1998 AUDI A4 transmission

26-7


- Unbolt heat shield -2- on turbocharger.
- Remove upper bolt -3- securing front exhaust pipe to turbocharger.

- Unbolt guard plate -arrows- above drive shaft from transmission.
- Unbolt drive shaft -1- at transmission and tie up.
Pa
ge 7 of 30 Exhaust s
ystem com
ponents, removin
g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.1

26-9


- Remove transmission support -arrows-.
- Loosen exhaust system clamp and push clamp towards muffler.

Note:
Avoid excessive bending of the flexible pipe connection (de-coupling
element) on the front exhaust pipe. The angle between the catalytic
converter and the front exhaust pipe must not exceed 10 , otherwise the
flexible connection will be damaged. - Loosen hose clamp -1- on turbocharger heat shield.
- Unbolt exhaust pipe -2- from turbocharger.
Pa
ge 9 of 30 Exhaust s
ystem com
ponents, removin
g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.1

26-11

Exhaust system, aligning free of stress

Align the exhaust system as follows to avoid
stresses in the system and prevent the
transmission of noise into the body:

Notes:

Before assembling the exhaust system, the
front exhaust pipes and the catalytic converters
must be aligned accurately and secured.
Loosen all bolted connections on the exhaust
system (except exhaust manifold and flange
mountings, catalytic converter/intermediate
pipe).
The exhaust system must be aligned when it is
cold.
Keep to the sequence described below.
The dimensions in the illustrations are
approximate.
Pa
ge 11 of 30 Exhaust s
ystem com
ponents, removin
g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.1

26-18

Tightening torques

Bolted mountings Tightening
torques
Exhaust pipe between exhaust
manifold and turbocharger 25 Nm
Exhaust pipe with catalytic
converter to turbocharger 25 Nm
Exhaust manifold to cylinder
head 25 Nm
Exhaust pipe to transmission 25 Nm
Catalytic converter to front
muffler 25 Nm
Heat shield to turbocharger 10 Nm
Pa
ge 18 of 30 Exhaust s
ystem com
ponents, removin
g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.1

26-29


- Disconnect both connectors -2- from control modules for exhaust gas
temperature.
- Remove control module from intake manifold and set wires aside.

For vehicles with manual transmission, the control modules for exhaust
gas temperature are at rear of intake manifold, on left and right.
Pa
ge 29 of 30 Exhaust s
ystem com
ponents, removin
g and installin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE05.26.1