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New Brakes, Squeaking/Grinding Coming From Left Rear

C

ChaCha

New member
I just put new brakes,calipers, and rotors on my 97 GTP. Bought the entire front and rear brakes kits from Powerstop off of CarID. I did the front ones last week and have had no problem with them. Went on easy and no noises. I just did the rear yesterday and as soon as I pulled out the driveway, I heard what sounds like a metal clip grinding against the rotor. I investigated and this does not seem to be the case. This is my first time doing calipers, rotors, and brakes. The only thing that appears to be in contact with the rotor is the brake pad.

Any idea what I should be looking for? I want to try to fix it tomorrow, otherwise I'm bringing it to a shop on my next day off.
 
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Re: New Brakes, Squeaking/Grinding Coming From Right Rear

did you clean and re grease the slider pins that hold the caliper to the bracket? that can cause it.

or you somehow bent the dust shield and its rubbing the rotor, it happens.

and lastly, the new rotors. the e brake pads may need to be backed off a bit, aka over adjusted for the new rotors and dragging.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

I did not do one or three. As for your second possible diagnosis, I checked both sides on the rear and the metal clips that hold the brakes in place (I'm assuming this is the dust shield) are not touching the rotor.

I also noticed it only does it once per rotation. I haven't noticed any scratching of the rotor, so I'm almost positive the metal clips are not touching.

Any other advice before I try to fix it after work tomorrow would be greatly appreciated.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

the once a revolution makes me think e brake dragging. you'll just have to take it all apart and lube up the pins, then back off the e brake star wheel.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

take your wheel off and spin spin spin spin spin, you WILL find your problem.
 


Re: New Brakes, Squeaking/Grinding Coming From Right Rear

thats for full drum brakes. not a rotor with a drum e brake.

take your wheel off. take the caliper off, push the rotor on flat, or use a backward lug to nut to hold the rotor snug, then spin it, if you feel or hear the dragging its either hitting the shield on the back where you cant see, or its the brake. take the rotor off and look for a rub mark on the shield. if you see one, pound that spot out. put the rotor back on see if its gone.

no marks to see, then turn the star wheel in the drum brake, one way spreads the pads, the other will close them. put the rotor back spin it to see if its gone or not.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

Alright Scotty, I will try that tomorrow and post results. Hopefully all goes well.

ITHURTZ, I tried that earlier today and was not able to find the problem. Just get more details about it. That's why I came to you guys.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

you can spin the disk real fast and its silent? anything hitting rim? spin with tire on. or your looking at the wrong wheel
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

As I said earlier, didn't see anything hitting the rotor. Definitely didn't see it hitting the rim. I wasn't able to spin it fast, nor was it silent. It was only once per revolution, as I said. Couldn't see anything but the pads touching the rotor. I checked both sides. The right rear makes no noise at all.
 
Re: New Brakes, Squeaking/Grinding Coming From Right Rear

So, I did as you said Scotty and the sound is still there. Lubed up the slider pins, double checked the dust shield was not touching, and rotated the star wheel to compress the e-brake and still the same sound.

Any ideas from here?
 


did you spin the rotor when it was the only thing on there?

if it sounds like metal on metal in that one spot if the rotor was hitting the plate on the back you should have seen a clean shinny area where the contact is being made.

unless the brake pads are dragging. did the piston go back in easy when you compressed it to get the new pads in?
 
Scottydoggs said:
did you spin the rotor when it was the only thing on there?

if it sounds like metal on metal in that one spot if the rotor was hitting the plate on the back you should have seen a clean shinny area where the contact is being made.

unless the brake pads are dragging. did the piston go back in easy when you compressed it to get the new pads in?
Click to expand...

Yes, did the adjustment as you suggested and then put just the rotor back on, spun it, and it didn't sound like it does once I put the caliper on and spin it.

As for the compression, one caliper, which went on easy, was compressed out the box. As for the other one, the one I'm having problems with, I had to squeeze it by hand to compress it enough to ensure my brake pads would fit around the rotor.

I talked to a friend who is going to auto mechanic school and he said it sounded like e-brake or brakes dragging. Told me I should wait a few days and see how it is, but it's annoying me.
 
Yah my fbody brakes did that once. It would squeal until you used the brakes. Turned around, took em off. Filed down the new retaining clip and good to go. should have kept the old ones.
 


i was gonna say then theres the drive it and let wear on what ever is rubbing till it stops. if it goes on for more then a few days, id start looking again.
 
Well, I put them on Friday and have only put about 60 miles on them by going to work and coming home. How much longer should I wait, either time or mileage wise?
 
let it go a few more days. i know it sounds bad, no one wants to hear that crap.

lets see if we can narrow it down more. do you hear it when you brakes are on? or only off the brakes?

if its gone when on the brakes its the caliper or pads, still there brakes on, its a rotor rubbing something still.
 
It only occurs when I am driving or braking very very slightly,To the point that I'm barely slowing down at all. But once I apply them enough to slow me down, I don't hear anything.
 
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