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Front brake squeal

Discussion in 'XJ Technical Chat' started by gitbox, Apr 7, 2010.

  1. gitbox

    gitbox Member

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    I've got new pads, rebuilt calipers, and smooth rotors. I did the pad chamfer trick and have ridden long enough to seat them but they still squeal when applying the brakes. Anything else I can do?
     
    gitbox, Apr 7, 2010
    #1
  2. Maxim-X

    Maxim-X Well-Known Member

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    Some brake pads have a shiny plate on the back of one, make sure that side is towards the piston, it an anti-rattle, anti- squeal device. Not sure if it applies to your bike as you didn't say which one.
     
    Maxim-X, Apr 7, 2010
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  3. RickCoMatic

    RickCoMatic Well-Known Member

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    Pull the Pads.
    "Chamfer" the Edges of the Pads.

    Chamfer means "Round-off the Square Edges.
    When the Square Edges of the New Pads contact the roatating Brake Disc ... Unless the Pads are Chamfered ... they will Howl.

    I have done hundreds.
    I used to Sand them.
    Now, that the Material is a harder Metallic.

    Take them to the Grinder and remove the Edge ... putting a rounded-off, blunt surface on the edge of the Pads.

    http://www.quattro123.com/Brakes200/MVC-233A.jpg
     
    RickCoMatic, Apr 7, 2010
    #3
  4. markie

    markie Member

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    I once used a product called "Anti squeal" which you sprayed on the back of the pads - it was like a rubbery coating.

    You could try some copaslip on the back of the pads?
     
    markie, Apr 7, 2010
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  5. gitbox

    gitbox Member

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    Thanks for the responses.

    Maxim-X, mine does not have those plates.

    Rick, I did chamfer the pads on my belt sander. Nice smooth edge just like the picture.

    Markie, I may try that if nothing else works.

    I did notice when I assembled the calipers that the spring metal piece that mounts above the pads didn't seem to do a whole lot. That is they weren't pushing on the pads that much, if at all. Do they have anything to do with brake squeal?
     
    gitbox, Apr 8, 2010
    #5

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