Brake issue

Any ideas why is this happening?

 

Brake pad pieces broke off?

 

No, it's complete.

 

What are we looking at? The worn in lip at the bottom of the pad swipe on the rotor?

Could be a broken bit off the pad. I'd guess uneven pressure on the pad though, sticking caliper piston maybe?

 

How are the caliper pins?
Are they pads free to slide on the pins?
Maybe they are causing the pads to stick.
The pins are up top, so maybe that is it?

Just a guess?

When I say stick, I mean stick OPEN.

 

^this most likely. Pull the pins, sand smooth with sand paper. No more than 100 grit. Preferably wet and dry sandpaper. Get smooth, apply grease/lube, put them back in.and go from there.

 

Check what area the pads make contact with, I've seen aftermarket pads that don't cover as much area as OEM pads.

 

Will check in the morning. Thanks to all.

 

X2

 

Beyond basic caliper maintenance.

I would suspect wheel bearing play.

Are the pads and rotors oem?

 

Are the pads same thickness or they angled

 

I suppose taking a look at the backside would help further diagnose this?
If it’s a bearing issue, would the back side be the opposite wear pattern as the front?
A bearing never crossed my mind? Good catch.

Good call on the OEM parts.
Wouldn’t surprise me if aftermarket were rotor weren’t milled flat.

I guess doing this for a living helps, huh?
Some of this stuff, is at home DIYer’s don’t see enough to think about it.

 

I don't judge, I just share my experiences. Typically I'll see weird outer edge wear like that if the rotor is cocking under turns due to bearing play.

Cheap rotors will do this, but these don't look like they are no-name parts.

 

No problem.


Sometimes it takes guys like you that do this on a daily basis to help out.
Us Driveway DIY guys don’t see enough of this stuff to “think past the obvious”