1996 AUDI A4 AFC Engine Cooling System Components

- Continue running engine at idle until radiator becomes hot at the
bottom connection.
Pa
ge 9 of 12 Coolin
g system, com
ponents
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19-10

WARNING!

The cooling system is pressurized when the
engine is warm. Wear gloves and other
appropriate protection, and slowly and
carefully release system pressure, if
necessary, before performing repairs.

- Check coolant level in expansion tank and top
up if necessary.

- Stop engine (switch ignition off).
Pa
ge 10 of 12 Coolin
g system, com
ponents
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
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pair&id=AUDI.B5.GE01.19.2

19-11

Cooling system leaks, checking


WARNING!

The cooling system is pressurized when the
engine is warm. Wear gloves and other
appropriate protection, and slowly and
carefully release system pressure, if
necessary, before performing repairs.

Engine must be at operating temperature

If the pressure drops: - Connect cooling system tester VW 1274 to expansion tank using
adapter VW 1274/1.
- Operate hand pump on tester to create a pressure of approx. 1 bar (15
psi).
- Locate and repair leak in the cooling system.
Pa
ge 11 of 12 Coolin
g system, com
ponents
11/21/2002 htt
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yp
e=re
pair&id=AUDI.B5.GE01.19.2

19-12

Expansion tank cap, pressure testing


- Screw cap onto cooling system tester VW 1274 with adapter VW
1274/1.
- Operate hand pump to build pressure.
- Pressure relief valve must open at 1.2-1.5 bar (17-22 psi).
Pa
ge 12 of 12 Coolin
g system, com
ponents
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE01.19.2