well....ive got a 1990 legacy 2.2 fi.......with a problem.......i rebuilt heads( they had to weld due to some pretty bad electrolosis)......installed by the book......new radiator as old was clogged, new hoses, new 170 thermostat......new 13 lb cap......flushed etc......water jackets clear, & water pump appears to work.......i live @ 5700+ ft, drive it for about 15 @ 60mph, then find coolant down about 1 1/2" in rad, it never drops lower than that. when i slow down from 60 temp goes up to just under overheat........rev motor it cools down, if i drive in 2nd for a bit it cools down to normal. if i take car to sea level or so......it runs fine doesn't lose water or overheat.........does anyone have any ideas? 18 lb rad cap? help!!! thanx in advance dan