The radiator was professionally cleaned over 1 years ago, only installed it about a month ago.
It is very strange when it over heats, I can start the truck and let it idle and the temp will go up to the point that the water comes out the overflow tube, I shut it off and replace the water, start it again and the temp will go to normal. (Around 130) Usually when it is under a load it seems to act up more.
I have never run the engine without the thermostat, I was told that I need the back pressure which it provides.
Should I try it without a thermostat before I remove any other parts?
DR
