I have been listening to copus and G Dane talk about overheating problems and have <br />learned a lot. It sounds like there are 2 different water jackets. One of which water<br /> flows around the cylinders and one that flows thru the head jacket. it also sounds <br />like the Thermostat controls water thru the head jacket<br />where the heat sensor sits. The Thermostat controls the water and the temperature<br />thru this jacket. Thats why when the engine is off and cold water flows freely thru the <br />cylinder block. Its wide open! <br /><br />Let me know if I have it right so far - Thanks! 