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Rotax 582 crankshaft repairs.

in 2 Stroke Technical Questions 12 years ago
Could anyone offer any advice on pressing apart 582 Blue Head crankshafts to replace bearings.
Also availability of big end bearing kits?

  • Re: Rotax 582 crankshaft repairs.

    by » 12 years ago

    Hi Don

    Don't even go there. If I was you I would bite the bullet and buy a new crankshaft, if there is the slightest mark on the bearing bores in the crankcase, I would buy a short motor.

    Rotax recommend that you don't dis assemble the crank shaft and after some one doing one for me about 22 years ago, I would agree with them. If it was a motor cycle crankshaft, it would be a different story.

    There can be small pieces of metal from the bearings embedded anywhere in the engine.

    I would say you need a new, short motor.

    Mark
    Thank you said by: Don Cramer
      
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  • Re: Rotax 582 crankshaft repairs.

    by » 12 years ago

    Don,

    The end bearings can be replaced if you have the equipment and go strictly by the book and even then it's a risky operation. As for the inner bearings, Mark is right. Don't even think about it. I had a crank shop do one for me several years ago with disastrous results.

    Bill.
      
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  • Re: Rotax 582 crankshaft repairs.

    by » 12 years ago

    Thanks very much for the quick replies and the words of "comfort".
    Could you p[lease give me a brief outline of your attempted crankshaft repairs and outcomes.

    I will post some more photos of the bearings in more detail. Yes very interesting.
    In the very near future I will be contacting Rotax Austria directly.

    Regards and thanks,
    Don.
      
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  • Re: Rotax 582 crankshaft repairs.

    by » 12 years ago

    Sorry Bill ... forgot to ask.
    Where can i find "the book".

    Regards,
    Don.
      
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  • Re: Rotax 582 crankshaft repairs.

    by » 12 years ago

    Don,

    Rotax used to publish a two cycle version of the 912 heavy maintenance manual. I haven't seen it in quite some time and its not listed in the manuals available on this site. If you go to the california power systems 1-800-airwolf website you can go to the tech info tab at the top of the page and click on tech articles. I think I remember instructions in one of the articles there on how to change the outer bearings. Its been a while since I changed any but basically its a matter of chilling the crank and warming the bearings so everything slides together without a lot of effort. If you are familiar with this sort of job (and it sounds like you are) its not a big deal. I will say again though, the inner bearings are beyond my expertise and I wouldn't recommend even trying to change them.

    Bill.
      
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