A8L Quattro Sedan V8-4.2L (AUX) (2001)
Auxiliary Water Pump: Service and Repair
Pump Valve Unit, Replacing
Pump Valve Unit, Replacing
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.
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Remove pump valve unit.
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Remove screws -A-.
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Remove bracket -B-.
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Remove coolant hoses (hoses -C- to heater core on passenger side, hoses -D- to heater core on driver side).
NOTE:
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Replace O-rings -E-.
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Insert rubber mounts -F- in the pump valve unit and in the bracket -G- as shown in the figure.