No over heating problem. I had one before, till I changed the radiator cap. So not anymore, and that is pretty good with a 1700 which has no water pump. Was out again today, and no problem, it was just a one time thing. so I think it was probably from lugging a little and then I probably got on it a little quick and like one guy said with the sun and shade it was probably black smoke, but looked white, in the lighting I had at the time.