Now I am curious if running cold could be keeping the unit from seating in the rings properly. Hopefully the initial load testing hasn’t done any damage. At the time, I figured cooler was okay as long as coolant was circulating, which I knew it was, it just didn’t register with me in the mild weather but it should have. I should have mentioned it earlier, but thankful it was caught now and I appreciated it DieselAddict.I did touch the upper radiator hose today after 2hrs at load and it was hot but I could touch it without getting burned so after reading that the thermostats are either 165 or 190 (seen both listed as replacements), it seems as though my unit may be missing the thermostat or it’s stuck open. I will lookup numbers to figure out the correct temp thermostat and just replace it or add it. Hopefully I can find one locally.