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Thread: Knocking noises - Help!

  1. #1
    Regular Member mishima's Avatar
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    confused Knocking noises - Help!

    Hi there,

    As of yesterday I have had this problem with my pre-face lift Vectra C (2.0 DTI). When I'm travelling under 20 I can hear a knocking noise, this is especially noticable when approach lights or slowing down for them.

    I know the front ARB need replacing as I've had sqwelching noises for months now when going over speed bumps.

    I've renewed the front drop links about 6 months ago.

    Anyone any ideas what the problem might be? I'm doing a 500mile trip next week and I'm feeling a bit worried about driving it in the veccy.

    Thanks in advance!

  2. #2
    Regular Member Ben999's Avatar
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    My first tip would have been the drop links. Could either be the bushes. Or the rear upper control arm? Both of those would cause knocking noises if they needed replacing.

  3. #3
    Regular Member mishima's Avatar
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    Thanks Ben,

    Does the Vectra C have rear drop links also?

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    Regular Member mishima's Avatar
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    Ok the front ARB's have been done, noise is still there. any ideas??

  5. #5
    Regular Member mishima's Avatar
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    Just been out with some friends in the Vectra and they both say it's coming from the back right area of the car.

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    It could be the rear upper control arm, it's a common failure on the vec/signum

  7. #7
    Regular Member mishima's Avatar
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    How do I check for this mate?

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    Have a read here: http://www.vectra-c.com/forum/showth...r+control+arms

    to check for the fault you need to jack the rear up & give the rear wheel a good wiggle, that should let you know if there's any play.
    hth

  9. #9
    Regular Member mishima's Avatar
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    Jacked it up tonight and gave the wheel a good wiggle and ran it and no problems there. Took it out for a drive with my dad in the boot (lol) and he could hear the clunking noises coming from the driver side rear wheel area. We've tried jacking it up slightly and getting a pipe under the wheel and jigging it and we can hear something but it's really hard to pinpoint that the problem is.

    Going to buy a control arm tomorrow and perhaps some ARB bushes for the rear just incase this doesn't solve it.

    Thanks for your help so far, if anyone has anymore to say on this post up!!

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    Regular Member Dose's Avatar
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    I think that may be your problem mate...

    get it sorted and get that ****** spoiler fitted for us all to see

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