A while ago I posted asking for advice on my 123's soft brakes. I did
everything from changing the master cylinder three times to bleeding
the brakes every different way possible. I blew out a front caliper
recently on that car. I removed the bad caliper, installed the rebuild
kit, then reinstalled it. Suddenly the brakes are working perfectly.
I'm guessing the bad piston seal in the caliper was sucking air in so
no matter how many times I bled the brakes, it was sucking atmosphere.
When the seal got bad enough to bleed fluid, I replaced it and the
problem was solved. And no, the bubble probably wasn't in the line
since I never bled the brakes after I reinstalled the caliper. Just
pumped then a couple times, then all was well. thanks for all the
feedback when I posted the problem.