On dual master cylinder equipped vehicles - does any brake fluid from one reservoir merge with the other reservoir at any time in a normally functioning system?
No
Didn’t think so.
So why do guys still advocate bleeding the right rear first, then left rear, then right front then left front.
Just wonderin’.
I’m guessing just a habit from the old single master days?
Mostly habit. ABS? if not, typically the rear line will run to the rear, then split. Same with the fronts, single line out will split at some point. Just trying to get the air out of the longest runs first. Hit all 4 corners, run the pedal a few times, and hit all 4 corners again two or three times to verify. Use clear tubing on the bleeder to see what's coming out.
