IMO the purpose of a thermostat is to keep coolant in the radiator long enough for it to dissipate the heat. I run a hotter thermostat and it keeps my engine cooler. If the upper o-ring was missing it could potentially rattle around and let coolant past before it has a chance to cool. It would be a restriction either way and probably wouldn't matter in the grand scheme of things.
aka Mike D.----->Bio Page KDřGWY
“He who goes unarmed in paradise had better be sure that that is where he is.”—James Thurber
"Its better to be thought a fool rather than to speak up and remove all doubt." - Lincoln
pride is ego, the word I had lost was dignity. The quality or state of being worthy of esteem or respect.
Ptarmigan build thread - 95FZJ80