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  1. #1
    Veteran Member Three Rings Quattro_2.7tt's Avatar
    Join Date
    Jan 22 2009
    AZ Member #
    37782
    My Garage
    2007 S8, 2004 A6 4.2 6 MT swap, 2008 A6 S-line 3.2,
    Location
    Scottsdale, AZ

    Rear brake pads rattle

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    So my rear brake pads are about halfway on pad life. I notice when I go over bumps I hear a rattling noise from the rear of the vehicle. If I hold the brake pedal just a bit the rattle went away. I noticed the rear pad clips had come out of place so I put them back and no noises. Then about a week later it started doing it again!

    Am I not putting the pads back into place correctly or is the wrong pads back there? Any help would be nice, this noise is annoying!
    Current: 07 D3 S8 V10 - stock.
    04 C5 A6 4.2Q 6 MT swap and a lot more mods.
    08 C6 A6 3.2Q S-line - stock

    Sold:
    05 B6 S4 6MT
    01.5 B5 S4 6MT
    00 B5 S4 6MT x2
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  2. #2
    Veteran Member Three Rings AutoUnion1's Avatar
    Join Date
    May 28 2008
    AZ Member #
    29306
    My Garage
    Bronco, Q3, Alfa Romeo
    Location
    Michigan

    Could be the wrong pad or the spring has just worn out. I'd start by pulling the pads and cleaning the caliper with a wire brush then re-apply the pad grease. Those springs are a real pain to get into position, make sure you position them correctly.

  3. #3
    Veteran Member Three Rings joe dub's Avatar
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    Sep 01 2008
    AZ Member #
    32589
    Location
    Illinois

    you need to load up the caliper pins with grease.
    silver - RIP
    black - TAILS

  4. #4
    Senior Member Two Rings Corrado's Avatar
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    Apr 07 2010
    AZ Member #
    57317
    Location
    MidAtlantic

    Quote Originally Posted by joe dub View Post
    you need to load up the caliper pins with grease.
    I had the same problem, it drove me crazy at low speeds in the city...the rattle went away when lightly applying the brakes. After giving them a good coating, the rattling stopped.

  5. #5
    Veteran Member Three Rings Quattro_2.7tt's Avatar
    Join Date
    Jan 22 2009
    AZ Member #
    37782
    My Garage
    2007 S8, 2004 A6 4.2 6 MT swap, 2008 A6 S-line 3.2,
    Location
    Scottsdale, AZ

    Quote Originally Posted by Corrado View Post
    I had the same problem, it drove me crazy at low speeds in the city...the rattle went away when lightly applying the brakes. After giving them a good coating, the rattling stopped.
    Okay thanks, I will try this. I am replacing the pads and rotors very soon.
    Current: 07 D3 S8 V10 - stock.
    04 C5 A6 4.2Q 6 MT swap and a lot more mods.
    08 C6 A6 3.2Q S-line - stock

    Sold:
    05 B6 S4 6MT
    01.5 B5 S4 6MT
    00 B5 S4 6MT x2
    99.5 B5 A4 1.8tq 5MT
    05 A6 3.2 Quattro

  6. #6
    Active Member One Ring
    Join Date
    Dec 27 2013
    AZ Member #
    137225
    Location
    London UK

    Did greasing the pins get rid of the rattle?

    Quote Originally Posted by Quattro_2.7tt View Post
    Okay thanks, I will try this. I am replacing the pads and rotors very soon.

  7. #7
    Active Member Four Rings DxC's Avatar
    Join Date
    Nov 16 2006
    AZ Member #
    13436
    Location
    Boston

    It's the springs that hold the rear pads. Common issue

  8. #8
    Active Member One Ring
    Join Date
    Dec 27 2013
    AZ Member #
    137225
    Location
    London UK

    Im having this rattle on the fronts of my A6 C6 3.0tdi.

    I have just fitted new genuine pads and discs and there is absolutely no change - they still rattle. The caliper pins were bone dry however - I didnt know they were supposed to be greased up. In any case, I couldnt believe the forwards and backwards flex of the caliper. When I manually manipulated it, I could clearly see that it was momentarily creating room for the pad to rattle. The pad is WELL fixed to the caliper with the springs on the back.

  9. #9
    Veteran Member Four Rings getslideways's Avatar
    Join Date
    May 16 2008
    AZ Member #
    28851
    Location
    WA

    Quote Originally Posted by joe dub View Post
    you need to load up the caliper pins with grease.
    Quote Originally Posted by DxC View Post
    It's the springs that hold the rear pads. Common issue
    First off, although one of these posts was made a long time ago... THANK YOU!!

    Quote Originally Posted by mrmule View Post
    Did greasing the pins get rid of the rattle?
    For me it did. I had the same issue a few months after a recent brake change, the rear would make a little metallic rattle over uneven surfaces. However if I applied the ebrake and went over those same roads again it would be quiet. So i was able to narrow down something with the rear brakes.

    I cleaned the pins and reapplied a generous amount of brake grease, sometimes pulling them out and reapplying a few times. You can grab the pins when inserted and check for side to side movement, before I pulled the pins there was just barely a little movement, after regreasing there was none. I then checked the boots for wear, then reinstalled everything (if you put too much grease you'll know it as the pins will try to self eject and the boots will look like the Michelin Man upon compression). I also bent the pad springs out a bit to allow a tad more pressure, and applied a dab of brake grease to all contacting surfaces. Rattle is now gone.

  10. #10
    Active Member One Ring
    Join Date
    Dec 27 2013
    AZ Member #
    137225
    Location
    London UK

    I havent greased the pins yet, but I did find out I was missing the clips which stop the calipers moving fore and aft (front and back). Nice new shiney ones:





    Quote Originally Posted by getslideways View Post
    First off, although one of these posts was made a long time ago... THANK YOU!!



    For me it did. I had the same issue a few months after a recent brake change, the rear would make a little metallic rattle over uneven surfaces. However if I applied the ebrake and went over those same roads again it would be quiet. So i was able to narrow down something with the rear brakes.

    I cleaned the pins and reapplied a generous amount of brake grease, sometimes pulling them out and reapplying a few times. You can grab the pins when inserted and check for side to side movement, before I pulled the pins there was just barely a little movement, after regreasing there was none. I then checked the boots for wear, then reinstalled everything (if you put too much grease you'll know it as the pins will try to self eject and the boots will look like the Michelin Man upon compression). I also bent the pad springs out a bit to allow a tad more pressure, and applied a dab of brake grease to all contacting surfaces. Rattle is now gone.

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