camaro1992

In June I bought new brakes for my Camaro. I got ceramic brakes and they was suppose to turn the rotors. Couple of weeks later the brakes started squealing and they will not stop, and now my rear drums sometimes makes grinding noises. I've been told to take the brakes off and put some of that stuff on the backs of them. Is that a good idea? Any suggestions.

FreeLoader

for future reference, it's something like 30-50 bucks for a set of rotors for that car, it's practically cheaper to buy new ones then have them turned.

I've no clue what you're talking about as to "stuff" that you put on the backs of them, you'd have to clarify. I can't really see how applying anything to the back of the pad would stop the squealing either.

did you do it yourself? did you pay someone else to?

you may have a stuck piston in one or both of your caliper's, pushing the pads against the rotors even when you're driving. it's unlikely if you have new pads, but remotely possible.

your wheel bearings(if they haven't been replaced or regreased in some time) can make a different kind of whining sound, could that be it?

there is of course, always the possibility that they never touched your brakes if you took it somewhere.

as for the drums...I'd need more information first.

JamesC

iTrader: (5)

There is a product. Check with your auto parts store. IIRC, it's called anti-squeel or anti-squeak (or something like that).

JamesC

FreeLoader

ohhh, I think i know what you're talking about, though i've never used it.

still, wouldn't it make more sense to put it on the front of the pads?

ghettocruiser

iTrader: (4)

NOOOOO!!!! You NEVER put anything on the front of your pads unless you want to take it for a ride and run into the back of someone. The other stuff you said about bearings and all that is valid however. But with a sqeal that only happens during braking, I would assume its not bearing related.

What was said above about getting new rotors vs. cutting them is right. New rotors are so cheap, its not worth having them cut. Proper install is key for a quiet brake set up. You should use sil-glyde which you can get in little packets at autozone on all the metal to metal contact surfaces. I use a combination of that and antiseize when I do brake jobs. Put it on the slide for the calipers, the pins, bolts, BACKS of the pads, etc.

Any where you have metal to metal that isnt lubed can squeak. When you put on the brakes, things just dont move, then stay put. There are harmonics and vibrations that happen even though you dont feel them in the car. These little vibes cause sqeaking, then the spindle and other brake parts sort of act like a speaker and make it louder.

As for pad to rotor sqeaking...that usually happens when you have a dirty rotor and get something on the pads during install. Also, when you put new parts on like that, you should bed the brakes. It will help them peform the best and last longest. Autozone brake cleaner, the valucraft stuff, is the best Ive used and its really cheap. Just spray everything down when you are installing the rotor to get it clean.

As for your rear drums, the grinding noise is either shoes that are worn down, or something floating around in the drum that keeps getting caught when you hit your brakes. You need to pull the drums and have a look inside, because if there is infact something foreign in there, you will score your drums and ruin your shoes prematurely. Also a great time to inspect your springs and adjusting parts...make sure none of that came loose and is grinding around in there.


Justin

bilms01

There is stuff to put on the face of the pads to cut glazing and help the pads seat better. I think I still have some and can post the name tonight if anyone wants it. I have used it several times without and have never run into anyone, but the pads seated much faster and easier. An occasional brake squeal is perfectly normal, There is not a car on the road that doesn't make brake noise of some kind or another. The goal is the change the frequency out of the human hearing range. (That's why dogs chase cars they hear the squealing from the pads and rotors)

You can either use the disc brake silencer which goes on the back of the pads and basically glues the pads to the caliper, or get disc brake pad shims, they are just 2 thin metal plates with an insulator inside normally made pad specific.

Sounds like you pads are heavily glazed, which accounts for the noise and lack of brake action. Take the pads off and lightly sand the face and bevel the leading and trailing edge of the pads. If you had the rotors turned they probably did not swirl grind the braking surface.


http://www.castleproductsonline.com/brake_silencer.html

ghettocruiser

iTrader: (4)

Dont have any direct experience with that product. And I certainly dont want to tell you it doesnt work, since you've used it and I havent.

However, Ive done plenty of brake jobs without it...and have never had what I would consider squeaky brakes. You are correct that all cars will have squeaks now and again. But it shouldnt sound like a school bus coming to a stop either.

Also, there are a couple different products to put on the backs of pads. The stuff that basically bonds the pads to the calipers is usually orange, and resembles elmers glue. I dont like that stuff... The stuff I use lubricates the parts and sticks sicne its silicone based. Its called syl-glide or sil-glyde or something like that. I get it in a plastic jar, like anti-seize with the brush in the lid.

A lot of folks dont have a bed in procedure either. That produce aids in proper bedding...but if you dont bed the brakes in the first place, I wouldnt expect it to work any miricles. I actually never knew how to bed brakes until recently, and it makes such a difference.

I have done what bilms01 suggested with some sand paper. I used a block of wood and scuffed the pads, and lightly scuffed the rotors. That was before I learned how to bed the pads, and would glaze the new stuff...

Justin

M1tch

My front disc brake has been squeeling as i'm driving. This just started happeneing a few days ago. It seems to stop once i hit the brakes though and it starts right back up again. Is it the rotor or brake pad?

campin1983

iTrader: (4)

Check the warner on the brake pad, its probably hitting and time to replace the pad. Also, if you drive on a lot of gravel roads, sometimes a nice piece of gravel will get stuck between the pad and the rotor, making a similar sound.