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One thought-Some cars can develop air locks in the cooling sytem causing weird temperature reading and poor heater performance, this will happen anfter maintenance is done on the system and the coolant is drained and replaced, the older Chrysler 2.2 engines were terrible for it, to fix it on the chysler 2.2's you simply needed to jack the nose of the car way up and run the car for a while with the heater cranked and the radiator cap off to let all the air bubbles out ( raising the nose of the up makes the radiator the highest point of the cooling system and the air bubbles will always rise to the highest point).Another possibilty is that the headgasket has a small leak and is allowing combustion gases to get into the cooling system passages, I hope its just an air lock because replacing a headgasket around Christmas sucks. Hope its an easy fix, have a merry Christmas.
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∙ 12y ago
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