heater AUDI A4 1999 B5 / 1.G AHA ATQ Engines Cooling System Components Workshop Manual
Page 11 of 40
19-9
Coolant hose connection diagram
1 -
Lower coolant hose
From radiator to engine
2 -
Cylinder head/cylinder block
3 -
Intake manifold
4 -
Coolant line From heat exchanger to engine block
5 -
Heater core
6 -
Coolant hose To heat exchanger
7 -
Rear coolant line
8 -
Expansion tank
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Page 17 of 40
19-14
- Replace coolant drain plug O-ring and install
coolant drain plug into engine.
Tightening torque: 20 Nm (15 ft lb).
- Install lower right coolant hose and secure with
retaining clip.
- Secure coolant drain valve to radiator.
- Screw VAG1274/9 onto expansion tank and insert VAG1274/10 into
adapter.
- Loosen clamp on coolant hose on heater core and pull back hose until
bleeder hole in coolant hose (arrow) is no longer sealed by connection.
- Top off coolant until it flows out from bleeder hole in coolant hose.
- Push coolant hose onto connection and tighten.
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Page 18 of 40
19-15
- Loosen bleeder screw on lower coolant line (arrow) under expansion
tank (if necessary, unbolt expansion tank).
- Top off coolant until it flows out from bleeder screw.
- Close bleeder screw and tighten to 20 Nm (15 ft lb).
- Loosen bleeder screw on front coolant line (arrow) between power
steering pump and left-side of cylinder head.
- Top off coolant until it flows out from bleeder hole in coolant line.
- Close bleeder screw and tighten to 20 Nm (15 ft lb).
- Top up coolant to MAX mark.
- Install coolant expansion tank cap.
- Set heater controls to maximum heat position.
- Start engine and let run at idle for approx. 10 minutes.
Pa
ge 18 of 40 Coolin
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ponents, removin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.GE03.19.1