SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder Injection engine (Autogas) | Engine cylinder head, valve gear | Cylinder head

Compression test

Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter

Special tools and workshop equipment required

t	Spark plug socket and extension -3122 B-

t	Extractor -T10112-

t	Torque wrench -V.A.G 1331-

t	Compression tester -V.A.G 1763- with adapter -V.A.G 1763/6-

Test prerequisite:

l	Engine oil temperature at least. 30 ℃

l	Speedometer must be okay.

Operation process

–	Remove engine cover .

–	Remove the connector for the ignition transformer -N152-.

–	Pull all connectors off the outer injectors.

–	Disconnect the spark plug hood off with extractor -T10112- .

–	Remove the spark plugs using the spark plug spanner -3122 B-.

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

Note

Use of the testing equipment → Instructions.

–	Have a second mechanic operate starter.

Operate starter until pressure reading on tester no longer rises.

Compression values:

New bar	Wear limit bar	Difference between cylinders bar
10,0 … 13,0	7,0	3.0 (maximum)

–	When work has finished, consult the fault memory and delete all faults memorized during testing and repair.

Note

After deleting the event memory, the readiness code must be generated: → Vehicle diagnostic, testing and information system VAS 5051„Guided Functions“.

SEAT Workshop Service and Repair Manuals