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Thread: piston rings

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  1. #1

    piston rings

    I am replacing gaskets on my 07 lightning, I was jacking with the circlip on the wrist pin and the jug moved an the bottom two piston rings popped out. There is no way to know if they turned but my guess is that they prob did. Can I stuff them back in or do I have to hone and re ring?

    Thanks

  2. #2
    Senior Member Cooter's Avatar
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    Meh, run 'em.

    The SM instructions align with what our esteemed Barrett laid out for you and are for assembly, they will rotate when in use anyway so...

    Put them back in carefully though, jamming them in there and damaging the sealing edge is the oil problem, not their position.

  3. #3
    Senior Member 34nineteen's Avatar
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    I use a pocket clip of a ball point pen cap, or a popsicle stick to coax the rings back into their grooves.

    https://www.youtube.com/watch?v=sVzVwb_LUBo

    Scroll ahead to about 9:10 and Hammer Dan will tell you how its done.

  4. #4
    Senior Member Cooter's Avatar
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    Whats a ball point pen?











    Boomer.

  5. #5
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    Quote Originally Posted by Cooter View Post
    Whats a ball point pen?











    Boomer.
    You tell the old guy Cooter

    Oh yeah we only missed being Boomers by two years

  6. #6
    Senior Member 34nineteen's Avatar
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    Quote Originally Posted by Cooter View Post
    Whats a ball point pen?
    You're a ball point pen.



    Quote Originally Posted by Cooter View Post
    Boomer.

    Here's Boomer
    TV Series
    1980–1982
    30m
    The adventures of Boomer, a stray dog who travels the country helping those in trouble.


    Kind of sounds like you.

  7. #7
    Thanks everyone... Bit the bullet and honed and am installing new rings.

  8. #8
    Senior Member 34nineteen's Avatar
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    Quote Originally Posted by BuddyB View Post
    Thanks everyone... Bit the bullet and honed and am installing new rings.
    Make sure the ring gap is correct on the new rings. There isnt a whole lot of room for error, as its an air cooled motor and things will expand more than a water cooled motor, and be sure to measure at a few different spots in the bore. A pinched ring will bring you back to where you are at now, but worse. Almost all that I have had to deal with have needed some clearancing done.

    PS. In case Cooter offers to help and bring his ring file, keep in mind that the amount of beer he drinks will far exceed the price of the ring file.
    Last edited by 34nineteen; 06-16-2022 at 05:50 PM.

  9. #9
    Quote Originally Posted by 34nineteen View Post
    Make sure the ring gap is correct on the new rings. There isnt a whole lot of room for error, as its an air cooled motor and things will expand more than a water cooled motor, and be sure to measure at a few different spots in the bore. A pinched ring will bring you back to where you are at now, but worse. Almost all that I have had to deal with have needed some clearancing done.

    PS. In case Cooter offers to help and bring his ring file, keep in mind that the amount of beer he drinks will far exceed the price of the ring file.
    Well, the gap is within the SM specs, so are you saying' I should go a bit larger?

  10. #10
    As for the beer, I think that a case a jug is an appropriate barter for such knowledge and tool.

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