Thrust bearing

Discussion in 'Mech Tech' started by Soggz, Jun 12, 2023.

  1. Zed

    Zed Gradually getting grumpier

    You've gained about 0.11 according to your numbers, more than doubled and now way out of spec.
    While calculating or just when you built it up finally?
     
  2. Soggz

    Soggz Supporter

    Finally
     
  3. Soggz

    Soggz Supporter

    Yes sorry, I was thinking about the max tolerance of 0.15…
     
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  4. matty

    matty Supporter

    I would sort it.
    It’s not going to get better on it’s own and depending on what wrong could make it worse at least re shim it back to spec.
     
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  5. Soggz

    Soggz Supporter

    That’s what I’m thinking Matty.
     
  6. You can't shim it out: you'll lock the crank up.

    A thought: did your engine guru clean up the end - the "snout" - of your flywheel when he was doing your engine? Anything he's machined off/skimmed will add to your measured endfloat, even though the "proper" endfloat is ok. If so, there's a fix for that.
     
  7. Soggz

    Soggz Supporter

    I can’t shim it out? Too much, is it? And no, he never did that.
     
  8. Zed

    Zed Gradually getting grumpier

    You have to decide. Did you cock up the initial end float setting or is the bearing moving because the machining wasn't up to snuff.
     
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  9. Soggz

    Soggz Supporter

    The setting was Deffo 0.10. I don’t know about the bearing moving, as I haven’t got the flywheel off yet. Going to try and do it tomorrow eve, if the sun hasn’t bbq ‘d me.:D
     
  10. Zed

    Zed Gradually getting grumpier

    Then the bearing is moving and once that's happening it will pound itself looser, not just sit there. Shimming won't help because you already set the gap between the bearing and flywheel with shims.
    I'd be hoping I'd cocked up!

    You could for experimental purposes add enough shims to definitely lock the crank then measure your "end float" like that. Any measurement must be the bearing moving in the case. No movement - you cocked up, do it again and do it properly this time. :)
     
    Last edited: Jun 14, 2023
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  11. I thought the case had been thrust cut and an oversize bearing fitted? Or have I lost the plot?
     
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  12. Soggz

    Soggz Supporter

    It had, that’s why I don’t know what has happened…
     
  13. Hopefully matey did the new bearing correctly. Have another measure.
     
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  14. Soggz

    Soggz Supporter

    I will get the flywheel off tommorow night and check for movement.
     
  15. No, I meant measure the endfloat with the flywheel on, again. You won't be able to measure anything meaningful with the flywheel off.
     
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  16. Soggz

    Soggz Supporter

    Sorry, I meant, take the flywheel off to see if the bearing was moving in the case…
     
  17. Could try it. I'd doubt you'll be able to see anything. If your bloke has done his work correctly, it shouldn't be moving at all.
     
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  18. ...in which case - if it's been done correctly - just shim out whatever free play is there...
     
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  19. Soggz

    Soggz Supporter

    The flywheel will have to come off either way.
     
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  20. Need a new oil seal, don't forget!
     
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