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  1. #1

    Join Date
    Jun 2018
    John Deere

    k321 piston hitting crank

    Hi guys, new here.
    I have a K321aqs, busted piston last summer. replaced it, ran about 3 hours, I set aside till last week, took it apart to find broken rod and cracked piston. Noticed today the pistonwrist pin boss had bed hitting on thr=e crank counterweight, any ideas????


  3. #2

    1,000 Post Club

    Join Date
    Jul 2017
    United States

    Re: k321 piston hitting crank

    What engine you got on that animal ???

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