Audi Workshop Service and Repair Manuals

Removing and installing starter catalytic converter Special tools and workshop equipment required

t  Pop rivet nut pliers -VAS 5073- t  Electric drill t  Drill bit, Ø 6 mm t  2x Pop rivet A6x10 -N 908 123- t  Safety goggles

Removing   Note All cable ties which are released or cut open when removing must be fitted in the same position when installing. –  Remove front left wheel. –  Vehicles with auxiliary heater: remove bolts -arrows- securing exhaust pipe for auxiliary/additional heater to noise insulation.

–  Open quick-release fasteners -1 … 3- and take off front and rear noise insulation.

–  Remove noise insulation -1- in wheel housing (left-side).

–  Unbolt heat shield -1- for drive shaft (left-side).

–  Detach electrical connector -1- for exhaust gas temperature sender 2 for bank 1 -G448- at front left of gearbox from bracket, unplug connector and move electrical wiring clear.   Note Disregard -item 2-.

–  Unscrew exhaust gas temperature sender 2 for bank 1 -G448--arrow-.

–  Unscrew nuts -arrows-.

–  Carefully pull engine cover panel off four retaining pins one after the other -arrows-.

–  Unbolt coolant expansion tank -arrow-. –  Detach electrical connector at coolant shortage indicator switch -F66- on coolant expansion tank (bottom). –  Lay aside coolant expansion tank with coolant hoses -1- and -2- connected.

–  Remove heat shield for turbocharger -arrows-.

–  Unplug electrical connector -arrow- for Lambda probe -G39- and move wiring clear.

–  If fitted: unplug electrical connector -arrow- for exhaust gas temperature sender 1 -G235- and move wiring clear.

–  Move earth wire clear at plenum chamber partition panel. –  Move clear noise insulation at plenum chamber partition panel.   WARNING Wear safety goggles. –  Drill out spot welds -arrows- at bracket -1- for coolant expansion tank using a 6 mm Ø drill bit. –  Detach bracket for coolant expansion tank.

–  Unscrew nuts -arrows-. –  Remove starter catalytic converter from engine compartment. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew gaskets and self-locking nuts. t  Fit all cable ties in the original positions when installing. –  Align exhaust system so it is free of stress → Chapter. –  Install temperature sender before particulate filter -G506- → Chapter.

–  Secure bracket for coolant expansion tank to plenum chamber partition panel using two pop rivets (A6x10) -N 908 123- and pop rivet nut pliers -VAS 5073-. Tightening torques

Component	Nm
Starter catalytic converter to turbocharger	27 1)2)
Heat shield to turbocharger	9
Front exhaust pipe to starter catalytic converter	25 1)
Drive shaft heat shield to gearbox	23
l  1) Renew nuts.