Tstst only tells the system when to open....down in hot Texas I ran 200-210-up to 220F in the summer for 10 yrs....it would be 180-190 in "winter".... I just replced my radiator to a large 3 core aluminum and it brought my 220F down to 190F at 80-85 mph...in 85-95F weather.
running 190-200 is not too hot....if it stay there... what does it run in same temperatures in idle and in speed? like 80 mph?
