Actually my rad was flushed! The reason my thermistat sticks open when it does stick is because it is a fail-safe thermistat.My thermista has just reached the end of its life. Instead of sticking closed and temps going sky hi and blowing engine, the thermistat is designed to stick open and coolant runs more and temp gage reads low temp! (Still not good) This will eventually distroy your waterpump with too much usage!Instead of me doinmg another flush and replace the thermistat now, I am just doing a test to see if there is in fact a cheaper alternative to fixing the thermistat from sticking. But 600km+ and still no problem with thermistat sticking after Dura Lube cooling system add.
