Audi Workshop Service and Repair Manuals

Removing and installing sealing flange (pulley end) Special tools and workshop equipment required

t  Counterhold tool -3415-

t  Assembly tool -T10053- t  Electric drill with plastic brush attachment t  Safety goggles t  Sealant → Electronic parts catalogue

Removing l  Engine in vehicle. –  Remove toothed belt: vehicles with small engine support → Chapter, vehicles with large engine support → Chapter –  Remove crankshaft sprocket; use counterhold tool -3415- to lock sprocket in place.

–  Remove bolts -1 ... 10-. –  Pry off sealing flange (pulley end) and remove. –  Drive out oil seal with sealing flange removed. Installing   Note Place a cloth over the exposed section of the sump. –  Carefully remove any sealant residue on the cylinder block and sump.

WARNING Wear safety goggles. –  Remove sealant residue from sealing flange with rotating plastic brush or similar. –  Clean sealing surfaces; they must be free of oil and grease.

–  Cut off tube nozzle at front marking (nozzle approx. 2 mm Ø).

–  Apply a thin bead of sealant at the edge of the joint between the cylinder block and the sump -arrows-.

–  Apply the bead of sealant onto the clean sealing surface of the sealing flange as illustrated -arrow-. l  Thickness of sealant bead: 2 ... 3 mm   Note Sealant bead must not be wider than 3 mm, otherwise excess sealant could ingress into sump and clog strainer in oil intake pipe.

–  Coat the lower sealing surface on the sealing flange lightly with sealant -hatched area-.   Note The sealing flange must be installed within 5 minutes after applying sealant. –  Push the sealing flange carefully onto the dowel pins on the cylinder block.

–  Tighten bolts in the specified sequence: –  Tighten bolts -1 ... 6-. –  Tighten bolts -7 ... 10-. –  Install crankshaft oil seal (pulley end) → Anchor.

–  Renew centre bolt for toothed belt sprocket. l  Contact surface between toothed belt sprocket and crankshaft must be free of oil. l  Do not lubricate bolt for crankshaft sprocket. –  Install crankshaft sprocket; use counterhold tool -3415- to lock sprocket in place. Remaining installation steps are carried out in reverse sequence; note the following: –  Install toothed belt (adjust valve timing): vehicles with small engine support → Anchor, vehicles with large engine support → Anchor –  Install vibration damper → Chapter. –  Install poly V-belt → Chapter. Tightening torques

Component	Nm
Sealing flange to cylinder block	15
Toothed belt sprocket to crankshaft	120 + 90° 1)2)
l  1) Renew bolt. l  2) 90° = one quarter turn.