Radiator pressure
Not sure if this will make a difference but the radiator was recently install along with the new thermostat. I opened the radiator cap with the front end elevated in hopes of burping the air out. The radiator still was holding pressure from a drive earlier in the day. I had to add at least a 1 1/2 gallons of coolent water mixture. After topping it of I went out for a short drive the temp never made it over 180 but the upper and lower hoses were rock solid with pressure again. I must have a bad head gasket.[/u]