AUDI A4 2000 B5 / 1.G AFC Engine Cooling System Components

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
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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