Quote:
Originally Posted by TiAgX5
Only a small amount mixes with the fluid in the entry ports of the ABS/DSC valvebody.
There's only a few ounces total volume in the ABS/DSC valvebody but brake fluid is EXTREMELY hygroscopic and readly absorbs ANY moisture (even humity in the air).
Some end up with air in the module by not properly maintaining fluid level during a brake bleeding procedure and introducing air into the valve ports.
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Thanks for your follow up. The DIY covers the importance of not introducing air or other contaminants into the system and keeping the fluid in the reservoir full while doing the flush.
I'm surprised that the fluid doesn't mix after driving around. I will check with my mechanic for his thoughts when I see him tomorrow. We just did a flush on mine a few months ago using the DIY method. He used to be the master BMW mechanic at our local dealer.