04-29-2024, 03:32 PM | #1 |
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Brake Noise
I have been having this extremely annoying brake squeal that only happens once the brakes begin to get some heat in them. (ie. from stop and go traffic or stopping from freeway speeds) When I take the car out after sitting it will not make the noise until the brakes have been used a few times. I originally had on Jurid pads and Zimmerman dimpled and slotted rotors and thought it may have been the pads so I replaced them with Hawk HPS 5.0 and had the rotors resurfaced. After doing those two things, I took the car out to test it and it continued to make the exact same squeal. I have tried different types of lubes on the pad backing plates but that doesn't seem to be the issue. If anyone has experience with this and has a solution please let me know cause this thing has been driving me insane. The squeal is not a healthy sounding one either like you would normally hear on most cars or m cars and they are a bit embarrassing.
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05-04-2024, 01:25 PM | #2 |
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Few questions first.
- Were Jurid pads installed together with new Zimmermann dimpled / slotted rotors (assume to be equivalent to M Performance OEM rotors? - Did the symptoms appear immediately or after some time? - Did your car have smooth rotors before? Any issues? |
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05-06-2024, 02:13 PM | #3 | |
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I replaced the jurid pads with hawks as a result and had the rotors resurfaced along with it. The car had smooth rotors when I first got the car from the original owner but were towards the end of their life so I didn't really have experience with them. Presumably no issues though. |
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05-06-2024, 04:06 PM | #4 | |
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BMW M Sport brakes - smooth rotors + softer OEM pads - work well for practically all driving conditions, offering an excellent initial aggressive bite. I suggest to consider returning to smooth rotors and OEM (or less expensive equivalent) brake pads. PS. There are many brake pads on the market and you may receive many suggestions favoring one over the other. In practice, what matters more is your driving style and whether you favor extending rotor life at the expense of shorter brake pad life (the by product is more brake dust - an entire normal outcome). BMW M Sport brakes - as an integrated braking system - favor extending rotor life. Any brake pad which is more suitable for tracking the vehicle is most likely not a good candidate. |
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05-06-2024, 04:19 PM | #5 |
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[BMW M Sport brakes - smooth rotors + softer OEM pads - work well for practically all driving conditions, offering an excellent initial aggressive bite.]
thanks for the explanation. must be why installing Akebono all around worked well with original rotors, untouched, for street only. |
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05-06-2024, 05:40 PM | #6 | |
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05-20-2024, 05:27 PM | #7 |
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OP, any time I've had that, it was the pads needed lubrication on the touch points on the calipers. It's usually during light braking, the pads get hung up on brake dust, and the bite "crooked" to the rotor causing the squeal.
A couple hard braking sessions with loosen them and square them, but the squeal will return until they are lubricated properly. |
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07-08-2024, 08:44 PM | #8 | |
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07-08-2024, 10:17 PM | #9 |
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Noise comes from where there's metal to metal contact between the pads, calipers and pad carriers. All of those contact points need caliper grease.
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07-08-2024, 10:41 PM | #10 |
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07-09-2024, 10:35 AM | #11 | |
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- grease on the lip of each piston where it touched the pads - "ears" of the pads that hangs on the calipers - the retaining pins where they touch the spring clips The pads should have "anti-squeal" plates on the back, and if those are in place, as well as the above is greased, they should be quiet (unless you have a caliper piston that is stuck so the pad applies crooked). Have you tried taking it up to highways speeds and do some really hard breaking to almost zero and then repeat? May just need to loosen the pistons up if they are seized with dust. |
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07-09-2024, 01:33 PM | #12 | |
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07-09-2024, 01:34 PM | #13 | |
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07-09-2024, 07:44 PM | #14 | |
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The sides get hung up in the calipers with brake dust. |
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07-11-2024, 02:42 PM | #16 |
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07-11-2024, 11:58 PM | #17 |
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Take a look here:
https://m.youtube.com/watch?v=PdwWRxyKQQQ I believe you could do it by hand, but they use a small sanding disc attached to a drill.
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07-14-2024, 10:33 PM | #18 |
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