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Thread: knocking noise, over speed bumps ????

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    Default knocking noise, over speed bumps ????

    Signum cdti
    Get a loud bang/knocking when i go over speedbumps....always..it never goes away .. comes from the front/under floor area ?
    Any ideas ?

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    Not 100% but my neighbour had this prob and the cause was 'pig tails' (his words not mine!) on the spring need snapping off. I think its a little extra spring that has no use and if it moves it fouls the shock causing no damage but a loud noise. His brothers in the trade and he said he put it up on the lift and snapped them off. His is a 52 plate DTi. Hope this is of help.
    Steve

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    Full Member spennny's Avatar
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    Quote Originally Posted by Stephen S View Post
    Not 100% but my neighbour had this prob and the cause was 'pig tails' (his words not mine!) on the spring need snapping off. I think its a little extra spring that has no use and if it moves it fouls the shock causing no damage but a loud noise. His brothers in the trade and he said he put it up on the lift and snapped them off. His is a 52 plate DTi. Hope this is of help.
    Steve


    Check your drop links mate, i had the very same issue, loud clunking anytime i went over a speed bump, new set of droplinks and never heard it since

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    Cheers spenny.
    Ive got drop links to fit...not convinced it needs them...but...we'll see :-)
    Hopefully they'll fix it.


    Quote Originally Posted by spennny View Post


    Check your drop links mate, i had the very same issue, loud clunking anytime i went over a speed bump, new set of droplinks and never heard it since

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    Mine had a knocking pre MOT, it failed on a anti roll bar linkage. The knocking has stopped

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    Ive had the sump guard off having a look, cant see anything that would cause this problem.

    Its like a heavy clunking, only when going over speed bumps. Sounds like metal against metal.


    Quote Originally Posted by renry View Post
    Mine had a knocking pre MOT, it failed on a anti roll bar linkage. The knocking has stopped

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    Regular Member djr69uk's Avatar
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    does sound like drop links. mine does the same - going to change them this weekend if the weather is favourable.

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    Full Member bobssignum's Avatar
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    Vehicle : Signum 2.0 DTi

    Trim : Elegance/Elite

    Engine : 2.0DTi

    Year : 2003

    Mileage : 73350

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    I have just changed my drop links today , and it has made a huge difference ! .
    No more granching sound,s from the front end , nice easy job only took about 20 minutes each side and car is much quieter over speed bumps.
    Driving vauxhall,s for 30 + years
    and still loving it

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    Quote Originally Posted by renry View Post
    Mine had a knocking pre MOT, it failed on a anti roll bar linkage. The knocking has stopped
    mine had the same failure, which was replaced and passed MOT, but i'm still getting noise over speed bumps. more of a creak than a knock.

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    drop links replaced. no difference.
    Its a kind of creaking/rubbing noise !!

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