1999 AUDI A4 AWM Engine Exhaust System Components Workshop Manual

26-9


Vehicles with all-wheel drive

1 -
Center muffler
Center and rear mufflers are one unit as
original equipment. In cases of repair
replace individually Cutting point Page 26
-20
Align exhaust system so it is free of stress
before tightening clamp Page 26
-37

2 -
25 Nm
3 -
Mounting
4 -
25 Nm
5 -
25 Nm
Always replace
6 -
30 Nm Always replace
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26-10


Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel
Injection & Ignition, Engine Code(s): AWM, Repair Group 24
7 -
Gasket Always replace
8 -
Turbocharger Removing and installing Page 21
-51
9 -
Catalytic converter
Protect from damage by impactRemoving and installing Page 26
-27
10 -
Oxygen sensor - 55 Nm
Upstream of catalytic converterGrease only the threads with high-
temperature lubricant G 052 112 A3. The
lubricant must not get into the slots on the
sensor body. Checking:
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26-11


Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel
Injection & Ignition, Engine Code(s): AWM, Repair Group 24
11 -
Oxygen sensor - 55 Nm Downstream of catalytic converterGrease only the threads with high-
temperature lubricant G 052 112 A3. The
lubricant must not get into the slots on the
sensor body. Checking:
12 -
Gasket
Always replace
13 -
Front exhaust pipe With flexible connection (de coupling
element) Do not bend flexible connection more than
10 - otherwise it can be damaged. Removing and installing Page 26
-32
Align exhaust system so it is free of stress
before tightening clamp Page 26
-37

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26-12


14 -
Mounting
Individual parts of mounting for manual
transmission Fig. 3
, Page 26
-16

Individual parts of mounting for automatic
transmission Fig. 4
, Page 26
-17

15 -
Front clamp
Align exhaust system so it is free of stress
before tightening clamp Page 26
-37

Installation position Fig. 1
, Page
26
-15

Tighten bolted connections evenly
16 -
40 Nm
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26-13


17 -
Rear muffler
Rear and center mufflers are one unit as
original equipment. In cases of repair
replace individually Cutting point Page 26
-20
Align exhaust system so it is free of stress
before tightening clamp Page 26
-37

18 -
Mounting
19 -
25 Nm
20 -
25 Nm
21 -
Mounting
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26-14


22 -
Rear clamp
For separate replacement of center and
rear mufflers Align exhaust system so it is free of stress
before tightening clamp Page 26
-37

Installation position Fig. 2
, Page
26
-15

Tighten bolted connections evenly
23 -
40 Nm
24 -
Mounting
25 -
25 Nm
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26-15


Fig. 1 Installation position of front clamp
- Install clamp in horizontal position.

Bolted connection facing to the left

Fig. 2 Installation position of rear clamp
- Install clamp in horizontal position.

Bolted connection facing to the left
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26-16


Fig. 3 Individual parts of mounting for vehicles with manual
transmission
1 - Buffer
2 - Spacer pipe
3 - Washer
4 - Lug, right
5 - Disc
6 - Bolt - 25 Nm
7 - Spacer
8 - Lug, left
9 - Compression spring
10 - Bolt - 25 Nm
11 - Nut, self-locking - 25 Nm
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