Q7 Quattro V6-3.6L (BHK) (2007)
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Moisten new O-ring seals - D - (included in heater core delivery casing Parts Catalog) lightly with coolant.
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Insert new seals - D - on to coolant pipe connections - F -.
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Push both coolant pipes - B - and - C - into heater core connections - E -.
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Insert retaining clips - A - on proper side on to coolant lines - B - and - C - and heater core connections.
NOTE: Only use retaining clips of standard used in series production Parts Catalog
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Check retaining clips - A - on coolant pipes and heater core connections again for secure fit.
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Re-install both left and right covers on heater core and the remaining removed components in reverse order.
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Install front heating A/C unit