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Lake Charles, LA
The engine runs at normal operating temperature (about 195 degrees) while on the highway. When I stop at traffic stops the engine temperature increases from 195 degrees to over 220 degrees then returns to normal when back on the highway. I have had the thermostat, radiator fan motor & radiator changed. I have had the engine and coolant expansion tank cleaned & flushed. The engine runs good and there is no indication that the head gasket is blown. The first time this happened almost three years ago, changing the fan motor resolved the problem. What else could be causing this heating up to occur?