Audi Workshop Service and Repair Manuals

Removing and installing sealing flange (front) 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 –  Move lock carrier to service position → Chapter. –  Remove poly V-belt → Chapter.

–  Pry off cover from idler roller for poly V-belt. –  Unscrew bolt -arrow- and remove idler roller for poly V-belt.

–  Unscrew bolts -arrows- and remove cover.

–  Remove toothed belt → Chapter. –  Remove crankshaft sprocket; use counterhold tool -3415- to lock sprocket in place.

–  Remove bolts -1 ... 10-. –  Pull off sealing flange (front). –  Drive out oil seal with flange removed. Installing   Note t  Renew the bolts tightened with specified tightening angle. t  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 The sealant bead must not be thicker than specified, otherwise excess sealant could enter the sump and clog the strainer in the oil pump.

–  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: 1.  Tighten bolts -1 ... 6-. 2.  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) → Anchor. –  Install vibration damper → Chapter. –  Install poly V-belt → Chapter. –  Install lock carrier with attachments → Rep. Gr.50.

–  Allow stop for torque reaction support to rest on rubber buffer for torque reaction support under its own weight and tighten nuts -arrows-. –  Install bumper cover (front) → Rep. Gr.63. Tightening torques

Component	Nm
Sealing flange to cylinder block	15
Toothed belt sprocket to crankshaft	120 + 90° 1)2)
Idler roller to bracket for ancillary units	20 + 90° 1)2)
Stop for torque reaction support to lock carrier	28
Hose clips (9 mm wide)	3
Hose clips (13 mm wide)	5.5
l  1) Renew bolts. l  2) 90° = one quarter turn.