Two things to look at here: " #1. The factory (OEM) closed system radiator cap should be replaced. When the radiator has been filled t o the top, the plastic reservoir tank should be filled 3/4 full. The special closed system cap allows trapped air and excess coolant in the cooling system to escape back into the overflow tank when the system is under pressure. And only coolant is drawn back into the cooling system under vacuum when the engine cools.
#2. If you're still having trouble have a trusted private mechanic or new car dealership do a *cooling system pressure test to see if there are any external or internal coolant leaks. *Engine compression will leak into the cooling system and blow the coolant into the recovery bottle if there is a head-gasket problem."
#2. If you're still having trouble have a trusted private mechanic or new car dealership do a *cooling system pressure test to see if there are any external or internal coolant leaks. *Engine compression will leak into the cooling system and blow the coolant into the recovery bottle if there is a head-gasket problem."
