SEAT Workshop Service and Repair Manuals

Checking compression

Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Spanner -U-40082-, see equivalent → Anchor

t	Torque wrench kit -SAT 8010-, see equivalent → Anchor

t	Adapter -VAG 1381/12-, see equivalent → Anchor

t	Compression tester -VAG 1763-, see equivalent → Anchor

t  Central diagnosis -VAS 5051B- or central diagnosis -VAS 5052A-, see equivalent → Anchor Test condition l  Engine oil temperature at least. 30 ℃ Checking sequence

Engine code letters BJB, BKC, BXE, BXF –  Pull the oil dipstick -1- out of the guide tube. –  Lift the engine cover by the sides -arrows 2- and pull it out forwards -arrow 3-. –  Replace the oil dipstick in the guide tube.

Select engine identification letters BLS –  First remove the outer cover -1- and then the inner cover -2- upwards equally. Continued for all vehicles

–  Release the connector -arrow 1- and unscrew knurled nut -arrow 2-. –  Disconnect the central connection for the pump injectors.

–  Remove the connector support from the glow plugs -arrow- –  Unscrew the glow plugs using spark plug spanner -U-40082-.

–  Screw in the adaptor -VAG 1381/12- in the place of the glow plugs. –  Check compression with the compression tester -VAG 1763-.   Note Using the compression tester → Operating instructions. –  Operate starter until pressure reading on tester no longer rises. Compression pressure

New bar positive pressure	Wear limit bar positive pressure	Difference between cylinders bar positive pressure
25,0 … 31,0	19,0	5.0 (maximum)

–  Fit the glow plugs using spark plug spanner -U-40082- to 15 Nm. –  Consult the event memory vehicle diagnostic, testing and information system -VAS 5051B- or vehicle diagnostic, testing and information system -VAS 5052A-.   Note When the central connection for the pump injectors is removed, this is recorded by the fault memory. Therefore, read event memory and delete if necessary.