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Thread: More Disc Brake Noise! Arrggg!

  1. #1
    MoJo Mother Superior Disco Stu's Avatar
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    More Disc Brake Noise! Arrggg!

    New Shimano XT brakes. I went on a couple of rides with no probs. Now the front brakes make an awful creaking/squealing noise. I cleaned out the rotor, caliper, and pads, but the noise is still there.

    Any ideas?

  2. #2
    mOjO cHaUfuRr toonces's Avatar
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    Are XT pads 'cleanable'? I thought disk pads were easily contamitable. Like Hayes don't like being touched so I only clean rotors.

  3. #3
    try explaining the internet to a bum!
    MoJo SuppoRteR
    carlos's Avatar
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    rubber cgloves are the best way to clean rotors and pads. of course.....some warm water and dishwashing detergent are ideal as well.

    anyway, most companies suggest than when a pad or rotor is contaminated...toss it out and get a new one.

    that gets expensive fast.

    also, what did you use to clean the pads and rotors?

    it's possible that the pads aren't parallel with the rotor and are wearing a bit crooked. try making small adjustments to the caliper.

    also, Kona is pretty good about getting disc mounts aligned. very few problems if any.

    lastly, and this one's kinda goofy but i know some people have tried it and it works. find a big long hill. length is more important....as always. take a water bottle with you with filtered water. haul ass down the hill and feather the brake. half way down....don't get off the bike.....slow down to a speed where you can safely spray a good stream of water right at the rotor and pads......continue with the ass hauling and feather it the rest of the way.

    remember that you don't want to slow the bike down....you just want to drag the pads against the rotor.

    it make take two or three time.

    and use this as a last resort.

    checking the disc mounts of alignment will be a good idea as well as cleaning the pads with warm water and some dish washing detergent.
    Last edited by carlos; 12-27-2002 at 12:00 AM.

  4. #4
    MoJo Mother Superior Disco Stu's Avatar
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    I cleaned everything with warm, soap water. All was dry when I put back on.

    I don't think the pads are a problem, I swapped the front & rear pads & the same problem exists (Didn't clean the rear pads).

    What do you mean by adjustments? Shims?

  5. #5
    try explaining the internet to a bum!
    MoJo SuppoRteR
    carlos's Avatar
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    yeah...it might need to have one .025mm or .05mm shim added to either the upper or lower bolt.

    also, you mentioned soap water....try applying a pea sized dab of liquid dishwashing detergent directly to the rotor and scrubing the rotor on both sides with a plastic bristled brush.

  6. #6
    Rides On Sunday @ 9 AM Trapper's Avatar
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    My rear brakes were starting to squall a bit too. I did every adjustment imaginable until I ended up correcting it with new pads. The old ones were just worn out. (3rd set of pads... wooo!)

    One thing that can cause squeal is a slightly bent rotor. Eyeball the caliper to rotor clearance and spin the wheels. Watch the gap for any signs of clearance issues. A warped rotor sucks.

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