Audi Workshop Service and Repair Manuals

Removing and installing front exhaust pipe (right-side) with catalytic converter - vehicles with automatic gearbox 01V Special tools and workshop equipment required

t  Lambda probe open ring spanner set -3337-

t  Engine and gearbox jack -V.A.G 1383 A-

Removing –  Pull off engine cover panel (rear) -arrows-.

–  Remove cover -1- at right of engine compartment.

–  Remove bolts -arrows-. –  Disengage activated charcoal filter solenoid valve 1 -N80--item 1- at air duct. –  Remove air duct -2-.

–  Remove air cleaner housing -arrows-.

–  Unbolt retaining plate -3- for solenoid valves -arrows-. –  Detach air intake hose -1- at air mass meter -G70-. –  Disconnect crankcase breather hose -4- at air duct -2-.

–  Unscrew bolt -arrow- and pull air duct -2- off throttle valve module -J338-. –  If fitted, disconnect hose -1- from air duct.   Note Shown from rear with engine removed for illustration purposes.

–  Remove electrical connectors -1 ... 4- from bracket (on right side of bulkhead). –  Unplug electrical connectors -1- and -4-. –  Move electrical wiring to Lambda probes clear.

–  Unscrew Lambda probe after catalytic converter -G130--arrow- using tool from Lambda probe open ring spanner set -3337/7-.   Note Shown in illustration with engine removed.

–  Unscrew nut -2- (accessible from above) securing front exhaust pipe to exhaust manifold.   Note Shown in illustration with engine removed.

–  Remove front right wheel. –  Release bolts or quick-release fasteners -1- and -2- and take off front noise insulation. –  If fitted, open quick-release fasteners -3- and remove rear noise insulation.

–  Unscrew bolts -1 … 4- and remove front cross-piece.   Note

To avoid any damage, the flexible joint in the front exhaust pipe must not be bent more than 10°. –  Loosen both clamps on exhaust system -arrows- and disconnect exhaust pipes.

–  Remove heat shield above exhaust system. –  Remove heat shield for propshaft from cover for Torsen differential -arrows-. –  Unscrew bolts at gearbox/propshaft flange. –  Slide propshaft together towards rear final drive; the constant velocity joints can be moved axially –  Place the propshaft onto exhaust system.

–  Position lifting column of engine and gearbox jack -V.A.G 1383 A- directly behind rear of ATF oil pan with a piece of wood -1- placed in between.   Caution The lock carrier must be installed.

–  First remove bolts -2- and -3- and then subframe bolts -1- and -4-. –  Lower gearbox and subframe slowly using engine and gearbox jack -V.A.G 1383 A-.

–  Unscrew bolts -1 ... 4- for gearbox mounting. –  Unscrew both gearbox supports -5- and -6- from gearbox housing and remove gearbox supports with gearbox mountings. –  Carefully lower gearbox.

–  Unbolt heat shield -1- for drive shaft (right-side). –  Remove drive shaft (right-side) → Rep. Gr.40.

–  Unbolt mounting plate for front exhaust pipe -arrow-.

–  Remove bracket -arrow- for ATF pipes.   Note

Observe rules for cleanliness when working on automatic gearbox → Rep. Gr.37. –  Place drip tray or used oil collection and extraction unit -V.A.G 1782- underneath. –  Unscrew bolt -arrow- and detach ATF pipes from gearbox. –  Tie ATF pipes to one side.

–  Expose Lambda probe wiring. –  Remove nuts -1- and -3- (accessible from below) securing front exhaust pipe to exhaust manifold.   Note Shown in illustration with engine removed. –  Remove 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  Threads of new Lambda probes are already greased with assembly paste; the paste must not get into the slots on the probe body t  When re-using the old Lambda probe, grease thread with high-temperature lubricant; the paste must not get into the slots of the probe body; High-temperature lubricant → Parts catalogue. t  Fit all cable ties in the original positions when installing. t  When installing, the Lambda probe wires must always be reattached at the same locations to prevent them from coming into contact with the exhaust pipe. –  Install gearbox supports → Rep. Gr.37. –  Install subframe → Rep. Gr.40. –  Install drive shaft → Rep. Gr.40. –  Install propshaft → Rep. Gr.39. –  Secure ATF lines → Rep. Gr.37. –  Align exhaust system so it is free of stress → Chapter.   Note Components of exhaust pipe mountings on gearbox for vehicles with automatic gearbox 01V → Fig.. –  Check ATF level → Rep. Gr.37. Tightening torques

Component		Nm
Front exhaust pipe with catalytic converter to:	Exhaust manifold	27
	Mounting plate	25
Mounting plate to gearbox		25
Lambda probe to catalytic converter		55
Drive shaft heat shield to gearbox		23
Front cross member to body		55