t	Engine oil temperature min. 30 °C.

t	Battery voltage at least 12.7 V

Proceed as follows:

–	Pull off engine cover → Chapter.

–	Detach electrical connectors -arrows- at ignition coils.

–	Remove ignition coils using puller -T40039-.

–	Remove spark plugs with spark plug socket -3122 B-.

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

Note

–	Start engine until tester shows no further pressure increase.

Compression pressures:

New pressure in bar	Wear limit in bar	Permissible difference between cylinders in bar
11.0 … 14.0	7.0	max. 3.0

–	Install spark plugs, specified torque → Chapter.

–	Install ignition coils with output stages → Chapter.

Note

Events will have been stored in the memory as connectors were disconnected. Read and, if necessary, clear the event memory after the test.

–	Read event memory of engine control unit → Vehicle diagnostic tester.

Volkswagen Workshop Service and Repair Manuals