I have a 99 BMW 323is. I have been having problems with the car running hot. I have replaced all the obvious, radiator, thermostat, hoses, bled the radiator. It still is running hot. I am about to put another themostat on it because it now acts like it is stuck. Does anyone have the answer to this? I have some block seal I think I will run throught it when I get the thermostat on.