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Thread: Diagnosing suspension knock

  1. #1
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    Default Diagnosing suspension knock

    I get a knock from what i think is the front drivers side everytime i go over pot holes, speed bumps or just really bad roads. I'm assuming its going to be one of three things:

    a) Top strut mount
    b) Drop links
    c) ARB bushes

    How would i go about confirming which one of those it is (if any), preferably the less taking apart of the car as possible as i have to do all my work on a mini factory car park across the road.

    Thanks for any help

  2. #2
    Regular Member tangoman's Avatar
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    Vehicle : VXR Estate

    Trim : VXR

    Engine : 2800

    Year : 2008

    Mileage : 3000

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    Drop links-With the car on the ground reach behind the front wheel and grab the link rod. Any movement/frre play is bad news.
    ARB Bushes- Jack up the front of the car and look at the mounting bush, if you see any gap at the bottom then replace.
    I would go for these items first as cheapest and easiest to replace.
    Not sure how to check movement in the Top mount

  3. #3
    Regular Member Dan_BlackSRi's Avatar
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    Vehicle : Vectra SRi

    Trim : XP1

    Engine : 1.9 CDTi 150

    Year : 2007

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    Quote Originally Posted by tangoman View Post
    Not sure how to check movement in the Top mount
    They usually make the noise when the steering passes the centre mark, you get a twang/clunk from the offending strut, get someone to turn the steering from side to side while you feel the springs/struts (if you have room to obviously). Cheap part to buy, bit a pain to replace (remove strut etc).

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    Default

    Well i've been out today, there feels like there's about 1mm play in each droplink, so im assuming they need replacing. and whilst im at it i may as well replace the arb bushes as the passenger side looks pretty bad.

    Some pics of the bushes: http://imgur.com/a/FHU3x

    So uprated droplinks and them powerflex? bushes will need to be ordered this weekend so i can get them replaced next saturday. Looks like i'll have to do some forum searching for the actual names and P/N's i need

    Thanks for the help both

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