Audi Workshop Service and Repair Manuals

Removing and installing front exhaust pipe with catalytic converter

Removing –  Pull off engine cover panel -arrows-.

–  Remove bolts -arrows-. –  Remove air ducts -1- and -2-.

–  Unplug electrical connector -1- at air mass meter -G70-. –  Loosen hose clip -2- to remove air intake hose. –  Move clear wiring harness at air cleaner housing and remove air cleaner housing -arrow-.

–  Unscrew nuts on turbocharger -arrows-.

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

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

To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°. –  Disconnect exhaust system at clamp -arrow-. –  Detach front exhaust pipe with catalytic converter. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew gaskets and self-locking nuts. t  Hose connections and hoses for charge air system must be free of oil and grease before assembly. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. t  To ensure that the charge air hoses can be properly secured at their connections, spray rust remover onto the worm thread of used hose clips before installing. –  Align exhaust system so it is free of stress → Chapter. Tightening torques

Component	Nm
Catalytic converter to front exhaust pipe	25 1)
Catalytic converter to turbocharger	27 1)2)
Drive shaft heat shield to gearbox	23
l  1) Renew nuts. l  2) Coat with high-temperature paste; for high-temperature paste refer to → Electronic parts catalogue