AUDI A3 1998 8L / 1.G AEB ATW Engines Cooling System Components Owner's Manual

19-18

Tightening torques

Component
Tightening
torques
Impeller to pump housing 10 Nm (7 ft
lb)
Pump housing to toothed belt
cover 10 Nm (7 ft
lb)
Bracket for generator, power
steering pump and viscous fan to
cylinder block 25 Nm (18 ft
lb)
Left brace for cylinder
block/bracket for generator, power
steering pump and viscous fan
to cylinder block 25 Nm (18 ft
lb)
to bracket M10 40 Nm (30 ft
lb)
Brace for torque support/bracket
for generator, power steering
pump and viscous fan
to torque support 25 Nm (18 ft
lb)
to bracket 20 Nm (15 ft
lb)
Intake duct support
Pa
ge 21 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

to intake duct 20 Nm (15 ft
lb)
to bracket 20 Nm (15 ft
lb)
Pa
ge 22 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-19

Component
Tightening
torques
Generator to bracket for
generator, power steering pump
and viscous fan
M8 25 Nm (18 ft
lb)
M10 40 Nm (30 ft
lb)
Belt pulley to coolant pump 25 Nm (18 ft
lb)
Viscous fan to bearing 45 Nm (33 ft
lb)
Pa
ge 23 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-20

Coolant thermostat, removing, installing
and checking


Removing

- Drain coolant Page 19
-4 .

Installing
WARNING!
The cooling system is pressurized when the engine is warm. When
opening the expansion tank, wear gloves and other appropriate
protection, cover the cap using a cloth, and open carefully to relieve
system pressure slowly.
Tightening torque - Remove bolts -4-, remove connector -3-, O-ring -2- and coolant
thermostat -1-.
- Clean and/or smooth O-ring sealing surface.
- Install coolant thermostat.
- Fill up with coolant Page 19
-6 .
Component
Tightening torque
Connector to pump housing 10 Nm (7 ft lb)
Pa
ge 24 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-21

Coolant thermostat, checking

- Warm thermostat in hot water bath.

Starts to
open Fully open
Stroke
approx. 87 C
(189 F)
approx. 102 C
1)
(216 F)
min. 8
mm
(0.315 in.)
1) Cannot be tested.
Pa
ge 25 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-22

Coolant line (lower), removing and
installing


Removing

- Drain coolant Page 19
-4 .

- Remove intake air duct between intake manifold
and charge air cooler.

- Remove hose -4- to oil cooler at lower coolant line -2-.
- Remove hose -5- to heater core at lower coolant line.
- Remove lower coolant line from hose -1- at coolant pump.
- Unbolt lower coolant line from oil filter bracket -3-.
Pa
ge 26 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-23

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

- Fill with coolant Page 19
-6 .

WARNING!

The cooling system is pressurized when the
engine is warm. When opening the expansion
tank, wear gloves and other appropriate
protection, cover the cap using a cloth, and
open carefully to relieve system pressure
slowly.
Pa
ge 27 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-24

Radiator, removing and installing


Special tools and equipment
VAG1306 drip tray

Removing

- Remove front bumper.

Repair Manual, Body Exterior, Repair Group
63


WARNING!
The cooling system is pressurized when the engine is warm. When
opening the expansion tank, wear gloves and other appropriate
protection, cover the cap using a cloth, and open carefully to relieve
system pressure slowly. - Unbolt cooling pipe for power steering hydraulic oil (arrows).
- Place VAG1306 drip tray underneath engine.
- Open coolant expansion tank cap.
Pa
ge 28 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-25


- Turn radiator drain plug (arrow) counterclockwise; if needed attach
accessory hose to connection flange.

Vehicles with automatic transmission
Repair Manual, 5 Spd. Automatic Transmission 01V, Repair Group 37
- Remove coolant hoses at radiator and remove clip from connecting
flange (arrow).
- Remove ATF lines from radiator.
Pa
ge 29 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1

19-26


Note:
Make sure fender is protected against possible damage. - Remove bolts -4- for air guides at radiator on left and right sides.
- Remove 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.

- Unlock both radiator retaining bolts and pull upward to remove
(arrows).
- Tilt radiator forward and remove toward top.
Pa
ge 30 of 34 Coolin
g system com
ponents, removin
g and installin
g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.19.1