Ok first I have replaced the water pump, stat, and heater core. I topped off the heater core when installed / reinstalled, stat opens and closes as the upper hose get warm to hot then back. I am in the process of burping the system after replacing the stat but every time i turn off motor fluid gushes out of the rad like a geyser. I don't know what else to do at this point. Any suggestions would be nice. Yes I have searched