Q7 Quattro V6-3.6L (BHK) (2007)
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Check foam seals - C - at heater core - A -, they must be glued all around without gaps and must not be damaged.
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Insert heater core - A - on proper side into lower air duct - B -.
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Install heater core - A - with lower air duct - B - into heating & A/C unit - D -.
‹› While inserting, make sure that groove/spring connection between heating & A/C unit - D - and lower air guide - B - is joined correctly.
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Insert retaining pin - A - for connecting lower air duct - C - to heating & A/C unit.
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Turn retaining pin - A - into locking mechanism - B -
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Install bolts - D -.
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Moisten new O-ring seals - D - (included in heater core delivery casing) lightly with coolant.