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Old 03-15-2019, 10:07 AM
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crystalworks crystalworks is offline
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Originally Posted by andrewwynn View Post
I'm pretty sure the coolant res is in the active loop and already pressurized. Not sure how you would vent into a pressure zone. That said I never saw an overflow tube either
BMW used to use a cold fill line and hot fill line. You would fill to cold and then when the system pressurized it would raise to the hot line. They had a vent nipple with a hose venting to atmosphere above the hot line in the event of an over fill or an over pressure event. I never had any appreciation for it until they did away with it.
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