Q7 Quattro V6-3.6L (BHK) (2007)
Heater Core: Service and Repair
Heater Core - Rear Heating A/C Unit Installed, Removing and Installing
Heater Core - Rear Heating A/C Unit Installed, Removing And Installing
Special tools and equipment
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Hose Clamps Up to 25 mm dia. 3094
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Cooling System Tester VAG1274 (hand pump and corresponding adapter)
Removing
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Switch off ignition.
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Release pressure in coolant circuit by opening cap on coolant expansion tank.
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Bring rear heating A/C unit into service position
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Remove Left Rear Air Flap Motor V239.
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Remove Right Rear Air Flap Motor V240.
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Remove bolts - A - and remove upper cover - B -.
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Mark both coolant hoses - A - and - B - to rear heater core - C - (risk of interchange).
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Clamp off both coolant hoses - A - and - B - to rear heater core - C - (e.g. using Hose Clamps Up to 25 mm dia. 3094).
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Pull heater core - C - out of heating A/C unit.
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Cover the area below heating A/C unit, where any coolant flowing out may reach, with absorbent paper (so that any coolant flowing out will not
flow on and into heating A/C unit or on to floor mat).
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Place a container under both connections to heater core - C - and disconnect both coolant hoses.
Installing
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Clean rear heating A/C unit (e.g. of coolant residue).