1936 16hp Neptune piston ring replacement

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  • March 5, 2016 at 3:01 am #3766
    Anonymous

      I am working on a 16hp neptune. I have so far replaced the crankshaft bearings and have the new piston rings on the pistons . My question is the pistons are a none pinned pistons so what should the orientation on the rings be ? Should the ring gaps be opposite of each other? Also does anyone know what the ring end gap should be?

      Thanks
      James

      March 5, 2016 at 2:28 pm #32952
      oltimer
      Participant

        Hi James
        The gaps should be staggered, and "away from exhaust and intake ports". You stagger them to retard compression loss. I have to be honest with you; my copy sheet for the Muncie/Neptune, 1936 Model # OB16 is very worn, and it looks like; but not sure of the .020 ring end gap clearance. Maybe someone else reading this about your 2 1/2 bore size could chime in for you? Above all make sure those new rings in that older piston fit snug; as you do not want wobble.

        March 5, 2016 at 3:31 pm #32954
        Tubs
        Participant

          A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.

          • This reply was modified 6 years, 9 months ago by Tubs.
          • This reply was modified 4 years, 5 months ago by Tubs.
          March 6, 2016 at 4:35 am #32999
          Anonymous

            Thank you very much for the information guys!

            James

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