I've been struggling with air in my front driver side brake line/disk brake caliper. For the past several weeks I have been gravity bleeding it and the air would escape and the brakes would work then after a few days I'd have to bleed only the driver side front again cause there is more air in it, this would continue. There is no air in any of the other lines. The master cylinder is new, not rebuilt, the front rubber lines are new and calipers are new rebuilds. Anybody have any suggestions on what it could be? Also is the prop. valve on 1969 chevelles necessary and could the distribution block be the problem. I tried to take pictures but had problems posting, so I'll see if I can figure it out but hopefully someone here still knows what I'm talking about.
Thanks
Mike

Had the same problem with a rear wheel cylinder(new).Found when the brake shoes returned the seal would let air in and when the brake was pressed the fluid pressure would cause the seal to seal the air in.Like a one way valve,sounds like the same problem with your caliper - MIKE

Thanks, I'll take the caliper off and take it down to the parts store and get an exchange, I love lifetime warrantees. :D I was running out of ideas fast.
Thanks
Mike