Hey guys just installed a new radiator , I filled the coolant tank and radiator with coolant up to the cap , left the cap off and started the car while running the heater on full blast. Well the car started burping some coolant out and everything was normal about 2 min later all the coolant started gushing out of the radiator where the cap is , it basically threw out most of the coolant that was in there why did this happen ? I thought it was just supposed to burp a small amount but it made all the coolant come out ?