heater AUDI TT 2000 8N / 1.G AEB ATW Engines Cooling System Components Workshop Manual
Page 2 of 34
19-2
Cooling system components
Coolant hose connection diagram
1 -
Heater core
After replacing, replace coolant
2 -
Lower coolant line Removing and installing Page 19
-22
3 -
Expansion tank
With capPressure relief valve in cap, checking
Page 19
-30
4 -
Oil cooler
Removing and installing Page 17
-7 ,
item 14
5 -
Intake manifold
6 -
Lower coolant hose
7 -
Upper coolant hose
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Page 8 of 34
If the radiator, heater core, cylinder head or
cylinder head gasket is replaced, completely
replace the engine coolant.
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Page 10 of 34
19-9
Vehicles with large cap
All models
Note:
To fill without using special tools, loosen coolant expansion tank and lift
approx. 100 mm (approx. 4 in.). - Screw VAG1274/8 adapter onto coolant expansion tank.
- Attach VAG1274/10 special tool to VAG1274/1 adapter.
- Remove grommet holding clip at heater core and pull back grommet.
- Loosen coolant hose on heater core and pull back hose sufficiently so
that bleeder hole (arrow) is no longer sealed by connection.
- Top up coolant until it flows out of coolant hose bleeder hole.
- Push coolant hose on connection and tighten.
- Install coolant expansion tank cap.
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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-.
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