This is a tough one. I have a couple more questions. First, and I know this may sound odd, was the thermostat replaced with a 195 F thermostat? I have seen situations where lower temp t-stat was used, opened fully when the engine was at 165 and the coolant circulated so fast, it never had time to cool in the radiator. The reason that popped into my mind is because your car does the opposite of what most do. It overheats when driving rather than sitting.
Next, when it overheats, does it ever boil over where coolant is coming from the overflow? I ask because you could have a bad temp sending unit and you are not seeing the correct temp from in the car. They actually make a thermometer to check coolant temp in the radiator.
Finally, when it is overheating, has anyone checked to make sure that both the lower and upper radiator hoses are not collapsed? I have delt with hoses that will pinch shut at higher RPM's causing an overheat situation.
Let me know.
Tuesday, October 19th, 2010 AT 7:30 AM