good cause antifreeze will kill all the bearings in your motor, looks like your gonna have to tear it apart and double check everything, the first time I started mine up it got real hot over 220 so I shut it down, then someone told me to use a hose and run cold tap water over the radiator to keep it cool during the cam breakin so that's what I did and I ran it for about 30 minutes with no more heat issues, hope that helps some...
