Renault 12 speedo cable replacement
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Thread: Renault 12 speedo cable replacement

  1. #1
    Fellow Frogger! IThompson's Avatar
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    Default Renault 12 speedo cable replacement

    I am in need of a speedo cable for a 1975 Renault 12 the 1289cc engine and gearbox. Jaygar speedo.

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    The plastic cable cover is cracked and leaking oil badly.

    Does anyone have a spare that I could purchase?

    Any suggestions on how to fix the cable cover?

    Ian

  2. #2
    COL
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    I would use heat shrink to repair the plastic cover.

    If you have oil leaking out of the speedo cable (this should not be happening) you will need to replace the "O" rings in the speedo drive in the gearbox. This can be done with the gearbox still in the car.
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    Regards Col

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    1000+ Posts schlitzaugen's Avatar
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    Col is right. Oil shouldn't exist in there, and at a guess I would say it is "climbing" out of the g'box past the o rings.. This is easily verified given the specific g'box oil smell.

    I would repair it as suggested, but before using heat shrink I would put some self welding tape, just to seal it off. Heat shrink is not good at that even if using glue heat shrink.

    Look at it this way. Now your cable is so well oiled it will probably last the rest of eternity.
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    Fellow Frogger! IThompson's Avatar
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    I bought all the various seals for the gearbox a while ago. I couldn't find where to put the little seal that was supposed to be for the speedo cable.

    There is a large green plastic thing in the end of the cable. Does this come away from the cable and contain a seal?

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    COL
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    Quote Originally Posted by IThompson View Post
    I bought all the various seals for the gearbox a while ago. I couldn't find where to put the little seal that was supposed to be for the speedo cable.

    There is a large green plastic thing in the end of the cable. Does this come away from the cable and contain a seal?
    It sounds like you have pulled the speedo drive from the gearbox, the green thing is the speedo drive.

    The green thing should pull off the cable.

    From memory there is two seals, one that seals from the green plastic to the gearbox and one that seals from the drive wheel axle to the green plastic bit.

    I can dig one up after work tomorrow and take a pic for you.
    Regards Col

    1973 Renault R12 Station Wagon
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    1000+ Posts REN TIN TIN's Avatar
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    Renault 12 speedo cable replacement-pr1012.31.50.jpg

    As mentioned in earlier posts, the speedo drive is a separate mechanism and the speedo cable screws onto the drive. They just pull out from the gear box with a bit of jiggling.
    If oil is leaking then the rubber seal is the likely problem or the internals of the drive are very worn.
    I'm not sure if the rubber seals are available (or what size they are) but replacement speedo drives are available overseas as the plastic gears do wear out.
    The cable itself shouldn't have any oil in it or very little and replacing just the cable won't fix the oil leak.

    Cheers Ren
    "I cannot help but notice that there is no problem between us that cannot be solved by your departure. Mark Twain"

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    COL
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    Here are some pics of the speedo drive:

    Complete speedo drive

    Renault 12 speedo cable replacement-fhd0068.jpg

    Looking from end where speedo cable goes and at the seal that is most likely leaking

    Renault 12 speedo cable replacement-fhd0070.jpg

    The little drive shaft

    Renault 12 speedo cable replacement-fhd0069.jpg

    With these pics and Ren's exploded view you should be able to fix your leak.
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    Regards Col

    1973 Renault R12 Station Wagon
    1976 Renault R12 Station Wagon
    2002 Renault Laguna V6
    1973 Alpine A110

    http://alpine-a110.weebly.com/

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    1000+ Posts REN TIN TIN's Avatar
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    But if you do want another cable anyway even though it won't fix your oil leak, there is one just posted on ebay today.
    About twenty-something Euro plus postage.
    "I cannot help but notice that there is no problem between us that cannot be solved by your departure. Mark Twain"

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