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Re: Rear Heater Core
I'm puzzled at how the AC is related to the heater core? they seem to be independent systems. did you mean the coolant? if you meant the coolant, yes, it does need to be drained since the coolant runs through the heater core and replacing it without draining the coolant will be messy no doubt about it.
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2003 Windstar LX
1998 4dr Civic LX
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