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Thread: Identifying Piston Rings
          
   
   

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  1. #1
    H.O.Rider is offline CHR Member Visit my Photo Gallery
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    Identifying Piston Rings

     



    Iím building another small journal 327 and have come to a spot where I need some help.

    I bought a set of Wiseco forged flat top pistons from a gent that couldnít use them as his build had to go .060Ē over. They had the rings installed. I pulled them off for the obvious reasons, correct installation, end gap measurement etc.

    As of yet I canít determine the manufacturer. Hasting says not theirs due to location of the dot. Waiting to hear back from others.

    It turned out these rings have moly faces on both top and second rings.

    I bought these pistons many years ago and the gent I bought them from canít recall what brand they were. He thought they would be sealed power, TRW, or Hastings.

    As installed:

    Top ring - dot on top side, inner bevel on top side, moly face laid between two thin strips of iron.

    Second ring - no dot, inter bevel installed on top, moly is not inlaid between two strips of iron. There is iron on the face on the same edge as the bevel then moly on the rest of the face.

    And most interesting, the second ring has more tension than the top ring???

    Any insight would be appreciated

    Thanks

  2. #2
    DennyW is offline CHR Member Visit my Photo Gallery
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    Pictures would probably help quit a bit. There is about 6 or so types like that. Ring thickness on the lands, pistons you have now, would help.

  3. #3
    H.O.Rider is offline CHR Member Visit my Photo Gallery
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    Pistons are Wiseco forged flat tops.

    Ring pack is 1/16Ē, 1/16Ē, 3/16Ē

    The rings are unique to me as follows

    Ring installed in top, Iím not going to call it the top ring as I donít know for certain if it was installed correctly, was installed with an inner bevel up, a dot installed up, and it has a moly face sandwiched between a thin layer of iron at the top and bottom of the face.

    Ring installed in second has no dot. Inner bevel was installed up. The moly face starts after a thin ring of iron and extends to the bottom of the ring face.

    This is a zoomed in picture of the moly faces as installed on the piston
    Attached Images

  4. #4
    DennyW is offline CHR Member Visit my Photo Gallery
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    Last edited by DennyW; 10-06-2018 at 12:33 PM.

  5. #5
    H.O.Rider is offline CHR Member Visit my Photo Gallery
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    Iím showing the ring faces.

    Both rings have an inner bevel as installed upwards in both lands.

    Inner bevel is the same as M, PL and HC

    Ring surfaces appear to be flat and the moly is shown in the picture.Moly is much wider than any of the rings you have shown. Again, top ring has moly sandwiched between two fine strips of iron. Second ring is almost full moly faced below a thin strip of iron
    Attached Images
    Last edited by H.O.Rider; 10-06-2018 at 12:42 PM.

  6. #6
    H.O.Rider is offline CHR Member Visit my Photo Gallery
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    Picture of oil ring if that helps to determine manufacturer.
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  7. #7
    H.O.Rider is offline CHR Member Visit my Photo Gallery
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    Face of top ring looks a lot like this old TRW ad
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  8. #8
    DennyW is offline CHR Member Visit my Photo Gallery
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    Rings with a bevel on the inside diameter but no "pip" mark or dot must be installed with the bevel towards the top of the piston

    https://www.hastingsmfg.com/ServiceT...stallation.htm

    If it's a Mahle piston ring set:

    Any time there is a mark on a ring, that goes up. Bevel on the bottom on the second ring is the norm, it is a reverse torsional ring and acts like a scraper more than a compression ring.

    Last but not least:
    https://www.youtube.com/watch?v=3DcLFTQaG-I

    And, finally, this is why it is so hard to tell you:\
    https://www.youtube.com/watch?v=v2OHThPWJ6A
    Last edited by DennyW; 10-06-2018 at 07:29 PM.

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