thermostat AUDI TT 1996 8N / 1.G AEB ATW Engines Cooling System Components Workshop Manual

19-3


8 -
Radiator
Removing and installing Page 19
-24
After replacing, replace coolant
9 -
Upper coolant line
10 -
Coolant pump/coolant thermostat Coolant pump, removing and installing
Page 19
-13

Check for ease of movementCoolant thermostat, removing and installing
Page 19
-20

Checking Page 19
-21
11 -
Turbocharger
12 -
Cylinder head/cylinder block
After replacing, replace coolant
13 -
Connector
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19-11


Coolant pump and coolant thermostat,
servicing

1 -
Bolt
M6: 10 Nm (7 ft lb)M8: 20 Nm (15 ft lb)
2 -
Lower toothed belt cover Removing and installing Page 13
-29
3 -
Nut
10 Nm (7 ft lb)
4 -
Coolant pump Removing and installing Page 19
-13
Check for ease of movement
5 -
Gasket Always replace
6 -
O-ring Always replace
Pa
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g system com
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g
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.GE02.19.1

19-12


7 -
T-head bolt
Insert before installation
8 -
Coolant thermostat Removing and installing Page 19
-20
Checking Page 19
-20
9 -
Connector
10 -
Drain plug
30 Nm (22 ft lb)
11 -
O-ring Always replace
12 -
Belt pulley Installed position: flat pulley half faces
coolant pump
13 -
Socket-head bolt 25 Nm (18 ft lb)
Pa
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11/18/2002 htt
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19-15

Note:
Power steering pump remains installed.

- Pull off coolant hoses from coolant pump and
coolant thermostat housing.

- Unbolt coolant pump housing from toothed belt cover (arrow).
- Remove coolant pump.

- Unbolt impeller housing -1- from pump housing -4-.
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11/18/2002 htt
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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)
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11/18/2002 htt
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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