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Brakes Squeal

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Old Oct 11, 2011 | 03:47 PM
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Default Brakes Squeal

I posted on here awhile back about my car squeaking while going left even the slightest. After a little research I came to the conclusion it has to be my brakes, I needed new rotors and pads anyhow so I got new ones hoping this was the problem.
Alas I still have the problem, my brakes squeal while driving the car and not applying the brakes at all, but only when going to the left even the slightest. I've tried searching, but most solutions for squeaks and squeals is while using the brakes. any ideas?

Thanks
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Old Oct 11, 2011 | 04:11 PM
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Question calipers

Originally Posted by KRM5124
I posted on here awhile back about my car squeaking while going left even the slightest. After a little research I came to the conclusion it has to be my brakes, I needed new rotors and pads anyhow so I got new ones hoping this was the problem.
Alas I still have the problem, my brakes squeal while driving the car and not applying the brakes at all, but only when going to the left even the slightest. I've tried searching, but most solutions for squeaks and squeals is while using the brakes. any ideas?

Thanks
Who did the brake job?
Sounds as though your calipers are binding.
Or,they screwed up the installation of the new rotors.
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Old Oct 11, 2011 | 04:15 PM
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Who did the brake job?
Sounds as though your calipers are binding.
Or,they screwed up the installation of the new rotors.
I put the new rotors on and pads in, but it cant be the new ones because the old ones had the exact same symptoms (the old ones had been replaced by the dealer before I ever bought the car)

as far as my calipers binding, is there a way I can check for this, and if this is the problem any solutions besides new calipers?
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Old Oct 11, 2011 | 05:23 PM
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were the pads on the squeaking side more worn than the other side?
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Old Oct 11, 2011 | 05:37 PM
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Originally Posted by thekinn
were the pads on the squeaking side more worn than the other side?
My girlfriend's Kia was like this.
When we made slight left turns, it would squel.
The dealership said the REAR brakes were worn.
I thought it was weird because most cars have their fronts wear out before the rears.
I do remember the dealership saying that one of the brake pads was almost completely worn.
We put on new pads for the rear.
The car still slightly squeels.

I have a feeling OP and my girlfriend have the same problem.
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Old Oct 12, 2011 | 07:14 AM
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were the pads on the squeaking side more worn than the other side?
no they are the same, I measured just to make sure

The dealership said the REAR brakes were worn.
I'll check the rears, but it sure sounds like the front is where the noise is coming from, but I'll check tonight anyway

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Old Oct 13, 2011 | 06:56 PM
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Figure I'll update this for anyone who has this same problem.

So one of my caliper piston rods (the ones the bolts go in) had dirt build up in it, and this was causing the caliper to be uneven. My guess is when the dealership did the last rotor/pad job, before I owned the car, the dirt got in there and they didn't clean it out.

I used a brush to get everything out of there, cleaned off the rod, and put new grease in.

No more squeal, and car stops better
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Old Oct 13, 2011 | 10:45 PM
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How much play do you have in your wheel bearings? Removing the dirt from the caliper bolt allowed the caliper to float like it's supposed to, but the caliper shouldn't need to move when you turn the steering wheel.
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Old Oct 14, 2011 | 10:13 AM
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Originally Posted by Czarrr
I thought it was weird because most cars have their fronts wear out before the rears.
I did brakes for years and it was always my experience that the opposite was true. Front brakes are larger to account for the mass above them (i.e., engine). However, rear brakes work harder (think of a bicycle; you use the rears harder than the fronts. This allows for better control of the bike. Same goes with cars). I've seen a car with factory brakes that had 90% remaining on the fronts and only 10% remaining on the rears (it was PT Cruiser, for what it's worth).

Last edited by zakmartin; Oct 14, 2011 at 10:15 AM.
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Old Oct 14, 2011 | 10:32 AM
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May sound stupid...but I've seen other cars(not heard of this on a Z)have a "squeal"
problem in the front due to the inner alluminum shield being bent or loose..just hitting the rotor causing a squeal.May want to check this out.
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Old Oct 14, 2011 | 11:45 AM
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May sound stupid...but I've seen other cars(not heard of this on a Z)have a "squeal"
problem in the front due to the inner alluminum shield being bent or loose..just hitting the rotor causing a squeal.May want to check this out.
I had already checked that, wasn't the problem.

but the caliper shouldn't need to move when you turn the steering wheel.
It wasn't that the caliper was moving, it was the way it was set because of the rod, the very slight angle was causing pressure more on part of the pad than the other.

I drove around last night about 30 miles, and this morning about another 25.
Still no squeal at all, and both rotors are normal temps, neither is extremely hot, brakes are working fine, actually much better than before. So I'm happy with the outcome. I just updated this so that if anyone has a similar problem, they will have one more item to check.
I noticed while searching for solutions for "car squeals" about a thousand things can be the problem
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Old Oct 14, 2011 | 01:16 PM
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I understand how you freed up the caliper. That's good, because the pads will wear unevenly if the caliper can't move.

I was concerned that with the caliper bound up on the rod, the rotor was rubbing the pad when the load on the wheel bearing changed as you were turning. If the wheel bearing had enough play to allow the rotor to touch the pad and squeal when you turn, it needs to be replaced. It doesn't squeal now that you've freed up the caliper, but the wheel bearing is still too loose.
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