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64 OHV 6 cylinder pistons

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  • Engine: 64 OHV 6 cylinder pistons

    The 64 OHV 6 cylinder pistons were changed a little bit from the 61-63 pistons; I believe the wrist pin was put off center. Does anybody know how much of an improvement, or advantage, this was over the previous pistons (61-63)? I'm rebuilding a 64 six cyl, and both are available to me. And if I use the 64 pistons, does anybody know the orientation of the off-center wrist pin to the block? -- thanks

  • #2
    Wouldn't they have "forward"> marks on the top of the Pistons that would orient the Pins correctly?
    StudeRich
    Second Generation Stude Driver,
    Proud '54 Starliner Owner

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    • #3
      The '64 OHV 6 piston rings are different from the '63 and earlier........one or more of the rings are a different thickness IIRC. Make sure you have a set available before you commit to using the '64 style pistons.
      Paul
      Winston-Salem, NC
      Visit The Studebaker Skytop Registry website at: www.studebakerskytop.com

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      • #4
        Hi Leon,

        If you give me your e-mail, I can send you the scans of the shop manual. There's 1 page and a half about the subject. Basically, the notch of the piston must be towards the front of the engine. This makes me wonder if I shoudn't have used 1964 pistons on my 1963 engine as the connecting rods are the same.
        Have a nice day.
        sigpic

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        • #5
          Originally posted by Leon View Post
          /Cut/I'm rebuilding a 64 six cyl, and both are available to me./Cut/
          I would be interested to know WHERE and how long ago, you found those '64 OHV 6 Pistons, as they are no longer available at all Studebaker Vendors that I know of.

          Rings are no problem, just different than anything else.
          StudeRich
          Second Generation Stude Driver,
          Proud '54 Starliner Owner

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          • #6
            Set of NOS pistons on ebay.
            Item number 321055930163
            Mono mind in a stereo world

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            • #7
              I have some notes somewhere that offsetting the wrist pins reduces the tendency of piston slap..
              64 GT Hawk (K7)
              1970 Avanti (R3)

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              • #8
                The 1964 pistons are an improvement over the 1961-63 pistons. The pistons are lighter and they use thinner rings (reduces 'ring flutter'). I believe the piston skirt and possibly the wrist pin position was changed, but they have the same deck height. So they can be used as direct replacements in the 1961-63 OHV 6's. Back when my dad rebuilt engines he always recommended the 1964 pistons. I still have a set in .040" Best of luck to you.

                Joe
                sigpic

                1962 Daytona
                1964 Cruiser
                And a few others

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                • #9
                  IIRC, '64's used "slipper skirt" pistons, and previous engines had full-skirt pistons. I know I have torn down '64's that were built that way.
                  Gord Richmond, within Weasel range of the Alberta Badlands

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