A6 Quattro Sedan V8-4.2L (BVJ) (2007)
Cabin Ventilation Grille: Service and Repair
Air Intake Unit, Removing and Installing
Air Intake Unit, Removing And Installing
Special tools, testers and other items required
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Hose Clamps Up To 25 mm Dia. 3094 or Hose Clamps, Up To 40 mm. 3093
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Commercially available compressed-air gun
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Cooling System Tester V.A.G 1274 (and appropriate adapters)
Removing
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Switch off ignition.
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Dissipate pressure in coolant circuit by opening cap at coolant expansion tank Relevant engine, mechanics.
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Remove plenum chamber cover.
CAUTION: The two valves of the pump valve unit may be hot even if the engine is cold.
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Remove wiper arms and scuttle panel trim.
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Remove wipers and unclip drip rail from air intake unit.
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Remove dome brace if necessary (not installed on all vehicles).
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Remove Alarm Horn H12.
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Remove Air Quality Sensor G238 if applicable.
Pinch off coolant hose - C - (supply from engine to Coolant Pump V50 ) e.g. using Hose Clamps Up To 25 mm Dia. 3094.
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Pinch off coolant hose - A - (return from heater core to engine), e.g. using Hose Clamps Up To 25 mm Dia. 3094.
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Disconnect coolant hose - C - from connection at Heating and A/C unit and lay aside.