So I suspect it is the cold weather here that is inducing my coolant
leaks, as I seem to have sprung a few more in different places over the
last few days of really cold temperatures.  I am worried that I may have
mixed my coolant percentage too low and I actually got freezing in the
coolant system.  I need to drain the oil and coolant anyway to remove
parts to get to the places that need tightening/checking, so hopefully
this plus some Bar's-Leak may solve my problem (at least until spring).
Thanks everyone for the tips/advice/past experiences.

aloha
Mike