SteveD, and Kidwon, i feel your problem, i'm having the same problem! someone please tell me its not the head gasket- i've had two different mechanics look at my car, one of them has "burped" the system three times, eveyrtime telling me it ran for two hours great for him. But then i drive it to work and it starts to overheat. I've replaced the thermostat and the waterpump was replaced not too long ago, there is nothing leaking from the car, and all my mechanics are cooless as to what it could be. I'd rather trade it in than replace the head gasket- and i am just not conviced that it is b/c of the inconistancy of the overheating. Anyone have insite?