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Loosening Alternator

Discussion in 'Fuel System & Electrics' started by BrissyGeorge, May 16, 2017.

  1. BrissyGeorge

    BrissyGeorge Active Member

    Messages:
    318
    Location:
    Brisbane
    Hi,

    For sometime the alternator on my 2L engine has been giving me grief - it continually comes loose meaning the fan belt looses all its tension. No matter how hard I gorilla the locking bolt, in a week or so the alternator has slipped and the fan belt is loose, yet the bolt is still tight.

    Any ideas?

    cheers
     
  2. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,960
    Location:
    Avalon Beach NSW
    Have you tried tightening the bottom bolt that the alternator pivots on......?
    Cheers,
    Mark
     
    Grantus likes this.
  3. Old Dubber

    Old Dubber Active Member

    Messages:
    275
    Location:
    Everton Hills, Brisbane
    Got enough thread on the bolt?
     
  4. Wayne murray

    Wayne murray Well-Known Member

    Messages:
    4,738
    Location:
    Seven hills
    Is it the correct bolt and is it to long and bottoming out . Stripped .Just a thought
     
  5. steve_4802

    steve_4802 Active Member

    Messages:
    272
    Location:
    Sunshine Coast
    Like oldman suggested, I've found (accidentally) you can just about get it to hold on the bottom bolt alone, if tight. So if all looks right at the top you could band-aid fix it by giving the bottom bolt some more.
     
    Grantus likes this.
  6. BrissyGeorge

    BrissyGeorge Active Member

    Messages:
    318
    Location:
    Brisbane
    Oldman and Steve- you are the winners

    The bottom bolt was loose - gave it a tighten and will check the belt tension in a week or so.

    The bad news is the the bolt that attaches the bottom end of the curved adjuster plate to the heater box has shorn off - bugga!!!! More work.

    Thanks again for your help
     
  7. oldman

    oldman Super Moderator Staff Member

    Messages:
    10,960
    Location:
    Avalon Beach NSW
    Love an easy fix...;)
    Cheers,
    Mark
     
  8. Mordred

    Mordred Super Moderator Staff Member

    Messages:
    3,012
    Location:
    Penna, Hobart
    Those heater box bolts are often corroded so badly that when you try to remove them the heads shear off regardless. If you cant get it out you might be better drilling it and then cutting a new thread in to it. It doesn't appear to have a stupid amount of load on it. It isn't critical to the operation of the alternator, as most of the load is on the bottom bracket but it will help with reducing any wobble vibration which will make the aluminum of the case of the alternator become brittle.

    Adrian
     

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