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Thread: Propane Model aluminum piston with oring dims needed

  1. #11
    Join Date
    Jun 2001
    Location
    North Central Texas
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    2,564

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    In addition to the previously mentioned reasoning - I would speculate that, since the piston is lapped to the bore and has very little clearance, the o-ring has a comparatively easy job.

  2. #12
    Join Date
    Sep 2009
    Location
    NW Illinois USA
    Posts
    768

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    OK, I can accept that orings can work for model IC piston seals.

    What is the bore material? Not trying to closely fit an aluminum piston in an iron bore? Might be some thermal expansion seizure. If it's aluminum bore probably a poor friction couple with aluminum piston.

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