rear brake pad wear pattern

[andrew600]

brand new hawk pads and rotors. been on for about 1500 miles. the inner area of the rotor where the pad is supposed to contact on the rotor has surface rust on it. i let it go just not really thinking about it, but i knew that the pad was not contacting that part because if it were there wouldnt be rust on it.

i checked them today and it looks like the pad is wearing in a lopsided pattern. the rusty area of the pad has more pad than the top.

i tried searching but found nothing. can anyone help me out?

[andrew600]

bump i need to find an a resolve for this. searching has found me nothing.

[Brok3n_RB25]

Could be your slide pins (cheap fix from your local parts store) or it could be your caliper piston. Was going to say rotor, but I just re-read that you have new rotors on.

[andrew600]

slide pins? i wasnt aware i needed to replace them. they are in there just as they were when i removed them. i was thinking piston as well. but on both sides?
didnt make sense.

[Brok3n_RB25]

How does the pad wear pattern on the rotor look? Is it covering the surface of the rotor, or is it only covering part of it?

[andrew600]

ill have to snap a pic after work. but its only covering the top an middle of where the rotor should get used. it does not cover the lower surface area of the rotor. and it should be used for sure.

[Brok3n_RB25]

Just the outside pad is doing it? Is it all 4 corners as well?

[andrew600]

the inside of the pad closest to the lugs. and no just the back two.

[az_240]

Maybe try a different caliper grease... How dry do the calipers look where you greased them last? I've had good results with the CRC synthetic black stuff from Checkers.... much better than the cheap packets most auto stores hand out. (although I just rebuilt my calipers using the permatex ceramic purple stuff thinking it might be better somehow)

Might want to check that the pistons aren't stuck either

[Brok3n_RB25]

Yep. Exactly what I was thinking. Check and see if the piston is dry. That could have led to it sticking. Mine seized, or so I thought, at one point. I took the little square tool (from your local parts store again) for turning the caliper in and just ran the caliper out a bit and back in. It smoothed out the travel and I haven't had a problem since.

[Firestorm]

even if your slide pins would be seized, the inner brake pad would still make contact with the disc, since the piston pushes the inner pad to the disc. seized slide pins usually only affect the outer pad, at least from my experience.

[andrew600]

firestorm. you sir make logical sense. ill look after all sugestions and report back. it started raining to bad to take pictures. but i will do it today

[cdlong]

Mine did the same thing a long time ago. I removed the shims that go between the caliper bracket and the pad, cleaned everything up really well, and that fixed it. Also, check that the bump on the pad is lined up with the dent on the piston.