Audi Workshop Service and Repair Manuals

Exhaust system - exploded view

1 -	Rear silencer

q	Combined in one unit with centre silencer as original equipment. Can be renewed individually for repair purposes

q	Cutting point → Anchor

q	Align exhaust system so it is free of stress → Chapter

2 -

23 Nm

3 -

Mounting

q	Renew if damaged

4 -	Centre silencer

q	Combined in one unit with rear silencer as original equipment. Can be renewed individually for repair purposes

q	Cutting point → Anchor

q	Align exhaust system so it is free of stress → Chapter

5 -

40 Nm

6 -	Clamp (front)

q	Before tightening, align exhaust system so it is free of stress → Chapter

q	Installation position → Fig.

q	Tighten bolt connections evenly

7 -	Rubber mounting

q	Renew if damaged

8 -

23 Nm

9 -

Bracket

q	For exhaust system mounting in propshaft tunnel

10 -

23 Nm

q

Renew

11 -	Front exhaust pipe

q	With flexible joint

q	Do not bend flexible joint more than 10° – otherwise it can be damaged

q	Removing and installing → Chapter

q	Align exhaust system so it is free of stress → Chapter

12 -	Lambda probe -G39- (before catalytic converter)

q	The threads on the new Lambda probes are coated with a special assembly paste.

q	If re-installing old Lambda probe, coat thread with high-temperature paste: Refer to → Parts catalogue for high-temperature paste.

q	The assembly paste/high-temperature paste must not get into the slots on the probe body.

q	Tighten to 55 Nm

13 -

40 Nm

q

Renew

14 -

Gasket

q

Renew

15 -	Rubber mounting

q	Renew if damaged

q	Mounting for front exhaust pipe → Fig.

16 -

Gaskets

q

Renew

17 -	Catalytic converter

q	Protect against knocks and impact

q	Removing and installing → Chapter

q	Align exhaust system so it is free of stress → Chapter

18 -	Lambda probe after catalytic converter -G130-

q	Not fitted on all engines

q	The threads on the new Lambda probes are coated with a special assembly paste.

q	If re-installing old Lambda probe, coat thread with high-temperature paste: Refer to → Parts catalogue for high-temperature paste.

q	The assembly paste/high-temperature paste must not get into the slots on the probe body.

q	Tighten to 55 Nm

19 -	Clamp (rear)

q	For separate replacement of centre and rear silencers

q	Before tightening, align exhaust system so it is free of stress → Chapter

q	Installation position → Fig.

q	Tighten bolt connections evenly

20 -

40 Nm

21 -

Mounting

q	Renew if damaged

22 -

23 Nm

Installation position of front clamp –  When fitting clamp, make sure ends of bolts do not project below bottom of clamp -arrow-. l  Bolt connection faces to right.

Installation position of rear clamp –  Install clamp so that ends of bolts do not protrude beyond bottom of clamp. l  Bolt connection faces to left.

Mounting for front exhaust pipe 1 -  Rubber mounting 2 -  Bolt, 34 Nm 3 -  Bolt, 34 Nm 4 -  Bracket 5 -  Front exhaust pipe

Distance between front exhaust pipe and heat shield for steering box –  Fit a 22 mm socket with 1/2 drive (outside diameter approx. 30 mm) on a long extension. l  It should be possible to insert the tool between the front exhaust pipe and heat shield, otherwise the distance must be adjusted.

Aligning catalytic converter –  Align catalytic converter -4- horizontally. –  The distance -3- to the heat shield in the tunnel -2- should be the same on both sides. 1 -  Propshaft