Well I got the overheating to quit (badly worn throttle shaft) after that I pulled the motor to replace the oil pan. I replaced the pan put new straight 30w oil in it, repaired the gaskets for the valve breather with rtv and put in new motor mounts, that was it. I got everything assembled started it and drove around for about a hour and put it back in the barn. Two days later I start it and it smokes so bad I could not see to get out of the barn, I quickly shut the tractor off and quickly got to fresh air, them waited for the white smoke to clear. I rolled the tractor outside started it again and it was the same loads of smoke, I started to drive it around and it got better but a solid flow of smoke still come out non stop, why would it start to do this overnight?