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Thread: vectra 1.8 duelfuel 2003 knocking at rear

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    Default vectra 1.8 duelfuel 2003 knocking at rear

    hi there had car a few days and when driving over pot holes and rough ground it knocks at the rear quite a lot its horrible. silent when on motorways and flat roads i cant see out ? it seems to be brake related cause when i press brake in it creaks and if i let go of pedal i get the knock but like something hanging and sort of knocking away . just cant see out under rear . not checked it out properly yet with all this dark nights and working. like i say its really smooth on flat road and motor way. its just over rough ground . weird .

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    bump

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    Default Bump

    I have the same problem on my 03 3.2

    good job i do lots of motorway miles.
    can anyone help diagnose this?

    cheers
    alex

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    Regular Member dave b's Avatar
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    Almost certainly the rear trailing arm links need replacing. They are banana-shaped linkbars with a rubber bush in either end, available via eBay or local motor factors fairly cheaply. Change the rear anti-roll bar bushes whilst you're under there too (also very cheap)
    That should solve your problem, it worked for me.

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    Regular Member Ste's Avatar
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    It is easy to check for wear in these 'top link' bushes.

    Park with handbrake on and grasp the rear wheel at the top and wobble in / out. You will find it feels like and move likes the wheel bolts are loose if the top link bushes are shot.

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    Regular Member dave b's Avatar
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    Also, if you feel the car do a "side to side shimmy" at the rear while cornering and you hit a pothole or manhole cover, this would suggest the same fault.

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