[Badger]

Randy...air entrapped anywhere in the engine will lead to over heating. The ideal thing is to install small air-bleed petcocks at your top hose on the radiator (or any other high spot in the system) so you can modulate and control the amount of water and air moving through that hose. quick and dirty you can just raise nose of the car as far as possible so the top hose is the highest palace on the system. Then crack that hose loose (just enough so water and air will flow out) and run the engine. when you get bubbles of air you'll know you've made progress. Badger