What would cause a grinding/banging from the suspension?

Discussion in 'Wheels, Tyres, Brakes & Suspension' started by a lex, Sep 30, 2011.

  1. a lex

    a lex Member

    Messages:
    49
    Joined:
    Aug 3, 2011
    Car:
    W140 S280
    Hi folks,

    My cheap 97 S280 has a grinding/banging noise from what I believe to the front suspension - it sounds like left side, but appreciate diagnosing noises on cars can be a tough game!!

    I dont think its driveline as the noise can occur any time when the suspension is being manipulated, even when coasting in N.

    Like I say it happens basically any time the front suspension has to do some 'work', both low speed and high speed, when encountering bumps or obstacles in the road and when starting/stopping.

    My first thought was ball-joint as to be honest thats exactly what the noise sounds like - a ball rubbing in a dry joint.... but we had the wheels off 2 days ago for fitting new tyres and took the opportunity to have a poke around.

    There is zero lateral or vertical movement in the wheel and visually the ball joints look OK - we even had an iron bar prised in behind the wheel - and like I say, solid as a rock.

    The ARB droplinks are almost new and look it - all the other bushing we could easily see from the wheel arch also look good to excellent..... the car was last aligned by the previous owner about 10 months ago.

    The summer tyres that came off had worn quicker on the inside (no tread on the inner 1" of tyre, about 2mm across the rest). When driving you get a very occasional (slight) wheel wobble around 40mph - but its not bad at all.

    So, based on that does anyone have a diagnosis? Im thinking about taking it into a workshop, but the car cost so little to purchase any type of major repair is basically not economically viable.

    Any input gratefully received.
     
  2. OP
    OP
    a lex

    a lex Member

    Messages:
    49
    Joined:
    Aug 3, 2011
    Car:
    W140 S280
    F I X E D ! :)

    The anti-roll bar was fitted the wrong way around!! I guess it was done when the new ARB drop links were replaced (at a very reputable Merc specialist :nono:

    Anyway, im dead chuffed because its completely cured the problem and it only cost €35. Karma smiles on me for once :)
     

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