1998 AUDI A4 ECU

21-52


CAUTION!
The air conditioner refrigerant circuit must not be opened. - Loosen bolts securing ribbed belt tensioning roller for A/C compressor -
arrows-. Loosen belt and remove.
- Disconnect A/C compressor from bracket and secure to body with wire.

- Remove bracket for exhaust turbocharger -2-.
- Unscrew oil return line -1- from exhaust turbocharger and set aside.
- Loosen air duct hoses -4- and -5- on exhaust turbocharger.
- Remove banjo bolt -3- for pressure line.
Pa
ge 9 of 22 Char
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ystem with exhaust turbochar
ger, servicin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.21.3

21-57

Installing
Installation is carried out in the reverse order of
removal; note the following:

Note:

All cable ties which are released or cut open
when removing must be installed in the same
position when installing.
Secure all hose connections with the correct
hose clips (same as original equipment):

Parts Catalog

The hose connectors and hoses must be free of
oil and grease before assembling.
Always replace seals, gaskets and self-locking
nuts.

- Perform following operating steps before
tightening exhaust turbocharger:

-
Fasten coolant feed line loosely to bracket on
vacuum unit for wastegate bypass regulator
Pa
ge 14 of 22 Char
ge pressure s
ystem with exhaust turbochar
ger, servicin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.21.3

valve.

- Tighten banjo bolt to 35 Nm and then tighten
securing bolt of bracket to 10 Nm.
Pa
ge 15 of 22 Char
ge pressure s
ystem with exhaust turbochar
ger, servicin
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.GE06.21.3

21-60


Charge air cooling system components,
removing and installing

Note:
Parts Catalog
Secure all hose connections with the correct
hose clips (same as original equipment): Before a check or repair all hoses and lines
must be checked for correct seating and leaks.
1 -
Air duct
2 -
Rubber grommet
3 -
Hose
Between charge air cooler and air ducting
in front apron
Pa
ge 19 of 22 Char
ge pressure s
ystem with exhaust turbochar
ger, servicin
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.GE06.21.3