Audi Workshop Service and Repair Manuals

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

Removing   Note Fit all cable ties in the original positions when installing. –  Pull off rear engine cover panel -top arrows-. –  Vehicles without secondary air system: remove plenum chamber partition panel → Rep. Gr.50. –  Vehicles with secondary air system: remove corresponding combination valve for secondary air system: t  Country-specific version 1: left-side → Chapter; right-side → Chapter. t  Country-specific version 2: left-side → Chapter; right-side → Chapter.

Timing chain cover (left-side): –  Detach electrical connectors -1 … 4- from bracket and move clear to side.   Note Disregard -arrows-. –  Move electrical wiring clear.

–  Unscrew bolts -1 ... 8- and remove timing chain cover (left-side).

Timing chain cover (right-side): –  Move fuel line -1- and line -2- (leading to activated charcoal filter) clear at air pipe. –  Disconnect vacuum hose -3- from connection on air pipe. –  Remove air pipe. To do so, release hose clip -4- and clamps -arrows-.

–  Detach electrical connectors -1 … 4- from bracket and move clear to side.   Note Disregard -arrows-.

–  Unscrew bolts -1 ... 8- and remove timing chain cover (right-side).

Installing l  Tightening torques → Fig., → Fig..   Caution Protect lubrication system against contamination. Cover exposed parts of the engine.   WARNING Protect eyes against injuries. Wear safety goggles. –  Remove remaining sealant on timing chain covers, cylinder block and cylinder head using rotating plastic brush or similar. –  Clean sealing surfaces; they must be free of oil and grease.   Note

Note the use-by date of the sealant. –  Cut off nozzle of tube at front marking (nozzle Ø approx. 2 mm).

Caution Make sure lubrication system is not clogged by excess sealant. The bead of sealant must not be thicker than specified. –  Apply sealant bead -arrow- onto the clean sealing surface of the timing chain cover (left-side) as illustrated. l  Width of sealant bead: 2.5 mm.   Note The timing chain covers must be installed within 5 minutes after applying sealant.

–  Install timing chain cover (left-side) and tighten bolts → Fig..

–  Apply sealant bead -arrow- onto the clean sealing surface of the timing chain cover (right-side) as illustrated. l  Width of sealant bead: 2.5 mm.

–  Install timing chain cover (right-side) and tighten bolts → Fig.. Remaining installation steps are carried out in reverse sequence; note the following:   Note Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. –  Vehicles without secondary air system: install plenum chamber partition panel → Rep. Gr.50. –  Vehicles with secondary air system: install corresponding combination valve for secondary air system: t  Country-specific version 1: left-side → Chapter; right-side → Chapter. t  Country-specific version 2: left-side → Chapter; right-side → Chapter.