Edmunds Answers



  • karjunkie 02/02/10 9:20 am PST

    Normally I would suspect the ECT sensor, but you changed that. The only other thing that comes to mind is air in the cooling system. Have you checked the level since you changed the thermostat? With a cold engine, remove the radiator cap and check the coolant level. If it is low, top it up and with heater turned to maximum, start engine. Top up coolant if the level drops and when coolant level stabilises, close radiator cap and bleeding should be complete. Now if that does not cure the problem, the only other thing left is that the water pump is begining to fail and is not circulating the coolant with enough force to keep the pressure up, thereby causing momentary overheating that you describe.


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