coolant AUDI A6 1998 C5 / 2.G AEB ATW Engines Cooling System Components Owner's Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1998, Model line: A6, Model: AUDI A6 1998 C5 / 2.GPages: 34, PDF Size: 0.54 MB
Page 25 of 34
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
Page 26 of 34
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
Page 27 of 34
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
Page 28 of 34
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
Page 29 of 34
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
Page 31 of 34
19-27
Installing
Installation is the reverse of removal, noting the
following:
- Fill up 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.
Tightening torques
Component
Tightening torques
Condenser to radiator 10 Nm (7 ft lb)
Coolant line to radiator 10 Nm (7 ft lb)
Pa
ge 31 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
Page 32 of 34
19-28
Cooling system, pressure test
Special tools and equipment
VAG1274 cooling system tester
VAG1274/1 adapter or VAG1274/8 with
VAG1274/9
Test condition:
Engine at operating temperature
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.
- Open coolant expansion tank cap.
Vehicles with small cap
- Using VAG1274/1 adapter, attach VAG1274 cooling system tester to
coolant expansion tank.
Pa
ge 32 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
Page 33 of 34
19-29
Vehicles with large cap
All models - Using VAG1274/8 adapter, attach VAG1274 cooling system tester to
coolant expansion tank.
- Use tester hand pump to create approx. 1.0 bar (14.5 psi) pressure.
- If pressure drops, check for leaks and repair.
Pa
ge 33 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
Page 34 of 34
19-30
Pressure relief valve in cap, checking
Vehicles with small cap
Vehicles with large cap - Using VAG1274/1 adapter (2 parts), attach VAG1274 cooling system
tester to coolant expansion tank cap.
- Pump using hand pump.
Pressure relief valve must open at 1.2-1.5 bar (17.4-21.75 psi).
- Using VAG1274/9 adapter attach VAG1274 cooling system tester to
coolant expansion tank cap.
- Pump using hand pump.
Pressure relief valve must open at 1.4-1.6 bar (20.3-23.2 psi).
Pa
ge 34 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