Hello Yall,
I found out there were several tests I could run to determine whether I have a blown head gasket. So far I ran 2 and they both were negative. I refilled the radiator (I drained it two months ago), and had no issues at all starting the VX and driving it around the neighborhood...It drove like new! No shaking, missing, or hesitation. I am very optimistic it is the thermostats. I need to run the gas test and the compression tests to be sure. But so far no antifreeze in the oil, and no white residue on the bottom of the oil cap, and no gases detected when the radiator cap is removed, all of which would indicate a blown head-gasket if they were present...Knocking on wood, the remaining two tests will be negative as well. I'll run the tests this weekend!