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  1. #1
    Veteran Member Four Rings S4evr's Avatar
    Join Date
    Mar 07 2007
    AZ Member #
    16196
    Location
    Belmont, MA

    Strange grinding/scrapping sound when hard cornering

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    When i corner really hard (only when turning to the right) the left front wheel area experiences some very strange sounds. The best way to describe it i think, is a metallic scraping sound with a hint of grinding (high pitched grinding). Its almost as if the shield behind the brake rotor were scraping against the rotor when i turned hard (like, i gotta be going real fast and do a real hard turn) but it's not, checked that shield for any wear marks. Also, in the mornings when i back out of my driveway i will get a couple of intermittent clicks from the same side..

    could it be my cv joint giving out? the boot is still good and to my knowledge hasnt had any problems with it. Ill be autocrossing soon so i want to get rid of this problem

    lets shoot down a list of stuff that could make this sound
    1. Worn CV Joint
    2. Wheel bearing starting to go
    3. play in worn bushings causing stuff to scrape when high forces are applied
    4. something in the caliper/rotor assembly scrapes

    Also wanted to mention it feels like my rotors are a little bit warped, as they kind of hobble when slowing down.. so could this do something with it?
    ThorTechnik.com

  2. #2
    Veteran Member Four Rings
    Join Date
    Dec 06 2007
    AZ Member #
    23142
    Location
    Calgary, AB, Canada

    Re: Strange grinding/scrapping sound when hard cornering

    The noise is probably being caused by the wheel rubbing on the upright (or even on the fender) due to worn out upper CA's.
    The clicking could be a CV joint. Double check both outer and inner boots on that side.
    Take the wheel off and double check that everything in the brake assy is tight and free of play.

  3. #3
    Veteran Member Four Rings S4evr's Avatar
    Join Date
    Mar 07 2007
    AZ Member #
    16196
    Location
    Belmont, MA

    Re: Strange grinding/scrapping sound when hard cornering

    Quote Originally Posted by The_Jerbel View Post
    The noise is probably being caused by the wheel rubbing on the upright (or even on the fender) due to worn out upper CA's.
    The clicking could be a CV joint. Double check both outer and inner boots on that side.
    Take the wheel off and double check that everything in the brake assy is tight and free of play.
    its definetly not the wheel rubbing on anything, doesnt sound anything like it, and there are no wear marks.
    ThorTechnik.com

  4. #4
    Veteran Member Three Rings IamEzraM's Avatar
    Join Date
    Jul 21 2005
    AZ Member #
    7319
    My Garage
    2001.5 Audi S4 Santorin
    Location
    Bedford/MA

    Re: Strange grinding/scrapping sound when hard cornering

    ive got unusually loud scraping sounds coming from all (4) of my tires, the pass rear is particularily loud, and can be heard at low speeds when I drive next to a wall. The other wheel scraping seems to fade as a pick up speed. I looked at them closely, spun them by hand, and all I can visually see is the brake caliper might be rubbing against the outer edge of the rotors, because the brown oxidized rotor is showing bright silver at the edge next to where the normal brake pad pushes against. I'm thinking it might be wheel bearings making the noise, do they typically make noise as they fail, which might be S4evr's problem ?
    ***************
    My car is fast

  5. #5
    Veteran Member Four Rings
    Join Date
    Dec 06 2007
    AZ Member #
    23142
    Location
    Calgary, AB, Canada

    Re: Strange grinding/scrapping sound when hard cornering

    Ok, then check to see if the axle is rubbing on something, if there's play in the control arm bushings, etc.

  6. #6
    Veteran Member Four Rings S4evr's Avatar
    Join Date
    Mar 07 2007
    AZ Member #
    16196
    Location
    Belmont, MA

    Re: Strange grinding/scrapping sound when hard cornering

    replaced front rotors with ecs tuning slotted ones, replaced driver side front wheel bearing, and the driver, upper rear control arm was completely shot so i replaced that.. Problem is now gone!
    ThorTechnik.com

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