1998 AUDI A4 radiator

19-3


1 -
Radiator
Removing and installing Page 19
-26
After replacing, replace coolant in complete
system
2 -
Securing clip
3 -
Securing rubber
4 -
O-ring Replace if damaged
5 -
Bottom coolant hose Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections
Page 19
-17

6 -
Rubber washer
Pa
ge 4 of 34 Coolin
g system 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.GE05.19.1

19-4


7 -
Retaining bolt
8 -
Nut
Tightening torque: 10 Nm
9 -
Fan ring Clipped into air ducting and secured with
retaining bolt -Item 7 -
10 -
2-pin connector
11 -
Radiator fan (-V7-)
12 -
Connector Black, 3-pinFor radiator fan thermoswitch
Pa
ge 5 of 34 Coolin
g system 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.GE05.19.1

19-5


13 -
Radiator fan thermoswitch (-F18-), 35 Nm
For electric fan
Switching temperatures: Stage 1on: 92...97 Coff: 84...91 C
Switching temperatures: Stage 2
on: 99...105 Coff: 91...98 C
14 -
Seal
Always replace
15 -
Drain screw Tightening torque: 10 Nm
16 -
Top coolant hose Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections
Page 19
-17

Pa
ge 6 of 34 Coolin
g system 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.GE05.19.1

19-6


17 -
Bolt
Tightening torque: 5 Nm
18 -
Mounting rod
19 -
Guard plate
20 -
Bolt Tightening torque: 5 Nm
21 -
Bolt Tightening torque: 5 Nm
22 -
Radiator Removing and installing Page 19
-26
After replacing, replace coolant in complete
system
Pa
ge 7 of 34 Coolin
g system 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.GE05.19.1

19-10


10 -
Top coolant hose
Secured to radiator with retaining clipCheck for secure seatingDiagram of coolant hose connections
Page 19
-17

11 -
Coolant line
Diagram of coolant hose connections
Page 19
-17

12 -
Rear toothed belt guard
13 -
Gasket
Always replace
14 -
Coolant pump Check that pump runs freelyIf damaged or leaking replace completeRemoving and installing Page 19
-29
Pa
ge 11 of 34 Coolin
g system 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.GE05.19.1

19-12


23 -
Bolt
Tightening torque: 10 Nm
24 -
Fan wheel for viscous fan
25 -
Viscous fan coupling Note left-hand threadTightening torque only applicable when
using open-end spanner 3312 Tighten to 37 Nm
26 -
Bolt Tightening torque: 25 Nm
27 -
Bracket For viscous fan
28 -
From bottom of radiator Diagram of coolant hose connections
Page 19
-17

Pa
ge 13 of 34 Coolin
g system 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.GE05.19.1

19-17


Coolant hose connections, diagram

1 -
Bottom coolant hose
From radiator to engine
2 -
Cylinder head/ cylinder block
3 -
Right turbocharger
4 -
Auxiliary water pump
5 -
Heat exchanger for heater system
6 -
Coolant hose To heat exchanger
7 -
Left turbocharger
Pa
ge 18 of 34 Coolin
g system 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.GE05.19.1

19-18


8 -
Rear coolant line
9 -
Cap for expansion tank
10 -
Expansion tank
11 -
Oil cooler
12 -
Radiator
Removing and installing Page 19
-26
After replacing, replace coolant in complete
system
13 -
Coolant pump
14 -
Connection For thermostat
Pa
ge 19 of 34 Coolin
g system 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.GE05.19.1