I would suggest you start a new thread for the coolant leak to keep things organized.
in the mean time if the threads on the bolt are gone and there is coolant leaking there, that is most likely a BIG part of the problem.
What part of Utah are you in?
There may be members in the area who wouldn't mind spending a day with you going over some of the things.
as for the bolt. post a photo of the bolt out of the hole.