1998 AUDI A6 ect

19-17

Radiator, removing and installing


Removing

- Remove front bumper.

Repair Manual, Body Exterior, Repair Group
63


- Drain coolant at drain plug (arrow) page 19
-11
.

Vehicles with automatic transmission - Disconnect coolant hoses at radiator, unhinge clamp from connection
flange (arrow).
- Disconnect connector from temperature switch at bottom-left of
radiator.
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.GE03.19.1

19-18

All models

Vehicles with air conditioning
CAUTION! - Unbolt power steering hydraulic oil cooling line (arrows).
DO NOT open the air conditioning refrigerant circuit.Disconnect A/C refrigerant lines at brackets and support points
only. Avoid damage from bending. Refrigerant lines kink easily.

- Unbolt air guides at radiator -4- on left and right-sides.
- Unbolt retaining bolts -1- and -2- from condenser.
- Disconnect harness connector -3- at A/C pressure switch -F129-.
- Pull condenser upward out of retaining bracket, swing to side and hang
at right-front wheel using wire loop.
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p://127.0.0.1:8080/audi/servlet/Dis
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pair&id=AUDI.B5.GE03.19.1

19-20

Coolant pump, removing and installing


Notes:

Always replace seals and gaskets.
Cover the toothed belt with a cloth to protect it
from coolant before removing the coolant pump.

Removing

- Remove front bumper.

Repair Manual, Body Exterior, Repair Group
63


- Move lock carrier into service position.

Repair Manual, Body Exterior, Repair Group
50


- Remove ribbed belt page 13
-8 .

- Remove toothed belt page 13
-12
.
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.GE03.19.1

19-23

Thermostat, removing and installing


Notes:

Always replace seals and gaskets.
Cover the toothed belt with a cloth to protect it
from coolant before removing thermostat.

Removing

- Drain coolant page 19
-11
.

- Remove front bumper.

Repair Manual, Body Exterior, Repair Group
63


Lock carrier in service position

Repair Manual, Body Exterior, Repair Group
50


- Remove ribbed belt page 13
-8 .
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE03.19.1

- Remove toothed belt page 13
-12
.

- Remove connection mounting bolts -1- and remove connection -2-.
- Remove thermostat -4-.
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p://127.0.0.1:8080/audi/servlet/Dis
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19-24

Installing
Installation is the reverse of removal, noting the
following:

Bleeder valve for thermostat (arrow) must be at the top.
- Install thermostat -4- into engine block.
- Moisten new O-ring -3- with coolant.

- Install connection -2- for thermostat and tighten bolt -1- to 10 Nm (7 ft
lb).
- Install and tension toothed belt page 13
-12
.
- Install ribbed belt page 13
-8 .
- Fill cooling system with coolant page 19
-11
.
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE03.19.1

19-26

Coolant fan, checking


Test requirements

Test procedure
Fuse No. 34 OK Coolant Fan Control (FC) thermal switch -F18- OK
- Disconnect 3-pin harness connector from coolant Fan Control (FC)
thermal switch -F18- at bottom left of radiator.
- Switch ignition on.

- Bridge terminal -1- and terminal -2- of harness connector using
auxiliary cables from VW1594 connector test kit.
Coolant fan -V7- must run on 1st speed.
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE03.19.1

19-27


If 1st or 2nd fan speed does not run:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
If no open circuit can be found: - Bridge terminal -1- and terminal -3- of harness connector using
auxiliary cables from VW1594 connector test kit.
Coolant fan -V7- must run on 2nd speed.
- Locate and repair open circuit using wiring diagram:- Replace coolant fan -V7-.
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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.GE03.19.1