[DAVID GAGNARD]

Mike;

Try drilling a small hole (a little smaller than 1/4 inch) in the flange of the thermostat and when you instal it,make sure the hole is at the top,then fill the radiator with water,start the engine,let it run and warm up without the radiator cap on and go from there,this should help "burp" things and get rid of air pockets,as the thermostat opens and the water level goes down,refill as needed........

Hope this helps.......

PS: before installing thermostat,take in the house,put it in a pot of water on the stove and see if it actually opens or works,you may have gotten a defective thermostat,but the odds or you will not get two in a row,I always check mine in a pot of water before installing it on the engine.......

David