Hello, I am trying to determine if a flowing degas bottle is normal when I first start my F150 before the thermostat has a chance to open to circulate coolant. This is on a 2013 F150 coyote 5.0L engine with about 150k miles. I am hoping that this is not an indication of a blown head gasket where combustion pressures are causing air/combustion gasses to enter into my cooling system and cause movement of coolant through the degas bottle. Any input would be greatly appreciated. Thx
Dan..