Noisy DS speedo
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Thread: Noisy DS speedo

  1. #1
    Fellow Frogger!
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    Default Noisy DS speedo

    Hi All,
    A quick question with hopefully an easy answer! The speedo on 3 dial dash(1974DS23) RHD has become very noisy, clicking at slow speed then whirring noisy at 50kmh onwards. Does the cable need greasing or is the gearing in the dash in need of lubrication?
    cable appears to be one piece from dash to gearbox.

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    Cheers,
    Ed

  2. #2
    UFO
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    CitroŽn Tragic UFO's Avatar
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    The cable should be a two piece. The join is usually just below the trumpet for the air filter on a carburettor engine. You should always undo this joint before trying to carefully extract the speedo binnacle. Some (a little) light oil inside the cable may quieten it some.

    Others will offer further advice.
    Craig K
    2009 C5 HDi Exclusive

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    VIP Sponsor richo's Avatar
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    If it is the speedometer clicking and whirring; the instrument needs servicing, the speed cup is probably in need of realignment.
    If the cable, then remove, and clean out thoroughly with a hydrocarbon solvent. Oil sparingly with lightweight oil. Do this anyway!
    Check the cable outer has not been kinked anywhere, check connections at rear of the instrument and the cable join where UFO suggested.
    Hope this helps.

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    UFO
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    Thanks Richo. You may even inspire me to remove and clean the speedo cable on UFO.

    Also Ed, be very careful with the screws when replacing the speedo binnacle. Do not over tighten them. They will snap the corners off the binnacle.
    Craig K
    2009 C5 HDi Exclusive

  5. #5
    Fellow Frogger!
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    Hi,
    Cable is definitely one piece, and seems very long, comes out of the bulkhead in behind the washer bottle and into the wing and out by the air horns and into the gearbox.
    The needle on the speedo jumps at low speeds and doesn't move in a smooth arc, I'll have a look at the dash end and try and lubricate.
    Ed

  6. #6
    UFO
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    It's been aftermarket replacement then.


    Craig K

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    Craig K
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  7. #7
    VIP Sponsor richo's Avatar
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    Now we've established a more detailed explanation of the condition...
    remove the cable, clean thoroughly with a solvent and oil lightly.
    Be certain the run for the cable is as smooth as possible, no kinks or tight bends. Pay particular attention to the condition of the outer cable and its insulation.
    Put car on jackstands and run in 2nd or 3rd gear at 1500rpm, with the instrument disconnected and check that the inner cable runs smoothly, without jerking.
    Provided the movement is smooth, attach to the instrument (engine stopped of course) and perform the operation described previously.
    If the instrument needle continues to jump then the speed cup in the instrument is likely at fault. Servicing and calibration is the next step.

    Hope this helps.

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