Another brake bleed/MC/Booster problem thread

[infernosg]

Originally Posted by Pete_89T2

That is odd, although the right rear line is always the most difficult to bleed, since it's the longest line length. Only other thing I can think of is maybe the bleeder screw threads have worn out, or perhaps the new MC is defective? Sloppy bleeder threads would allow air to sneak in and would show up in the bleeder tube while you're bleeding it, but since it's a pressure bleeder, I don't think that air could get pulled into the system from that point or effect pedal feel.

You're telling me. I've never had this much difficulty bleeding brakes and I've probably done them 100 times on this car. I have no external leaks whatsoever. I suppose the MC could be bad but when I bled it I could push the piston in <1/16" using all my strength. I guess I'll pull it off again tomorrow to see if anything is leaking internally. Beyond that I'm out of ideas.

The top bleed screw is the correct one to use for the rear calipers, right?