Originally Posted by TBatt

Yes, that is what a gravity bleed is. How long it takes varies with how old the fluid is. Gravity bleeding is usually not quick but it does work. Make sure that you monitor the reservoir and don't let it run out. It doesn't hold very much fluid so it will need watching.

I myself, use a vacuum bleeder. It works and has been working for the past 15 years. https://www.griotsgarage.com/product...fType=&from=fn

This tool can be used for lots of car work.