Audi Workshop Service and Repair Manuals

Removing and installing catalytic converter Special tools and workshop equipment required

t  Chain-type pipe cutter -VAS 6254-

t  Setting tool -T40035-

Removing –  Remove noise insulation -arrows-.

–  Unscrew all nuts -arrows- at exhaust system/turbocharger.   Note

To avoid any damage, the flexible joint must not be bent more than 10°. –  Support flexible joint (decoupling element) with fixing tool -T40035-.

–  Unbolt heat shield for exhaust system -arrows-.

–  On vehicles with two-piece exhaust pipes, loosen nuts on clamp -4- and move clamp towards rear to separate exhaust system. –  On vehicles with one-piece exhaust pipes, cut through exhaust pipe at a right angle at cutting point -2- using chain-type pipe cutter -VAS 6254-.   Note Disregard -items 1 and 3-.

–  Disengage rubber mountings -arrows- and remove catalytic converter. Installing Installation is carried out in the reverse order; note the following:   Note Renew gaskets and self-locking nuts.

–  When reassembling, position the clamp -4- centrally over the markings -1 and 3-.

–  Install clamp so that bolts are positioned horizontally -arrow-. Bolt connection faces downwards. The thread of the bolt points to left side of vehicle. Tightening torques

Component	Nm
Catalytic converter to turbocharger	25 1)2)
Clamp	23
l  1) Renew nuts. l  2) Coat threads and contact surface of bolt heads with high-temperature paste; for high-temperature paste refer to → Parts catalogue.