WTF with my brakes?

"Highlander-Datsuns are Forever" (jamesbowland)
04/20/2019 at 14:06 • Filed to: None

See the second rotor with about 1/4” of area raised and kinda being swept by the pad? Other rotor for reference. These rotors and pads have about 15,000 easy miles on them too. I can’t think of why the rotor is wearing this way. They are working fine too no funny business while braking.

P os sible issue: A small piece of rust flake fell between the pad and rotor?

DISCUSSION (21)

Demon-Xanth knows how to operate a street. > Highlander-Datsuns are Forever
04/20/2019 at 14:16

Oem vs cheap aftermarket pads ? Rotor replaced with one slightly larger than the other?

66P1800inpieces > Highlander-Datsuns are Forever
04/20/2019 at 14:24

Are they a known brand like Brembo (even their cheap regular aftermarket are ok) or EBC ? Might be that they were cast and cut a bit out of spec with just a bit too much diameter on the rotor hat. Can you measure them against the old ones? I have been using EBC lately, I think their higher end rotors are fully cast and cut in England. Very nice offerings and only a bit more than cheap aftermarket. on par or less than OEM. I had warping issues with OEM rotors (normal use) and haven’t had the same thing on the EBCs.

AMGtech - now with more recalls! > Highlander-Datsuns are Forever
04/20/2019 at 14:38

Wrong size pads or wrong size rotor are the #1 causes of this.

66P1800inpieces > AMGtech - now with more recalls!
04/20/2019 at 14:47

Agree, I think that lip on the outer edge of the rotor is a bit large compared to what should normally be there.

Highlander-Datsuns are Forever > AMGtech - now with more recalls!
04/20/2019 at 15:22

This is all from NAPA.

Highlander-Datsuns are Forever > 66P1800inpieces
04/20/2019 at 15:22

This is all from NAPA, not super cheap, not super expensive.

Highlander-Datsuns are Forever > Demon-Xanth knows how to operate a street.
04/20/2019 at 15:23

If the rotor was too big, the brake caliper wouldn’t fit, it would rub on the rotor.

BrianGriffin thinks “reliable” is just a state of mind > Highlander-Datsuns are Forever
04/20/2019 at 15:23

Did you do the replacing yourself or did a shop do it? I’d venture to guess that maybe one of the parts wasn’t changed or changed with the wrong size. If you did the job, then maybe it’s just a sticky slider or the way the weather hits it.

Highlander-Datsuns are Forever > BrianGriffin thinks “reliable” is just a state of mind
04/20/2019 at 15:25

I did rotors and pads about 2.5 years ago. Everything was sourced from NAPA.

Highlander-Datsuns are Forever > AMGtech - now with more recalls!
04/20/2019 at 15:28

I kinda think that a flake of rust fell off the rotor and jammed between the pad and rotor... it’s a mazda after all.

BrianGriffin thinks “reliable” is just a state of mind > Highlander-Datsuns are Forever
04/20/2019 at 15:38

Then it’s probably just a combination of environmental factors mixed with tolerances of the brake part company. Or an off day at the factory.

Highlander-Datsuns are Forever > BrianGriffin thinks “reliable” is just a state of mind
04/20/2019 at 15:47

I kinda think a large flake of rust fell off and got jam med between the rotor and pad. It makes the most sense.

I like cars: Jim Spanfeller is one ugly motherfucker > Highlander-Datsuns are Forever
04/20/2019 at 15:49

Car's fucked, time to sell

Demon-Xanth knows how to operate a street. > Highlander-Datsuns are Forever
04/20/2019 at 15:51

There needs to be SOME gap. If one used up that tolerance and the other didn't...

Highlander-Datsuns are Forever > Demon-Xanth knows how to operate a street.
04/20/2019 at 15:52

The gap is even comparing drivers side to passenger side. I think a chunk of rust got caught between the rotor and the brake pad.

Highlander-Datsuns are Forever > I like cars: Jim Spanfeller is one ugly motherfucker
04/20/2019 at 15:52

Checks out.

sony1492 > Highlander-Datsuns are Forever
04/20/2019 at 17:11

This is normal, I think it has to do with rust because I’ve never seen it on worn rotors that stay clean

AMGtech - now with more recalls! > Highlander-Datsuns are Forever
04/20/2019 at 19:37

Is the pad contacting that outer 1/4"? Like, is it big enough to contact it? I’m on mobile, so I can’t tell really well, but it looks like it isn’t. If it is then either you’re right, or a rock stuck in there, or there’s a hard spot (metal flake, abnormally large) in the pad itself.

brianbrannon > Highlander-Datsuns are Forever
04/21/2019 at 18:31

Those look like a constant soft brake pedal applied rather than a firm press only when stopping

Highlander-Datsuns are Forever > AMGtech - now with more recalls!
04/22/2019 at 10:45

The pad is contacting the whole rotor, also noticed this morning I’m definitely getting some steering wheel shake. F-ing hell. Guess I’m buying new rotors and pads.

Walsh McPherson > AMGtech - now with more recalls!
04/24/2019 at 13:30

You may want to take another picture and point the camera on the pad itself.