AUDI TT 1997 8N / 1.G AEB ATW Engines Exhaust System Components Workshop Manual

26-1


Exhaust system components,
removing and installing

WARNING!

Do not re-use any fasteners that are worn or
deformed in normal use.
Some fasteners are designed to be used only
once, and are unreliable and may fail if used
a second time. This includes, but is not
limited to, nuts, bolts, washers, circlips and
cotter pins. Always follow the
recommendations in this manual-replace
these fasteners with new parts where
indicated, and any other time it is deemed
necessary by inspection.

Note:
Always replace gaskets and self-locking nuts.
After exhaust system repairs, make sure
exhaust system is not under stress and that it
has sufficient clearance from the bodywork. If
necessary, loosen double clamps and align
muffler and exhaust pipe so that sufficient
clearance is maintained to the bodywork and
the support rings are evenly loaded.

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The exhaust flexpipe must not be bent more
than 10 , otherwise it may be damaged.
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26-2


Front-wheel-drive vehicles

1 -
Nut
40 Nm (30 ft b)
2 -
Double clamp Before tightening, ensure exhaust system
is free of stress Page 26
-24

Installation position: bolt ends point toward
left Installation position of bolt ends Page 26
-13
, Fig. 3

Tighten bolts evenly
3 -
Nut 40 Nm (30 ft b)
4 -
Double clamp Used when front or rear muffler is replaced
separately Before tightening, ensure exhaust system
is free of stress Page 26
-24

Installation position: bolt ends point toward
rear Installation position of bolt ends %page
Page 26
-13
, Fig. 3

Tighten bolts evenly
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26-3


5 -
Bolt
25 Nm (18 ft lb)
6 -
Mount
7 -
Gasket Always replace
8 -
Nut Always replace30 Nm (22 ft lb)
9 -
Gasket Always replace
10 -
Turbocharger Removing and installing Page 21
-30
11 -
Three Way Catalytic Converter (TWC)
Protect from damageRemoving and installing Page 26
-21
Disconnect Heated Oxygen Sensor
(HO2S) harness connector Page 26
-21

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26-4


CAUTION!
Part numbers are listed here for reference only.
Always check with your Parts department for
the latest information. 12 -
Heated Oxygen Sensor (HO2S)
50 Nm (37 ft lb)Only grease threads with "G 052 112 A3."
Do NOT allow grease to get into slots on
sensor body

Checking Repair Manual, 1.8 Liter 4-Cyl. 5V
Turbo Fuel Injection &Ignition, Repair Group 24
13 -
Nut
Always replace25 Nm (18 ft lb)
14 -
Bolt 25 Nm (18 ft lb)
15 -
16Mount
Different versions for manual and automatic
transmissions Manual transmission Page 26
-12
, Fig.
1

Automatic transmission Page 26
-13
,
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Fig. 2

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26-5


17 -
Front exhaust pipe
With flexpipeFlexpipe must not be bent more than 10 ,
otherwise it may be damaged To remove, unbolt floor crossmember (20
Nm/15 ft lb) Align exhaust system free of stress
Page 26
-24

18 -
Mount
19 -
Bolt
25 Nm (18 ft lb)
20 -
Rear muffler Factory-installed with front muffler as one
unit. If repair is necessary, replace
separately Separating point Page 26
-14
Align exhaust system free of stress
Page 26
-24

21 -
Front muffler
Factory-installed with rear muffler as one
unit. If repair is necessary, replace
separately Separating point Page 26
-14
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Align exhaust system free of stress
Page 26
-24

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26-6


22 -
Support ring
23 -
Bolt
25 Nm (18 ft lb)
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26-7


All-wheel-drive vehicles

1 -
Front muffler
Factory-installed with rear muffler as one
unit. If repair is necessary, replace
separately Separating point Page 26
-16
Align exhaust system free of stress
Page 26
-24

2 -
Gasket
Always replace
3 -
Nut Always replace30 Nm (22 ft lb)
4 -
Gasket Always replace
5 -
Turbocharger Removing and installing Page 21
-30
6 -
Three Way Catalytic Converter (TWC)
Protect from damageRemoving and installing Page 26
-21
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