A8L V8-4.2L (BFM) (2004)
Heater Control Valve: Service and Repair
Pump Valve Unit
Refrigerant Circuit
Pump Valve Unit
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Remove pump valve unit. Refer to => [ Pump Valve Unit, Checking ] See: Testing and Inspection/Pump Valve Unit, Checking.
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Remove bolts - A -.
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Remove coolant pipes:
‹› Pipes - C - to front passenger's heater core
‹› Pipes - D - to driver's heater core
‹› Replace O-ring seals - B -.
‹› Coat O-ring seals with refrigerant before inserting.
‹› Insert rubber bushings - E - into pump valve unit and into bracket - F -, as shown in illustration.