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Thread: knocking noise from rear wheels

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    Default knocking noise from rear wheels

    I have a slight knocking noise from rear wheels on both sides when driving on uneven roads, and theres a lot of uneven roads here.
    I looked at the drop links and the anti roll bar bushes and they look ok.
    It could be the upper control arms, is there any way of checking this.
    Car has almost 80k miles.

  2. #2
    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

    Trim : LE/VXR

    Engine : 2.0 cdti/1.6 Turbo

    Year : 13/07

    Default

    Although the ARB bushes look ok don't rule them out, the slightest bit of wear and they will knock.

    To check the UCA's, with the car on the ground grab the top of the road wheel and sharply tug it. If they are knackered you'll hear (and feel) them knocking

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    Quote Originally Posted by john.robertson2 View Post
    Although the ARB bushes look ok don't rule them out, the slightest bit of wear and they will knock.

    To check the UCA's, with the car on the ground grab the top of the road wheel and sharply tug it. If they are knackered you'll hear (and feel) them knocking
    Thanks for your reply, John.
    I done as you explained today, doesnt seem to be any movement there. Im sure it will become obvious soon enough, where the problem part is.

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    I have that knocking noise too. Replaced ARB bushes but the noise is still there. Very annoying! Also have a fault showing for headlights even though they're fine. Disconnected battery and ecu but fault still showing. Any ideas?

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    Quote Originally Posted by darrensten View Post
    I have that knocking noise too. Replaced ARB bushes but the noise is still there. Very annoying! Also have a fault showing for headlights even though they're fine. Disconnected battery and ecu but fault still showing. Any ideas?
    Hi Darren,

    Did you replace the drop links too? Did you check the UCA's for movement as suggested by others.
    I've done nothing to mine yet, I know its not serious just a bit annoying as you said.
    I mite disconnect the drop links on each side tempararly and take it for a short run, If the knock has gone then its either the drop links or ARB bushes and will change the lot.
    If the noise is still there then its something else, probably UCA's startin to go. That what I think.
    I wouldn't have any ideas about the headlights, but if you start another thread I'm sure someone will help.
    Cheers

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    Turns out it was the shocks all along. Parts man in main dealer said they wear on the inside with no visible defects, he said it was fairly common. Got spurious shocks €70 each.

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