1. CRUZE 418

    CRUZE 418 FABO Gold Member FABO Gold Member

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    I have come across an old set of H-beam connecting rods, would like to know who the mfgr. might be. Etched number on the rod is 6123 CR. Plan to put them in my 340 build.
    Thank you
    Tried to upload a photo, keep getting an error, sorry.
     
  2. yellow rose

    yellow rose Master Of Insanity

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    Could be a bunch of different brands. There are two, maybe three companies that make that Rod in China. They just end up in boxes with different names on them.

    Verify the bolts are quality ARP bolts and not faked chinese copies, verify both ends for size and geometry and run them.
     
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    • furrystump

      furrystump Well-Known Member

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      I think the 6.123 is the length of the rod
       
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      • JBurch

        JBurch Well-Known Member

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        How old is "old"? Like YR stated make sure bolts are good, big and small ends sized correctly, have them maged. If all is good, run them.
         
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        • CRUZE 418

          CRUZE 418 FABO Gold Member FABO Gold Member

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        • CRUZE 418

          CRUZE 418 FABO Gold Member FABO Gold Member

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          Do not know how old. They do have ARP 7/16 12 point bolts. 6123 length, big end of the rod is .925. They look like they are new except for very mild surface rust. They were in an engine at least once, they had pistons attached. I planned on glass beading them for clean up. I will go back to where I found them and see if I can get more info.
          Thank you
           
        • roccodart440

          roccodart440 Well-Known Member

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          I had my last set shot peened. Wonder if you could kill 2 birds with one stone there.
           
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          • CRUZE 418

            CRUZE 418 FABO Gold Member FABO Gold Member

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            You may be right on the shot peening. Dumb me, when rechecking the rod bolts, I had missed that they have an Eagle stamped into the ARP #2000 bolts. So am thinking that they are Eagle rods.
            Thank you for all responses!
             
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            • Jadaharabi

              Jadaharabi FABO Gold Member FABO Gold Member

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            • 70aarcuda

              70aarcuda Master Hoader of SBM FABO Gold Member

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              .925 pin is a small block chevy pin size
               
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              • Duane

                Duane Well-Known Member

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                The eagle rods do not use an off the shelf arp bolt and you cannot buy replacements from arp. Arp makes them custom for eagle and you can buy new bolts directly from eagle. FYI
                 
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                • Oldiron440

                  Oldiron440 Well-Known Member

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                  If they are cheap enough upgrade the bolts.
                   
                • Duane

                  Duane Well-Known Member

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                  On an unknown set of rods I would change bolts hands down regardless of cost. Lol And do some measuring on me too.
                   
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                  • Oldiron440

                    Oldiron440 Well-Known Member

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                    I meant if the rods are cheap enough otherwise you might as well buy new.
                     
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                    • B3422w5

                      B3422w5 Well-Known Member

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                      The last place i would scrimp in a build is using used rods. To me that is an out and out no no.
                      On an Eagle rod i wouldn't even reuse the bolts. I would buy new.
                      By the time you do all that, good rods with new, unstretched bolts can be bought quite cheaply.
                      Take this very good advice i am giving you
                       
                    • 70Hardtop

                      70Hardtop Well-Known Member

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                      I agree on the rule of replacing the rod bolts, but if the rods had pistons on them and no obvious signs of hard treatment or damage, then a simple magnaflux crack test on them would be more economical than buying a new set. After they checked out fine there, if he wanted an even better set of rods than maybe even when they left the factory, he could send them to a place in Michigan called Monkey Wrench Racing who have a cryo facility and will do the rods for $75 or less. Read up on the cryo process for the still little-known process of metal stress relieving and metal grain re-aligning.

                      IMO, even with big name brands like Eagle and SCAT, they are still made in china - still made to a price and seem to be closely aligned with PCE (ProComp Electronics) who seem to make an identical rod under their own name for about 80% lower price.
                       
                    • toolmanmike

                      toolmanmike FABO MODERATOR Staff Member FABO Gold Member

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                      Your photos are too large if you are getting a error message.
                       
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