Removal and installation the sealing flange on the belt pulley side (VW Passat B6)

Removal the flange

Remove the poly V-belt.

Remove the timing belt

Then turn the crankshaft back slightly.



Remove the crankshaft sprocket. To do this, secure the crankshaft gear with a counter support (fig. 2.138).

Remove the oil pan.

Engines BLX, BLY, BLR, BVX, BVY, BVZ

Unscrew the front sealing flange.

Remove the sealing flange, if necessary, dismantle it by lightly tapping with a rubber hammer.

Remove any remaining sealant from the cylinder block using a flat scraper.

Cover the seal with a clean rag.

Note: If it is necessary to replace the sealing ring, it must be removed.

Remove any remaining sealant from the sealing flange using a drill with a plastic bristle brush attachment (put on safety glasses).

Clean the mounting surfaces. They should be free of oil and grease.

Installing the flange

Cut off the tube tip along the front mark (Holes about 3 mm).

Apply a bead of sealant approximately 2-3 mm thick to the clean flange seating surface.

Note: The sealant bead should not be thicker than 2-3 mm, otherwise excess sealant may get into the oil pan and clog the mesh filter in the oil intake pipe.

Note: Observe the expiration date of the sealant.

Note: The sealing flange must be installed within 5 minutes after applying the silicone sealant.

To install the sealing flange with the sealing ring installed, use the guide bushing.

After installation, let the sealant dry for about 30 minutes. Only then can you fill it with engine oil.



Immediately press the sealing flange and lightly tighten all bolts (fig. 2.143).

Tighten the sealing flange mounting bolts in a crosswise pattern. Tightening torque: 15 Nm.

Remove excess sealant.

Install the oil pan.

Engines BLX, BLY, BLR, BVX, BVY, BVZ

Install the sealing ring if necessary.

There should be no oil on the mating surfaces between the timing belt drive gear and the crankshaft.

The center bolt needs to be replaced.

There should be no oil or grease on the threads and flange.

Install the crankshaft gear and secure it with a counter support.

Tighten the new bolt to 90 Nm and turn it an additional 90° (1/4 turn) (turning can be carried out in several stages).

Further installation and assembly is carried out in the reverse order of removal.