UPDATE:

"If it ain't broke don't fix it!"

So I located the danged petcock. About the worst design to get access to I ever have seen! It is actually a big PLASTIC screw! Can't get any kind of driver to get it off. Had to push and bend hoses/pipes to get pliers unto it. Finally got it off (2nd day now on this which should be minor operation!) The danged thing now is bound 1/2 way back into the radiator! Now I have a leak and cannot tighten it down or take it out! What a big disappointment!

Other than spending all next weekend removing the radiator,and everything else along with it,

does anyone have a fix it idea - like some kind of water proof goop?

I can permanently seal it. There is a small heater hose that can easily be removed with only one clamp that will drain the coolant system.