dragpro

Hey guys, part 2 of my A4 B5 issues.

I recently purchased this car, had some issues I've worked through this is the next issue I need to tackle.

I recently replaced the pads and rotors all the way around, I semi-rebuilt the rear calipers, just rubber bushings on the slides and the pistons. The calipers move in and out fine.

Anyway the problem is, now with the new setup, I am noticing that the only part on the rotor that seems to be grabbing / wearing is about 1-2" from on the outer edge. Its not grabbing the complete footprint of the pad.

Any ideas of what can be happening? I bleed the brake system, then I flushed the brake fluid and replaced with new DOT 4. Problem still persists. The brakes grab great and the pedal feel is good, but its not wearing as it should.

Thoughts?

turbo510

Your message is confusing; Is it wearing only at the outer edge (your post title) or 1-2" from the outer edge (third sentance)? Which brake rotors are like this, and are both inside and outside surfaces doing this? And finally, as you drive the car, do the pads gradually contact more?

dragpro

They are only wearing on the outer 1-2 inch edge of the rotor. So if the rotor has a 4" face surface, only 2 inches of the surface from the outside diameter is being worn. I can tell because when I installed the rotors, it rained that night causing a surface rust. I drove them the next day and noticed that the pad was only "contacting" or "wearing" that 1-2" outer surface of the rotor, the 2inches from the inside diameter still have that surface rust on them.

All four rotor have the same scenario. Hope that clarified things. If not let me know and I'll do my best to explain.

turbo510

The only thing I can think of is the new pad's surfaces are not exactly parallel to the backing plates. I would expect that this is a non-issue, and the pads will eventually wear evenly.