My coolant has over flowed before. When I turn the truck off my coolant bubles in the bottle. The truck have been studded and has an mishimoto rad. It also has a coolant filtration system. I know this problem can be caused by an Kim head gasket or the head being lifted under boost pressure. My eot and etc run around the 185-195 range usually 4-6* apart. The only time I can get the system to Puke is going up the mountains close to my house runythw boost around 20psi for a period of time or to hit 35+ lbs of boost. Any one have an idea or input of what my problem could be?