Cheap Cure for Suspension Noise

Discussion in 'Wheels, Tyres, Brakes & Suspension' started by l5foye, Apr 13, 2007.

  1. l5foye

    l5foye Hardcore MB Enthusiast

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    My friend's E320 cdi developed a noise from the front suspension. It turned out to be a worn bushing at the bottom of the shock absorber. The cure - remove bushing, separate rubber bushing from metal insert, lag insert with insulation tape, hammer insert back into bushing, re-assemble and refit shock. Result- no noise. Cost-5p. No insulation tape, then use a cutting from a plastic bottle. Life of repair = indefinite ( last repair of this nature on a different car is still good after 30000 miles)
     
  2. Will

    Will MB Club Veteran

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    Glad to hear that it has worked ok but just curious as to why you'd take this approach instead of fitting a new bush? :)

    Will
     
  3. Flash

    Flash Hardcore MB Enthusiast

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    Bcause it only cost 5P...! :D
     
  4. Howard

    Howard MB Club Veteran

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    How much is a new bush ?

    10p ? ;)
     
  5. kth286

    kth286 Hardcore MB Enthusiast

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    all

    It is likely it need not have cost anything ............because if the suspension has been disturbed previously, then the technician did not let the car down on the suspension before tightening the damper lower fixing.

    By correctly loading the suspension first before tightening the rubber, it will be in the corrrect position and its elasticity will allow for suspension movement without noise due to excess twisting action.

    However, as in this case, the car damper lower fixing was probably tightened when the suspenion was hanging free of load. Then when the car was lowered the rubber was not in it's normal relaxed state but was under the stress of a twisting action already. Then when the car was driven it was under more twisting stress, more than it was designed for, and of course something had to give, and the squeeking occurred.

    So in conclusion, all that needed to be done was to undo damper bolt, jack car so that fixing point was free of load, lower car down so that load was now on the fixing point which restored the rubber to it's natural state, THEN tighten the bolt. Nil cost and very quick.
     
  6. OP
    OP
    l5foye

    l5foye Hardcore MB Enthusiast

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    The noise was not a sqeaking but a knock (going over a pothole, for example) There was quite severe wear on the part of the shock absorber where the bushing fits into. Normally the only effective cure would be to fit a new shock absorber ( in fact, 2 as it is a bad idea to fit 1 new shock)
    So it is not a case of 5p versus 10p but 5p versus a lot more (I haven't priced new shocks for a long time)
     
  7. kth286

    kth286 Hardcore MB Enthusiast

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    l5foye

    OK, but I am sure you agree that would not have happened if the rubber was not under undue stress and the bolt had been tightened properly.
     

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