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Thread: Front knocking noise over speed bumps

  1. #1
    Regular Member korlinski's Avatar
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    Default Front knocking noise over speed bumps

    I have a vectra 3.2 v6. Noticed today that when i go over speed bumps get a knocking from passenger side.

    I have recently had my gear box and radiator replaced (auto gear box fault)

    Could they have not fitted something correctly? or is this something else like anti-roll bar linkage's etc.
    Last edited by korlinski; 6th June 2007 at 09:27.

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    Full Member VectraMat's Avatar
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    I got this in my facelift SRi, its only from going over speed bumps and the occasional bump in the road. its going in for a service soon so ill get them to sort it then, would be nice to know what it was though so i can give them a clue!

    VXR Gone - Now in BMW 320cd M Sport Convertible

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    Regular Member korlinski's Avatar
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    Does any one know if this is safe to drive?

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    Regular Member Marky's Avatar
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    Is it a knock or a twang???

    Have a look in here http://forum.vectra-c.com/forumdisplay.php?f=14
    Theres a couple of things it could be:
    Dodgy Spring.
    Spring moving in its seat.
    knackered bushes.

    Only the Dodgy Spring should be dangerous.
    Best to get it checked out though.

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    Regular Member R-man's Avatar
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    I think it'll be another case of the anti roll bar mounts - which by all accounts are getting replaced under warranty. Do a search on this and you should find a few threads on this subject.

  6. #6
    Regular Member korlinski's Avatar
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    Quote Originally Posted by R-man View Post
    I think it'll be another case of the anti roll bar mounts - which by all accounts are getting replaced under warranty. Do a search on this and you should find a few threads on this subject.

    Hope so. It sounds not a loud knocking, and its defo not a twang.

    I am having it MOTed on saturday so WIll the car be safe to drive till then? (going to Manchester today 400 mile round trip)

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    Regular Member korlinski's Avatar
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    Is there any easy way to check?

    I have had a look behind the passenger tyre, couldnt see anything.

    What/where should I look for, for the antiroll bar mounts?

    or spring problems? the springs looked fine. Nothing snapped.

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    Regular Member R-man's Avatar
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    I'm in no way qualified on this sort of stuff, but mine have been crunching over humps for ages and I haven't sorted it, nor have I died and I cover 250 ish miles a week normally. Like I say, I think you'll find that is what it is, it seems very common now, but only a garage can confirm for you.

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    Regular Member Majorlook's Avatar
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    Hi i had same problem it was a broken coil spring got it fixed under warranty but asked and it would have cost about £100 to fix.

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    I get bang twang and more @ times (not often). Its had the mod done, suspension has been off/on again since and done another 15K. Passed MOT and serivce with no mention.

    You should be fine but dont hold anyone to it.

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