SEAT Workshop Service and Repair Manuals

Renewing valve stem oil seals with cylinder head removed

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

Special tools and workshop equipment required

t	Extractor -3364-, see equivalent → Anchor

t	Pressure tool -3365-, see equivalent → Anchor

t	Valve insertion socket -VAS 5161-, please see Correspondence → Anchor

t	Engine and gearbox support -VAS 6095-, see equivalent → Anchor

t	Cylinder head clamping device -VAS 6419-, see equivalent → Anchor

Operation process –  Remove camshafts; 1.8 litre engine → Chapter, 2.0 litre engine → Chapter. –  Mark original positions of roller rocker fingers and hydraulic compensation elements for reinstallation. –  Remove roller rocker fingers together with hydraulic compensation elements and put down on a clean surface. –  Insert cylinder head tensioning device -VAS 6419- into engine and gearbox support -VAS 6095-. –  Tension cylinder head on cylinder head tensioning device as shown in illustration. –  Connect cylinder head clamping device to compressed air.

–  Using lever -arrow-, slide air pad under combustion chamber where valve stem oil seal is to be removed. –  Allow compressed air to flow into air cushion until it lies against valve disc.

–  Fasten the template -VAS 5161/19B- to the cylinder head with theknurled bolts -VAS 5161/12-, as shown in the figure. –  Set piston of appropriate cylinder to „bottom dead centre“. –  Apply the punch -VAS 5161/3- to the guide plate and use plastic-headed hammer to release sticking valve cotter pins.

For inlet side –  Screw the snap-in device -VAS 5161/6- with engaging fork -VAS 5161/5- into the centre thread of the guide plate -VAS 5161/19B-. –  Insert the assembly cartridge -VAS 5161/8- in guide plate -VAS 5161/19B-. –  Engage pressure fork -VAS 5161/2- on snap-in device -VAS 5161/6-.

For exhaust side –  Screw the snap-in device -VAS 5161/6- with engaging fork -VAS 5161/5- into the outer thread of the guide plate -VAS 5161/19B-. –  Press down assembly cartridge -VAS 5161/8- and at the same time, turn knurled screw of assembly cartridge -VAS 5161/8- clockwise until tips engage in valve cotters. –  Move knurled screw back and forth slightly; the valve cotters are thus forced apart and taken up by the assembly cartridge. –  Release the pressure prong -VAS 5161/2-. –  Take out assembly cartridge -VAS 5161/8-.

–  Pull off valve stem oil seal with valve stem seal puller -3364-. Installing valve stem oil seals   Caution Risk of damage when installing valve stem seals. New valve stem oil seals -B- are supplied with plastic sleeve; fit plastic sleeve -A- onto valve stem.

–  Lightly oil sealing lip of valve stem seal. –  Push valve stem oil seal onto plastic sleeve. –  Carefully press valve stem oil seal onto valve guide using valve stem seal fitting tool -3365-. –  Remove plastic sleeve. –  Insert valve spring and valve spring plate. –  Install the value assembly -VAS 5161- as shown in the figure.

Inlet side

Exhaust side   Note

t  If valve cotters have been removed from assembly cartridge, they need to be put into insertion device -VAS 5161/18- first. t  Press the assembly cartridge -VAS 5161/8- onto insertion device from above and pick up the valve cotter pins. –  Use pressure fork -VAS 5161/2- to press down assembly cartridge -VAS 5161/8-, then turn knurled screw of assembly cartridge back and forth while pulling upwards. –  Release pressure fork -VAS 5161/2- with knurled screw in pulled position. –  Detach the value assembly -VAS 5161-. Further assembly is basically the reverse of the dismantling sequence. The following should be taken into account: –  Install the camshafts; 1.8 litre engine → Chapter, 2.0 litre engine → Chapter.