Check this one out, my 85 toyota 22re has a new engine with a new rad,thermo stat,water pump. runs great idlse all day and around town no problems but as soon as i get on the high way at 70 it will over heat, guage goes up but never seem to boil over, I drove with the guage in the red and though for sure it was going to blow. once you slow down from the high way it cools down. poor truck just hates to go fast <img src="/forums/images/graemlins/lol.gif" alt="" /> So what could be wrong, I used a 22r block and I dont think i put a temp sending unit in?? were should it be? also could the fan clutch be slipping at high speeds but then i would think the air moving through would keep it cool anough. anyone have any ideas? I drive 65 mile one way and really need this thing fixed.
thanks