Audi Workshop Service and Repair Manuals

Removing and installing timing chain cover (bottom) Special tools and workshop equipment required t  Electric drill with plastic brush attachment t  Safety goggles t  Sealant → Electronic parts catalogue

Removing –  Remove sump → Chapter. –  Removing idler roller for poly V-belt → Chapter. –  Remove poly V-belt pulley for coolant pump → Chapter. –  Remove poly V-belt pulley for crankshaft → Chapter. –  Loosen and remove bolts in the sequence -M … A-. –  Carefully release timing chain cover (bottom) from bonded joint and remove cover. –  Press crankshaft oil seal out of timing chain cover (bottom). Installing l  Tightening torques → Fig. „„Timing chain cover (bottom) - tightening torque and tightening sequence““   Note t  Renew the bolts tightened with specified tightening angle. t  Renew the crankshaft oil seal.   Caution Protect lubrication system against contamination. Cover exposed parts of the engine. –  Remove old sealant from grooves on timing chain cover (bottom) and from sealing surfaces.

WARNING Protect eyes against injuries. Wear safety goggles. –  Remove remaining sealant on timing chain cover (bottom), cylinder head and cylinder block using rotating plastic brush or similar.   Note

Note the use-by date of the sealant. –  Cut off nozzle of tube at front marking (nozzle Ø approx. 2.5 mm). –  Clean sealing surfaces; they must be free of oil and grease.

Caution Make sure lubrication system is not clogged by excess sealant. The bead of sealant must not be thicker than specified. –  Apply sealant bead -1- onto clean sealing surface of timing chain cover (bottom) as shown in illustration. l  The bead of sealant must be 2.0 … 3.0 mm thick.   Note The timing chain cover must be installed within 5 minutes after applying the sealant.

–  Carefully fit timing chain cover (bottom) onto dowel pins -arrows- and press cover on until it makes contact with cylinder block and cylinder head.

–  Screw bolts for timing chain cover (bottom) in by hand until they make contact and then tighten bolts → Fig.. Remaining installation steps are carried out in reverse sequence; note the following: –  Install crankshaft oil seal → Chapter. –  Install poly V-belt pulley for coolant pump → Chapter. –  Install idler roller for poly V-belt → Chapter. –  Install sump → Chapter.