Lots of variables
Did they just put the pads on old friction surface (not resurface rotor faces).. normal friction sounds or pads worn out that wear sensor drags, does noise stop if you touch brake pedal ?
Pads stuck in mounts and drag to premature wear out, sensors drag and make noise..
Excessive rust and pad friction as working
Need a visual inspect as to condition of pad material thickness, rotor face condition,,, squeels are kinda trivail, unless it stops with pedal application,,,,, grind/hashing is of more concern.
Got pictures ?
why did you even ask if the squealing stop if I touch the brake pedal?, If you read my response, of course the noise didn't stop. I said in the post that it squeals when I brake, and so therefore it doesn't stop if I touch the brake, it only squeals when I brake.Lots of variables
Did they just put the pads on old friction surface (not resurface rotor faces).. normal friction sounds or pads worn out that wear sensor drags, does noise stop if you touch brake pedal ?
Pads stuck in mounts and drag to premature wear out, sensors drag and make noise..
Excessive rust and pad friction as working
Need a visual inspect as to condition of pad material thickness, rotor face condition,,, squeels are kinda trivail, unless it stops with pedal application,,,,, grind/hashing is of more concern.
Got pictures ?
Did you purchase pads or shoes? Is the noise coming from the front or rear. This problem is more common with drum brakes.
Disk brakes usually have a small amount of contact between the pads & rotors even when there's no pressure on the brake pedal, this light contact can cause a squeal (or squeak if the rotor isn't perfectly symmetrical in alignment and thickness). When you press the pedal momentarily, that pressure change on the pad/rotor assembly can be enough to momentarily stop the squeal or squeak. That's the reason for that type of question.
Another condition can cause the squeak/ squeal when you step on the brake pedal - I'm assuming this is what you have.
Not knowing what your mechanic saw and how he "repaired" the brakes on your car makes it hard to give you a definitive diagnosis on what your current problem is, but here are some things I'd look for:
- Physical condition of the rotor - is it grooved, straight, etc.?
- Was the glaze removed? The old pads would have left a layer of glaze on your rotors that could cause this noise if the glaze wasn't removed.
- What brand & quality of parts were used? Some pads are notorious for causing a squeal even though there's nothing physically wrong with the installation or any components.
- Were all the moving parts of the caliper properly lubricated. Some calipers (like Hyundai's) are notorious for seizing partially causing asymmetrical brake clamping - this can cause a squeal because there is no clamping but only a push by the "piston pad" on one side of the rotor.
