didn't do anything with it yesterday, because I couldn't get an extractor. today me and a buddy broke the extractor, ran through a couple of drill bits getting that delt with, tapped a new fitting for a m10x1.25 bolt, got it sealed up, and am letting that cure tonight to see if that was what was needed. looks like the old thermostat wasn't opening fully when we played with it, once we got it out.

see how it goes tomorrow.