Radiator plugged internally. Radiator plugged with a butterfly collection. Red Dex-Cool antifreeze wasn't changed often enough. (We call that stuff "Dex-Mud"). Cooling fins on radiator corroded and crumbling away.
One of the more common causes of overheating is a leaking cylinder head gasket. Your mechanic can perform a chemical test to verify that. The water pump and thermostat are two of the least likely causes of overheating.
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Tuesday, July 11th, 2017 AT 10:30 PM