Audi TT (2007 year). Manual — part 56
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Using a commercially available connection piece, connect
charge air system tester -V.A.G 1687- to compressed air -1-.
Note
If there is water in sight glass, remove drain plug -6- and drain
water.
– Open valve -3-.
Caution
Risk of damage if pressure is set too high.
♦ The pressure must not exceed 0.5 bar.
– Adjust pressure to 0.5 bar via pressure control valve -2-.
– Open valve -4- and wait until test system is pressurised. If
necessary, adjust pressure to 0.5 bar again.
– Check charge air system for audible leaks or leaks that can be
felt with the hand; apply commercially available leak detecting
spray or use ultrasonic tester -V.A.G 1842- .
Note
♦
A small amount of air escapes through the valves and enters
the engine. Therefore it is not possible to perform a pressure
retention test.
♦
For operation of ultrasonic tester -V.A.G 1842- , refer to ⇒
Operating instructions .
♦
Release pressure in test circuit by detaching hose coupling
from adapter before removing adapter.
♦
Hose connections and air pipes and hoses must be free of oil
and grease before assembly.
♦
Secure all hose connections with the correct type of hose clips
(same as original equipment) ⇒ Electronic parts catalogue .
♦
To ensure that the air hoses can be properly secured at their
connections, spray rust remover onto the worm thread of used
hose clips before installing.
2. Charge air cooling
215
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
26 – Exhaust system
1
Silencers
Note
♦
After working on the exhaust system, ensure that the system
is not under stress and that it has sufficient clearance from the
body. If necessary, loosen clamp and align silencers and ex‐
haust pipe so that sufficient clearance is maintained to the
body at all points and the mountings are evenly loaded.
♦
Use screwdriver to unfasten and tighten lock washers for heat
shields. Tightening torque: 2 Nm.
1.1
Silencers - exploded view
1 - Centre silencer
❑ Combined with rear si‐
lencer
❑ Align exhaust system so
it is free of stress
2 - Rubber mounting
❑ Renew if damaged
3 - Rubber mounting
❑ Renew if damaged
4 - Bracket
5 - Bolt
❑ 23 Nm
6 - Mounting
❑ Renew if damaged
7 - Nut
❑ 23 Nm
8 - Bracket (bottom)
❑ For particulate filter
9 - Nut
❑ 23 Nm
10 - Bracket (top)
❑ For particulate filter
11 - Bolt
❑ 23 Nm
12 - Nut
❑ 23 Nm
13 - Nuts
❑ 9 Nm
216
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
14 - Heat shield
15 - Clamp
❑ For particulate filter
❑ Renew
❑ Installation position
❑ 7 Nm
16 - Seal
❑ Renew
17 - Particulate filter
❑ After renewing, perform “Adaption” in “Guided Functions” ⇒ Vehicle diagnosis, testing and information
system VAS 5051.
18 - Clamp (front)
❑ Before tightening, align exhaust system so it is free of stress
❑ Installation position
❑ Tighten bolt connections evenly
19 - Nut
❑ 23 Nm
20 - Bolt
❑ 23 Nm
21 - Rubber mounting
❑ Renew if damaged
22 - Bracket
23 - Nut
❑ 23 Nm
24 - Bolt
❑ 23 Nm
Installation position of front clamp
– Fit the clamp at the angle shown.
• Angle -α- = approx. 20°
• Bolt connections facing towards right
• Nuts facing upwards
1. Silencers
217
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Installation position of clamp for particulate filter
• Angle -α- = 0 ± 10°
1.2
Removing and installing particulate filter
Special tools and workshop equipment required
♦ Engine support -3300 A-
sender 2 -G448- and move wiring clear.
Note
Disregard -items 1, 2, 4-.
– Slacken bolt -2- and remove clamp.
Note
Disregard -items 1, 3-.
218
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