HIGH-pitch squeal, front rotor, 1/3 pedal pressure only, dealer SUCKS...HELP

[DZeckhausen]

Originally Posted by Hon68

This has nothing to go with the pads or rotters them selves. Its the vibration caused between the back of the pad and the mettle plate on the brake calipairs when you step on them. It can be an easy fix i did it when i painted my calipars. when u take off your calipairs you can see where they touch the pads just go by some squeek be gone or any of that stuff and apply where they touch let it dry then put the calipars back on. its dosent always fix the squeek, but it should.

There are several different ways to address squeaking brakes, including the use of anti-squeal compound (rubbery goo) on the pad backing plate or a lubricant, such as Permatex anti-seize, on the touch-points between the backing plate and caliper. The goo serves to damp out high frequency vibrations. And the lubricant makes it so that even if the pad vibrates, the rubbing surfaces are less likely to create noise. However, these address the symptom and not the root cause.

By bedding the brakes properly, you reduce the tendency of the pads to want to vibrate in the first place. That's why I don't use any goo or lubricant on the back of my pads. If one of my cars starts to develop squeaky brakes, I take it out and do an aggressive bedding session. That always works for me. On the other hand, there's nothing wrong with taking a "belt and suspenders" approach and applying goo and bedding the brakes.

On caveat: certain brake pad compounds tend to be squeaky by their very nature (e.g. Hawk HP Plus) and there's very little you can do to make them quiet, other than switch to a different make and/or model of brake pad.

[BIG SMOOTH]

Originally Posted by DZeckhausen

There are several different ways to address squeaking brakes, including the use of anti-squeal compound (rubbery goo) on the pad backing plate or a lubricant, such as Permatex anti-seize, on the touch-points between the backing plate and caliper. The goo serves to damp out high frequency vibrations. And the lubricant makes it so that even if the pad vibrates, the rubbing surfaces are less likely to create noise. However, these address the symptom and not the root cause.

By bedding the brakes properly, you reduce the tendency of the pads to want to vibrate in the first place. That's why I don't use any goo or lubricant on the back of my pads. If one of my cars starts to develop squeaky brakes, I take it out and do an aggressive bedding session. That always works for me. On the other hand, there's nothing wrong with taking a "belt and suspenders" approach and applying goo and bedding the brakes.

On caveat: certain brake pad compounds tend to be squeaky by their very nature (e.g. Hawk HP Plus) and there's very little you can do to make them quiet, other than switch to a different make and/or model of brake pad.

Dave, I've bed my brakes properly per your instructions a few times over the last year and it is not helping with the high pitched squeal with light brake pedal pressure slowing down to a stop. I gotta be thinking that I need to redo or put more anti-squeal stuff on the backing plates because it's the only thing I can think of that may be causing my squeal. It's annoying the hell outta me so for me do think this would help get rid of it? My rotors are fine, my posi quiets are fine but the squeal is killing me!

[Cibalo]

I've had the same problem and bedding the breaks seems to only work for a few days. It is only one wheel too, front passenger. I've taken it in to have it checked out and have been told that nothing is wrong. Right now I'm just saving up for some slotted rotors and posi quite pads and hope that will fix things.

[rdmac]

I did the second bedding and they were ok for a few days and than the squeal came back but was a little better. I talked again to the guy who put the new front rotors on (after which all this noise started) and this time he was more agreeable. He said bring the car in. He took the breaks apart, did some slight rubbing on the pads with high grit emory or something like that, cleaned things off, applied some crap, and now three days later things are still very quiet and breaking fine. The bedding usually solved things for a day or two, at least with me. Things seem fine now and he didn't charge me anything. This guy is a semi freind and has done work for me and my daughter many times. Time will tell but I feel optimistic. Did not want to start replacing things when they were not really needed mechanically.

[rdmac]

2 weeks later and things still quiet. Very very faint squeel once in a blue moon. Funny thing is now that I am tuned in to this its amazing how many brakes squeel. Pull up to a busy stop light with your windows down and you can hear squeeling all over the place. Nice cars, ok cars, junkers, trucks, SUVs, anybody.

[DZeckhausen]

Originally Posted by rdmac

2 weeks later and things still quiet. Very very faint squeel once in a blue moon. Funny thing is now that I am tuned in to this its amazing how many brakes squeel. Pull up to a busy stop light with your windows down and you can hear squeeling all over the place. Nice cars, ok cars, junkers, trucks, SUVs, anybody.

My wife's 2007 Corvette Z51 has squeaky brakes and now that the weather is nice, we have the roof off most of the time. So the noise is starting to get annoying. Bedding has not coompletely eliminated the noise on this car. I was going to install some Posi Quiet pads to kill the noise for good, but we've started to track the car, so I'll be installing a 4-wheel StopTech big brake kit instead. (As soon as I figure out what wheels to buy!)

I'm glad your brake noise is finally gone.

[forzavalentino]

have you tried a fresh set of pads? maybe current ones contaminated. Any change in brake performance?