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Serpentine Belt!

This is a discussion on Serpentine Belt! within the General Help forums, part of the LSx Technical Help Section category; Well guys i got my new alternator in, but i cant get this damn belt back on for the life ...

  1. #1
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    Serpentine Belt!

    Well guys i got my new alternator in, but i cant get this damn belt back on for the life of me! its all facing the correct ways and the tensioner is as loose as it can go!!! any thoughts? thanks!

  2. #2
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    2001 TRANS AM WS6

    IS it to loose or to tight

  3. #3
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    Quote Originally Posted by DIRTY JERZY View Post
    IS it to loose or to tight
    too tight!!! i cant fit it all around lol

  4. #4
    Moderator Firebirdjones's Avatar
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    If it came off easy,,,,and now is tight and difficult to get on,,,,and all you changed is the alternator,,,,then that has me thinking your new alternator has a larger pulley on it for some reason.


    Could it be possible that someone installed an underdrive crank pulley at one time,,,,,and then installed the overdriven (smaller) alternator pulley to compensate for low volts,,,,,which would require a different (smaller than normal) belt.

    Then when you switched alternators you now have a stock size alternator pulley, which makes it more difficult if not impossible to get the belt on.

    Or maybe it's simply the wrong alternator with too large of a pulley?????

    I'm just throwing ideas out here,,,,

    Or maybe you have one of those rare incredible shrinking belts......

  5. #5
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    Quote Originally Posted by Firebirdjones View Post
    If it came off easy,,,,and now is tight and difficult to get on,,,,and all you changed is the alternator,,,,then that has me thinking your new alternator has a larger pulley on it for some reason.


    Could it be possible that someone installed an underdrive crank pulley at one time,,,,,and then installed the overdriven (smaller) alternator pulley to compensate for low volts,,,,,which would require a different (smaller than normal) belt.

    Then when you switched alternators you now have a stock size alternator pulley, which makes it more difficult if not impossible to get the belt on.

    Or maybe it's simply the wrong alternator with too large of a pulley?????

    I'm just throwing ideas out here,,,,

    Or maybe you have one of those rare incredible shrinking belts......
    the alternator is a stock one that an ls1 mechanic i know gave me. the belt is a brand new one i bought at advance....and both the old and new pullys looks exactly the same....

  6. #6
    Member edbird's Avatar
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    1999 trans am convert

    Do the new and old belt look the same size?

  7. #7
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by slowss416 View Post
    the alternator is a stock one that an ls1 mechanic i know gave me. the belt is a brand new one i bought at advance....and both the old and new pullys looks exactly the same....
    Okay well,,,,just tossing ideas out there off the tip of my head. Did ya figure out what the hangup is yet?? Kinda hard to diagnose without actually being there.

  8. #8
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by edbird View Post
    Do the new and old belt look the same size?
    His original post didn't mention that he purchased a new belt,,,,,I was under the assumption he was reusing his old belt,,,,,correct????

    Or is there a new belt involved and I missed that piece of info????

  9. #9
    Member edbird's Avatar
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    He mentioned it in post #5 and you quoted in post #7.....or am I going nuts?

  10. #10
    Moderator Firebirdjones's Avatar
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    Okay that would explain it then,,,,,I posted in #4,,,,before there was any mention of a new belt. He didn't mention it in post #1 which is the one I responded to.

  11. #11
    That guy thearborbarber's Avatar
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    When I replaced my idler pulleys and the belt it was a pain to get the new belt on. I just had to spend some tie working it on.

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