[grey88gt]

Not trying to start an argument here, just curious. How does the coolant cause the engine to run hotter? If you run str8 water your boiling point is at 212 deg. There for any engine temp above 212 deg your water is turning into steam and there fore your engine is now reallly overheating, because your water pump cant pump steam. If you have antifreeze you raise the boiling point of water. Iam looking at a generic brand of antifreeze here . It says 40% mix will give you a -10 protection and raise the boiling point to 259 deg. (i am sure diffrent brands will have diffrent figures) . My car is all stock and has never run hot. About a week ago I blew a hose racing. Filled the car back up with just water to get home and the car run about 25 deg hotter. Put new hoses on filled back up with 50% mix and it run the same temp it always has. Any way just my to cents and it gets dang hot here 100+ sometimes and 90% plus humidity. Buy the way if youll drill a 1/8 hole in the outer part of the thermostat itll help vent the air out of the system when filling with coolant.