lexdiamondz10304
Dedicated LVC Member
My ceramic brake pads are brand new and my rotors look fine.. so why are my brakes still squealing?!?!... Can anybody help me out?? It would help alot, Thanks..
Brakes squealing!!...
- Thread starter lexdiamondz10304
- Start date
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GrayGhost1
Guest
More than likely the pads are glazed over. Also, the last time I replaced my pads I used the disk brake quiet stuff on the backs of the pads. Mine have NEVER squealed. You might want to take one off and look at it. That is if you did the brake job yourself.
Ken
Ken
lexdiamondz10304
Dedicated LVC Member
Glazed over??? How does that work?
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GrayGhost1
Guest
As the pad gets hot and presses against the rotor the pad can "glaze" over or be shiney. It's not a serious problem but it will cause squealing. I noticed this on my previous pads when I took them off. A quick fix would be to take them off and rough the pad up with some sand paper. Then apply the disk brake quiet to the back of the pad. I bet that would take care of your squealing.
lexdiamondz10304
Dedicated LVC Member
Thanks, I will definately try that..
lexdiamondz10304 said:
You did at least have the rotors re-surfaced, right? If you didn't, you will probably get noise for at least a while. The pads have to destroy themselves enough to fit the grooves in the rotors you can't see, but while this is happening, the pads get hot and glazed.
luckieleo
Well-Known LVC Member
lsbit said:
:I
my dad's 95 jeep grand cherokee, i HATE driving it because he didnt have the rotors cut/re-surfaced & they never stopped squealing after he put the new brake pads on. definitely if you can, find out which side the noise is coming from, take one or all rotor(s) into napa or somewhere & have em resurfaced for $10 a pop. if they are way too worn, they will tell you they cant do them & you'll have to buy new ones. mine were too worn & had to buy all new ones! car had abou 65k miles & rotors had never been cut/replaced...
do it soon, or the brake pads WILL get grooves in them to match the ones in the old rotors as lsbit said & you'll be sorry! that noise is REALLY annoying!
good luck!
2k2ls
Well-Known LVC Member
pads glaze over pretty quickly. Id pop the rotors off bring them to napa, take the pads put them back in the box and return them. Ask for another set. Just say you think they may be defects because they wont stop squealing. But if you want to keep the pads at least get the rotors cut and then take the pads and rub them face to face so the surface could rough back up a little bit.
lexdiamondz10304
Dedicated LVC Member
hmm... about how many times can a rotor be cut?... I had them checked, and the brake man said that they might not be able to do them since they are getting kinda thin,..... anyways I took it back to the dealer were I got it from and they are going to replace them... but the car is going to stay in the shop till the 13th.. =(
It all depends on how badly they're scored (as in grooved, not rated) or warped. The deeper the scoring or more severe the warp, the more material has to be removed during the turning process--if something goes wrong, and you get a really deep groove or bad warp, it's entirely possible that an essentially new rotor will be junk. (It's more likely to be caused by a groove than a warp on modern rotors.)lexdiamondz10304 said:
If you ever look on the back side of a rotor (the face that mates to the hub), you'll find a 3-digit number (I think it's marke "min" or something like that). That's the minimum rotor thickness in thousandths of an inch; anything below that, and the rotor is not considered reusable. At least that used to be the case; I haven't looked at the rotors on anything recently--the last ones I've really looked at were on my '95 SHO, when I installed new "better" rotors, but that was in '97 or '98. (My other cars in the interim never gave me reason to pull the rotors.)
As far as resurfacing goes, I've never had my rotors turned (or resurfaced) unless I had warping problems (my '89 T-Bird SC had problems with that). The only time I've ever had squealing problems was when I managed to lose the anti-squeal shim on the driver's side rear brake pad on my '95 SHO. I just installed the new pads and let them seat themselves... :wrench
luckieleo
Well-Known LVC Member
lexdiamondz10304 said:
mine had NEVER been cut before, and when i took them in to be cut, they told me they were too thin to be cut, so i had to buy new ones.
there is no expiration date on the rotors. just depends how often/how much they had been used/worn. they have a tool they use to measure them, and after they get down to a certain thickness, they can no longer be cut.