I own a 2000 expedition Heat Core Has been Replaced Heat in Front and rear worked great! Had Intake Manifold Replaced if you block off rear heater hose lines great front heat if you block front heater hose lines great rear heat but with no blocking of lines rear heater works well luke warm air out of the front! I am thinking an air pocket in the system does any bobdy know a way to bleeded system or any other thoughts
First of all I would make sure the car has proper amount of coolant and you are right it is very possible you have an air pocket in the system also ask your self did you change the thermastat after you did the heater core when the car is cold make sure there is coolant at the cold mark on the reservior bottle because you might not have enough coolant then start the car and get it up to temp and if the coolant goes not go up to the hot mark when the car gets to temp you do not have enought coolant just keep adding coolant and you will see the bubble after the thermastat opens
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no heat when sitting still but when you rev. up the car it gets luke warm
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