One day was driving and my radiator got hot and started smoking white and then i checked my oil and spark plugs to make sure the head gasket didn't break. And after i took my oil filler cap off and opened the throttle body butterfly valve, white smoke was coming out. Any ideas what it could be? Possibly was it burning oil because it got hot? the radiator pretty much blew all the coolant out of the overflow bottle to the point none was in it.