My Ford Explorer 97, V8 5.0 get overheat after capo at minutes and them goes down after start the engine againg. The check gage ligth came on and the termostast going to h temperature. I'm remplace the radiator and i put new termostast, new upper hose, new bypass hose and the car still overheat. Any sujestion? Please help. Maybe is something wrong with the new radiator?