Grinding brakes Options

[Mattattack]

So I've been hearing some metal on metal grinding while braking AND while in motion, I figured it was brake pads grinding into the rotors so I put some new rotors and pads on. While the old rotors were warped, even after i put the new ones on the sound is still there if not worse after spinning the wheel while the car was on jacks. could a wheel bearing or caliper be the culprit? Any knowledge would be greatly appreciated.

[Mattattack]

The sound isn't that noticeable when in motion but it's still there, when I brake it's loud enough for me to notice even with my windows rolled up. I feel like the best way to describe it would be the sound two metal knives would make rubbing together, a metallic scraping of sorts, haha

[Langing]

The sound isn't that noticeable when in motion but it's still there, when I brake it's loud enough for me to notice even with my windows rolled up. I feel like the best way to describe it would be the sound two metal knives would make rubbing together, a metallic scraping of sorts, haha

There is a little metal spring-like thingy built into most of today's pad pairs (one per pair) that's used as a mechanical indicator to tell you when it is time to replace your pads. It's sound is so high-pitched, like a 'squeal.' that I cannot hear it, nor can my brother (BTW: we are NOT Click and Clack ). We both depend on our wives to tell us when they start hearing that squealing sound of the metal thingy scraping around a small width of the rotor. I don't think this is your problem because you said you changed the pads.

Let me ask, however, did you change the rotors and pads on all four wheels, or just the one you think is causing the sound? There are certain sounds in a car that confuse the listener so much they may think it is coming from the rear when it is actually coming from the front, and vice-versa.

When you said you could hear the sound when the car was on jack stands and you rotated the tire, I assumed you heard that sound coming from the wheel you mentioned, but wanted to be certain I was not assuming too much.

Another thing that can go wrong with disc brakes is the 'slider pins' (two bolts without threads that are greased and slide in holes in the caliper mounting bracket) set to permit the caliper to move (slide) on them in such a way that the caliper can grab both pads at roughly the same time with the same force. These 'slider pins' sometimes seize in their holes so the caliper cannot slide. I know this can lead to uneven wear on the two pads. I don't know whether it causes a metallic sound though.

Also, disc brakes are notorious for causing various kinds of noises, so when you change out rotors and pads, you have to make sure you have a good set of shims and mounting bracket pads, and that all of that is suitably greased with caliper grease to dampen "expected" brake noise. Sorry, but I don't know how those sounds sound, so can't be of much help there, except for making you aware of the problem.

You might have to go through the entire process of elimination!

Have you had time to check the dust deflector yet?