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Dauntless Harmonic Balancer Variations?

Discussion in 'Early CJ5 and CJ6 Tech' started by truckee4x4, Oct 14, 2021.

  1. Oct 14, 2021
    truckee4x4

    truckee4x4 Grant Kaye 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Hey guys. I'm trying to make an accurate CAD drawing of the Daunltess harmonic balancer. Since I'm so far into my build I didn't want to pull mine off, so I sourced a spare one from a member here. The issue is that the spare one has smaller holes around the circumference of it than mine.

    Spare:

    UNADJUSTEDNONRAW_thumb_818b.jpg UNADJUSTEDNONRAW_thumb_818d.jpg

    Mine:
    UNADJUSTEDNONRAW_thumb_77ca.jpg
    Can one of the parts-gurus tell me if these switched over the years, or what goes to what engine? 225 versus 231? Are there any notable differences between the two that might not be obvious?
     
  2. Oct 14, 2021
    oldtime

    oldtime oldtime

    St. Charles,...
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    Part # GM1365024 never changed thru 1972.
    That said there are at least a couple of appearance differences.
    Here is a pic of my 1966 balancer.
    [​IMG]
    Here is a pic of my 1970 balancer.
    [​IMG]
     
    Last edited: Oct 14, 2021
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  3. Oct 14, 2021
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    upload_2021-10-14_10-43-5.png This one is for an OMC Buick stringer sterndrive. Looks kinda like the spare you have.
     
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  4. Oct 18, 2021
    Keys5a

    Keys5a Sponsor

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    I'm pretty sure the counterweight on the backside of the balancer is correct for the odd-fire engines. There were both odd-fire and even-fire 231's. The Odd-fire 231's were made from '75-'77, then later '77-up were even-fire.
    The differences in odd-fire balancers might be due to applications for the 225 vs the 231, but I have never compared them side by side.
    -Donny
     
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  5. Dec 13, 2021
    truckee4x4

    truckee4x4 Grant Kaye 2022 Sponsor 2021 Sponsor 2020 Sponsor

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    Does anyone have one of these as pictured above off of a Dauntless that I could borrow to measure? I have two spares now that are other variations, and this is the one that is on my engine. I'd rather not have to drain the cooling system and remove the radiator to access mine for accurate measurements.
     
    Last edited: Dec 13, 2021
  6. Dec 13, 2021
    Andrew Theros

    Andrew Theros Member 2022 Sponsor

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    Mine is on the bench right now. I’ll check when I get home.
     
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  7. Dec 13, 2021
    truckee4x4

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    That would be great, let me know. I will pay for shipping both ways and if you like I can even bead blast for you. Probably only need it for a couple days.
     
    Last edited: Dec 13, 2021
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  8. Dec 13, 2021
    Andrew Theros

    Andrew Theros Member 2022 Sponsor

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    F38168A2-CD24-41A1-9C85-0B6EF2BEE062.jpeg Here’s mine.
    55300DE2-E96D-4808-81D1-5F509969BA86.jpeg
    Let me know if this is the one.
     
  9. Dec 13, 2021
    truckee4x4

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  10. Dec 13, 2021
    Andrew Theros

    Andrew Theros Member 2022 Sponsor

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    I thought that might be the case when I looked closely at mine.
    Good luck!
     
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