rod cap/bearing

Big Block A body Tech

  1. 440 Mike

    440 Mike Well-Known Member

    Messages:
    178
    Likes Received:
    54
    Joined:
    Jul 18, 2016
    Location:
    Minnesota
    Local Time:
    2:10 AM
    I'm pulling pistons out of a 400. Everything looking great until I remove a rod bearing to inspect the cap. Need some expertise on what is happening here.

    DSCN3387 (640x480).jpg

    DSCN3390 (640x480).jpg

    DSCN3388 (640x480).jpg
     
  2. Demonracer

    Demonracer 71 Demon 00 Ram 16 Chrysler 300S 05 Caravan FABO Gold Member

    Messages:
    3,932
    Likes Received:
    1847
    Joined:
    Jan 31, 2010
    Location:
    Cleveland, Texas
    Local Time:
    2:10 AM
    It looks like the rods were not resized the last time it was put together to me.
     
  3. 440 Mike

    440 Mike Well-Known Member

    Messages:
    178
    Likes Received:
    54
    Joined:
    Jul 18, 2016
    Location:
    Minnesota
    Local Time:
    2:10 AM
    What's with the copper color on the cap and rod?
     
  4. Rmoore

    Rmoore Well-Known Member

    Messages:
    449
    Likes Received:
    272
    Joined:
    Nov 14, 2018
    Location:
    Gun Barrel City, Texas
    Local Time:
    2:10 AM
    Was the bearing snug in the cap and in the rod ?? Or was the bearing really easy to takeout ??
     
  5. pishta

    pishta I know I'm right....

    Messages:
    18,675
    Likes Received:
    8135
    Joined:
    Oct 13, 2004
    Location:
    Tustin, CA
    Local Time:
    12:10 AM
    They plated the oversized rods to get them back in spec, seen whole rods that were copper. See the cross hatch hone marks> That's good to go.
     
    • Agree Agree x 3
    • Thanks! Thanks! x 1
    • 440 Mike

      440 Mike Well-Known Member

      Messages:
      178
      Likes Received:
      54
      Joined:
      Jul 18, 2016
      Location:
      Minnesota
      Local Time:
      2:10 AM
      Yes, bearing fit was very good.
       
    • 440 Mike

      440 Mike Well-Known Member

      Messages:
      178
      Likes Received:
      54
      Joined:
      Jul 18, 2016
      Location:
      Minnesota
      Local Time:
      2:10 AM
      I didn't know about the plating, but that's good news. The cross hatch does look good. Thanks!
       
    • Rmoore

      Rmoore Well-Known Member

      Messages:
      449
      Likes Received:
      272
      Joined:
      Nov 14, 2018
      Location:
      Gun Barrel City, Texas
      Local Time:
      2:10 AM
      you are good to go then Sir as Pishta has said !!
       
      • Thanks! Thanks! x 1
      • 1968rt

        1968rt Active Member

        Messages:
        34
        Likes Received:
        49
        Joined:
        Jan 2, 2008
        Local Time:
        3:10 AM
        I believe when the weight was off a bit the factory would copper plate the rods to bring them to spec. I have seen many sets like that.
         
      • my68barracuda

        my68barracuda Well-Known Member

        Messages:
        1,454
        Likes Received:
        1137
        Joined:
        Dec 6, 2009
        Location:
        Indianapolis IN
        Local Time:
        3:10 AM
        Was not an issue with the weight, the bore size was too big or out of round.
         
        • Agree Agree x 1
        • 1968rt

          1968rt Active Member

          Messages:
          34
          Likes Received:
          49
          Joined:
          Jan 2, 2008
          Local Time:
          3:10 AM
          Im just saying what I heard a long time ago. Wouldnt copper be too soft to decrease bore size? Why would the whole rod get plated?
           
        • my68barracuda

          my68barracuda Well-Known Member

          Messages:
          1,454
          Likes Received:
          1137
          Joined:
          Dec 6, 2009
          Location:
          Indianapolis IN
          Local Time:
          3:10 AM
          In plating copper sticks to steel really well. The over size or out of round condition is in the thousands, so the plating is very thin. Try peeling the copper plate off a penny, or bite into a penny, you will get the feel for how well copper sticks to steel and how hard a thin copper plate is.
          The whole rod is coated to get uniform build up, that is how electrolysis works.
           
        1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
          By continuing to use this site, you are consenting to our use of cookies.