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Thread: Overhaul O-290D2 or Swap for O-320?

  1. #21

    Join Date
    Mar 2017
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    Default Re: Overhaul O-290D2 or Swap for O-320?

    Quote Originally Posted by PA-16 View Post
    These have been on eby for a long time, but the box lable skips right over C1 so might not be the right pn

    Yeah, they are .020 oversized, Iím looking for Standard. I donít want to bore my cylinders.there was another set that was only .010 over, but again, with standard size cylinders I donít want to go oversized. Thanks for the heads up though!


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  2. #22
    RRHall's Avatar
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    Jun 2020
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    Default Re: Overhaul O-290D2 or Swap for O-320?

    According to Lycoming the correct current part number for O-235C1 pistons is 14B28072. It is a 3 ring piston. Piston, Compression Ratio6.75:1 you can look at SI 1037W dated April 28 2020.

  3. #23
    dbudd's Avatar
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    Jan 2011
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    Default Re: Overhaul O-290D2 or Swap for O-320?

    Need a 0-290 D-2 cylinder anybody have one? And is the 0-290 and the O-290-D2 cylinders the same ?


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