well the plan worked - not sure what did the trick, but .... soooo much coolent came out I ducked out of the way .... Full bag of floor dry .... so happy ��
LOLOL! I bet a bag of floor dry would be needed to dry up a whole cooling system worth of coolant. In any case, good work, young man! I bet the warm engine let PB Blaster creep into the threads a little more and the MAP gas (great stuff) broke the Loctite free. Phew.
GL finding that little trophy - it has a good story associated with it. Mirror and groping are the right tools for the hunt.
As 'Thereaper' said, please post some pics of the finished project (block heater). Love the modding porn!