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Old 07-31-2014, 10:23 AM   #1
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Brakes won't stop squealing

My front stock pads (brembo brake package) were squealing like crazy anytime light pressure was applied or I'd hit a bump while braking or any number of things, so I decided to get some Duralast Cmax from Auto Zone. Squeal went away for like five minutes. No brake dust which is awesome, but they would still squeal even though they aren't supposed to.

I then tried some anti-squeal on the back of the pads. Didn't help at all. In fact, I now have a rotational squeal on the front left wheel. I tried breaking them in a few times. The squeal goes away when they get hot during the break-in but comes back as soon as they cool off.

Does anyone have an idea? It's driving me freakin' nuts

Symptom bullet points:

-rotational squeal on front left
-front left and right squeal when any kind of light braking is done
-squeal when I hit a bump while braking (any amount of pressure)
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Old 07-31-2014, 10:38 AM   #2
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Quote:
Originally Posted by KARgt13 View Post
My front stock pads (brembo brake package) were squealing like crazy anytime light pressure was applied or I'd hit a bump while braking or any number of things, so I decided to get some Duralast Cmax from Auto Zone. Squeal went away for like five minutes. No brake dust which is awesome, but they would still squeal even though they aren't supposed to.



I then tried some anti-squeal on the back of the pads. Didn't help at all. In fact, I now have a rotational squeal on the front left wheel. I tried breaking them in a few times. The squeal goes away when they get hot during the break-in but comes back as soon as they cool off.



Does anyone have an idea? It's driving me freakin' nuts



Symptom bullet points:



-rotational squeal on front left

-front left and right squeal when any kind of light braking is done

-squeal when I hit a bump while braking (any amount of pressure)

Are those still the same rotors? I put some new rotors and pads on a different car a couple years ago and noticed squealing when I swerved back and forth. Took the pads off and did everything all over again. It still happened. It looked like the corner edges of the rotors were hitting the caliper mounting bracket. Luckily I still had the original rotors. I put them back on and the noise went away.


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Old 07-31-2014, 10:44 AM   #3
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Are those still the same rotors? I put some new rotors and pads on a different car a couple years ago and noticed squealing when I swerved back and forth. Took the pads off and did everything all over again. It still happened. It looked like the corner edges of the rotors were hitting the caliper mounting bracket. Luckily I still had the original rotors. I put them back on and the noise went away.


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Original rotors are still on.
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Old 07-31-2014, 10:47 AM   #4
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Original rotors are still on.

Did you have the rotors turned, or at least hit them with some sand paper? Are they all glazed up?


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Old 07-31-2014, 10:48 AM   #5
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my Brembo car has done this since almost new, **** drives me crazy!!!!!!
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Old 07-31-2014, 10:49 AM   #6
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I hit them with sandpaper yesterday. Same problem. I don't think they are glazed but at this point all I can think of is that the rotors might need to be resurfaced.
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Old 07-31-2014, 11:03 AM   #7
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I hit them with sandpaper yesterday. Same problem. I don't think they are glazed but at this point all I can think of is that the rotors might need to be resurfaced.

That would probably be my next step.


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Old 07-31-2014, 11:36 AM   #8
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My next step would be filing the sharp corners off the brake pads a touch....
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Old 07-31-2014, 11:59 AM   #9
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My next step would be filing the sharp corners off the brake pads a touch....

Good idea! I have done that with pads also. Take a metal file and file the edges to an angle. Some new pads come that way already, and for the reason of quieting them down. Forgot all about that.


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Old 07-31-2014, 02:32 PM   #10
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Quote:
Originally Posted by KARgt13 View Post
My front stock pads (brembo brake package) were squealing like crazy anytime light pressure was applied or I'd hit a bump while braking or any number of things, so I decided to get some Duralast Cmax from Auto Zone. Squeal went away for like five minutes. No brake dust which is awesome, but they would still squeal even though they aren't supposed to.

I then tried some anti-squeal on the back of the pads. Didn't help at all. In fact, I now have a rotational squeal on the front left wheel. I tried breaking them in a few times. The squeal goes away when they get hot during the break-in but comes back as soon as they cool off.

Does anyone have an idea? It's driving me freakin' nuts

Symptom bullet points:

-rotational squeal on front left
-front left and right squeal when any kind of light braking is done
-squeal when I hit a bump while braking (any amount of pressure)
Brembos always squeak when they are cold. They are designed to operate at a much hotter temperature than normal floaters and that's why they stop squeaking when you "break them in", which I assume you mean hitting the brakes causing them to warm up. Of course once they cool off they will start squeaking again. There is no brake dust because Brembo's have brake dust guards built into the calipers.

Brembo's are designed for track use. They are not needed for street use. If you do not track your car you wasted money in getting the brembo package (although hey they do look good). You should know what you're buying before you buy it. Stop using anti-squeak garbage that's probably decreasing your braking performance until it wears off and get used to it because it's not going to go away.
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Old 07-31-2014, 03:52 PM   #11
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Brembos always squeak when they are cold. They are designed to operate at a much hotter temperature than normal floaters and that's why they stop squeaking when you "break them in", which I assume you mean hitting the brakes causing them to warm up. Of course once they cool off they will start squeaking again. There is no brake dust because Brembo's have brake dust guards built into the calipers.

Brembo's are designed for track use. They are not needed for street use. If you do not track your car you wasted money in getting the brembo package (although hey they do look good). You should know what you're buying before you buy it. Stop using anti-squeak garbage that's probably decreasing your braking performance until it wears off and get used to it because it's not going to go away.
They didn't squeak once the first 10000 miles so I disagree with you. I DID know what I was buying before I bought it. Anti-squeal goes on the back of the pads so I don't see how it would affect brake performance.
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Old 07-31-2014, 03:58 PM   #12
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Brakes won't stop squealing

Quote:
Originally Posted by KARgt13 View Post
Anti-squeal goes on the back of the pads so I don't see how it would affect brake performance.

+1

The whole purpose is to hold them in place so they seat flush against the rotors, not move around where the edges of the pads could contact the surface first, causing the squealing as mentioned by another poster earlier.


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Old 07-31-2014, 04:28 PM   #13
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They didn't squeak once the first 10000 miles so I disagree with you. I DID know what I was buying before I bought it. Anti-squeal goes on the back of the pads so I don't see how it would affect brake performance.
Ah okay never mind about the anti-squeal then. They do normally squeal though, so is your squeal excessive? Squealing occurs due to vibration of the pad against the rotor. When the pad heats up it could be expanding which is why they stop squealing. Maybe they need to be reseated?
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Old 07-31-2014, 05:49 PM   #14
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My brembos have the same issue. Didn't start till I got close to 10k miles. Went to the dealership for them to check it out but they couldn't replicate the noise or otherwise found that any noise was within tolerance. So annoying. It sounds like mine are coming from the back though.


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