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Earth Battery Cable

Discussion in 'Bay Tech Clinic' started by newbi, Dec 6, 2021.

  1. newbi

    newbi Member

    Messages:
    77
    Location:
    Central Coast
    Hi everyone
    i want to replace the Earth Battery Cable as i think its past its used by date
    my question is if i remove the bolt holding it to chasis will i be able to put back in same place. Is there a nut on other side that will fall of when i remove it.
    Also what is a good battery to use

    ive attached a pic
    Pic16.jpeg
     

    Attached Files:

  2. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    4,740
    Location:
    Seven hills
    Normally there is a captive nut on the other side, unless a previous owner has worked there magic.o_O:eek:
    So you should be able to undo the bolt and then replace earth strap and put back the bolt.
     
    Wiz likes this.
  3. newbi

    newbi Member

    Messages:
    77
    Location:
    Central Coast
    cheers mate, i thought there would be
     
  4. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,971
    Location:
    Avalon Beach NSW
    .....and make sure you get a good bare metal contact to the chassis.
    Poor earth strap connections contribute to a host of common electrical problems.
    Cheers,
    Mark
     
    Wiz likes this.
  5. newbi

    newbi Member

    Messages:
    77
    Location:
    Central Coast
    ill hit it with some sand paper
     
  6. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,971
    Location:
    Avalon Beach NSW
    Don't just scratch it.....you really need clean, bright metal......as if you were prepping for a weld. ;)
    Cheers,
    Mark
     
    grumble likes this.
  7. cbus

    cbus Well-Known Member

    Messages:
    13,565
    Location:
    sunshine coast
    And you are right.
    They often look ok but have very high resistance.
    Change the one that goes from chassis to gearbox/ bellhousing as well.
    If replacement is a round insulated item ,put a loop in the one from chassis to allow free flex.
     
    Last edited by a moderator: Dec 6, 2021
    syncro, oldman and Wiz like this.
  8. newbi

    newbi Member

    Messages:
    77
    Location:
    Central Coast
    i dont weld so what would be best clean it with (i have a very fine wet and dry sandpaper or a paint remover attachment for drill
    and cbus i dont know what you mean
     
  9. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,971
    Location:
    Avalon Beach NSW
    When prepping for welding, the golden rule is clean the metal until it is bright, shiny metal.
    If you just scratch around with sandpaper it won’t matter how good the new strap is, the connection will be compromised.
    Wire brush attachment on a drill or better yet would be a fine flapper/strippit disc.
    Bolt up the new earth strap and then treat and paint any remaining exposed metal.
    Cheers,
    Mark
     
  10. cbus

    cbus Well-Known Member

    Messages:
    13,565
    Location:
    sunshine coast
    What part .
     
  11. syncro

    syncro Well-Known Member

    Messages:
    10,367
    Location:
    Southern Highlands
    I wouldn't go around cleaning any paint off. Just clean up the corroded bits and make it like it came from the factory. After all it has worked OK like this for the last 45 years.

    Buy a proper earth lead. Why butcher it? Probably better to buy a new bolt and washer. Make sure it is zinc plated. Whatever you do, do not use stainless.

    The factory uses zinc bolts for earths for galvanic effect. Any bare metal will become plated as the electrons move from negative to positive.
     
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  12. 1500king

    1500king Well-Known Member

    Messages:
    1,683
    Location:
    Adelaide, SA
    Your first problem is the Super-leak battery. If the clamp is not rotten/rusted away, just clean it up. Check resistance. If it's more than 0.2 ohms , then it is no good. Doesn't look too bad from here and will not stop the car from starting/running.
     
    syncro likes this.

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