Replacing the crankshaft oil seal on the belt pulley side (VW Passat B6)

Caution: Do not remove the crankshaft. Even unscrewing the main bearing cap bolts will deform the bearing struts of the cylinder block. Such deformations will reduce the clearance in the bearings. Even if the bearing shells are not replaced, they may be damaged due to the changed clearance in the bearings.

Note: If the bearing cap bolts have been removed, the cylinder block must be replaced as a whole, together with the crankshaft.

Note: Measuring the clearance in the main bearings in a service station is not possible

Removal

Remove the front right fender liner.

Remove the poly V-belt.

Turn the crankshaft in the direction of engine rotation to TDC of the first cylinder.



Loosen the belt pulley mounting bolt. Hold the belt pulley with a key to secure it (Fig. 2.16).

Remove the central bolt and remove the crankshaft belt pulley.

Unscrew the inner part of the puller three turns (about 5 mm) from the outer part and secure with a knurled bolt.





Lubricate the threaded head of the puller with engine oil, install it and, pressing hard, screw it as deep as possible into the seal (Fig. 2.19).

Loosen the knurled bolt and rotate the inside of the puller against the crankshaft until the seal is pulled out.

Remove the bearing sleeve from the crankshaft journal and clean the mating surfaces of the crankshaft sprocket and bearing sleeve.

Installation

Place the support sleeve onto the crankshaft journal.

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Note: Check that there is no oil or grease remaining on the mating surfaces of the belt pulley, mounting bolt, support sleeve and crankshaft sprocket.

Place the mandrel on the bushing and place the seal on the bushing (Fig. 2.20).

Remove the mandrel from the bushing.




Press the seal in with the assembly tool using uniform blows until it stops (Fig. 2.21).

Further installation is carried out in reverse order.