ok to keep this thread going i have a question... yesterday my truck started to overheat in the mcdonalds drive thru so i shut it off and let it cool down for a while and then drove it home and it ran 200 degrees all the way home which is fine so this morning i go outside to put some antifreeze in it because i figured it must have leeked out or somethin which caused it to overheat and it didnt take much fluid so i decided to check my oil too and it was milky like lots of water was in there, so i figured i had a blown head gasket cuz i started it up and let it run for a while and then shut it off and and it blew the overflow cap off so it was building pressure in there. so i pulled the head and gasket and the gasket doesnt even look blown???  i dunno what else would cause this pressure in there?? and water in the oil??? cracked head or block maybe i dunno...