A8L Quattro Sedan V8-4.2L (AUX) (2001)
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Secure all connections using clamps appropriate for the model type:
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Always replace gaskets and sealing rings -D-.
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Lightly cover sealing ring -D- with coolant.
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Check coolant system for proper seal before installing glove compartment:
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Check position of the grommet in the opening of the coolant lines to plenum chamber before installing the glove compartment and the plenum
chamber cover.
NOTE:
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Coolant pump -V50- of pump-valve unit must only be operated after the coolant circuit has been vented.
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Dry operation of the pump-valve unit leads to destruction.
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Connect 2-pin harness connector to pump-valve unit only after venting the coolant circuit:
Version "2" heater core, installing
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Before installing the heater core, check openings -A- of condensation water drain for soiling and clean if necessary.
NOTE:
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Condensation water drain valve must not be obstructed by wax or underbody sealer and must close properly.
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The drain openings in the illustration are depicted with the heater cores installed.
Cleaning:
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Removed: Both drain openings can be checked and if necessary cleaned via the opening for the heater core, using an illuminated angled mirror.