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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Clunk sound after brake change



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      09-04-2016, 11:26 AM   #1
maajka
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Clunk sound after brake change

I recently changed all 4 rotors and pads on my 11 335i with Zimmerman rotors and akebono pads. Install went good and it was not my first time doing brake work but it was for this car.

After it was all done I went for a ride to bed the brakes and everything was good, no noises or shaking.

The following day I noticed a clunking sound when braking a lil harder at lower speeds. If I came to a stop slowly u don't hear it but if it's more aggressive stops then I would hear it in the drivers use tire as well as feel it under my feet.
Braking from 60mph to 20mph does not make the sound. There is also a sort of huming noise while driving.

I have searched but did not find much...people report hearing this over bumps but mine is only when brakes are applied... No shake in steering wheel

Any help would be greatly appreciated
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      09-04-2016, 12:15 PM   #2
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Did you apply any anti-seize paste on the backs of the new brake pads and on the various applicable areas on the callipers, pins etc? Sometimes there is just enough play between the calliper and the brake pads that they move enough to create a nasty knock sound when braking, and typically if you have braked while reversing, and then brake when driving forward as normal you will hear this. And it's only at lower speeds that you would hear this. Just a thought.
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      09-04-2016, 01:12 PM   #3
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Take off wheels and double check that you everything is still tightened. Could be lose bolt on the bracket.
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      09-06-2016, 05:12 PM   #4
maajka
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Took the driver side brakes apart again and made sure everything that was supposed to be lubricated was and all bolts are tight. One thing I noticed is the bottom slide pin being 2 piece? And the part that is close to the threading slides back and forth....about 1/8 of an inch or so....I didn't notice this before or on the passenger side

Wondering if this could be causing the noise and if anyone else noticed this

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      09-06-2016, 06:00 PM   #5
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Which number on the diagram?
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      09-06-2016, 06:38 PM   #6
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Quote:
Originally Posted by Three_thirty_I View Post
Did you apply any anti-seize paste on the backs of the new brake pads and on the various applicable areas on the callipers, pins etc? Sometimes there is just enough play between the calliper and the brake pads that they move enough to create a nasty knock sound when braking, and typically if you have braked while reversing, and then brake when driving forward as normal you will hear this. And it's only at lower speeds that you would hear this. Just a thought.
This is your issue. It is very common with the Akebono pads. There is too much play between the caliper and the pad. Every time you brake the pad shifts in the caliper making a clunking sound. It won't do it every time, only when you've driven enough for the pads to loosen up a little.

I thoughts Akebono had fixed this, but I guess not. When did you buy your pads?

Someone mentioned using the orange brake quiet crap. I guess it hardens to a rubber-like consistency and will reduce the noise from the pads. I'm don't believe this to be a long-term solution however.
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      09-07-2016, 08:59 AM   #7
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Bought the whole set pad and rotors 2 weeks ago....hmm I even researched a bit to get a decent set but it didn't say anything about akebono pads not fitting right....maybe ill just have to go with oem pads
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      09-07-2016, 09:34 AM   #8
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Quote:
Originally Posted by ferocity02 View Post
This is your issue. It is very common with the Akebono pads. There is too much play between the caliper and the pad. Every time you brake the pad shifts in the caliper making a clunking sound. It won't do it every time, only when you've driven enough for the pads to loosen up a little.

I thoughts Akebono had fixed this, but I guess not. When did you buy your pads?

Someone mentioned using the orange brake quiet crap. I guess it hardens to a rubber-like consistency and will reduce the noise from the pads. I'm don't believe this to be a long-term solution however.
Quote:
Originally Posted by maajka View Post
Bought the whole set pad and rotors 2 weeks ago....hmm I even researched a bit to get a decent set but it didn't say anything about akebono pads not fitting right....maybe ill just have to go with oem pads
Yes, Akebono pads are most likely the culprit as backing plate is slightly smaller that it need to be allowing the pad to shift constantly and causing clunks.
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      09-07-2016, 12:10 PM   #9
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I emailed Akebono last night and they recognized the issue and are sending me a set of pads in which this has been corrected. So it looks like they have updated the design.
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