I have an 05 GT that runs hot after driving for about 30 mins or so. What happens is the gauge goes up about a quarter way past half way, but does not go all the way to "H". It eventually regulates itself and goes back to halfway (operating temp), and it will do this randomly after the car has been driven for 30 mins (so more than once per drive past 30 mins). This would apply to "city" driving only as I have not run it on the highway since this has started. I changed out the thermostat, and it does the same thing. I am hoping that the thermostat was defective out of the box because my mechanic looked at the car and said he cannot see anything else wrong with the cooling system. The thermostat used was a fail safe from Autozone, but I am picking up the OEM Motorocraft from Ford today. Per the mechanic, fans, hoses, air filter, radiator, coolant, etc all look good. No smoke coming from the exhaust and the oil is not mixing with the coolant so I ruled out the head gasket. No check engine light either...
This is driving me nuts, and hopefully one of you can help me with this!
This is driving me nuts, and hopefully one of you can help me with this!