Reusing rod bolts on a tight schedule.

Small Block Mopar Engine

  1. alpha13

    alpha13 Well-Known Member

    Messages:
    373
    Likes Received:
    15
    Joined:
    Jan 31, 2015
    Location:
    Iowa
    Local Time:
    2:45 AM
    So I am on a stupid tight schedule, like a couple days. Long story short, has anyone reused rod bolts on a stock 360? In a perfect world I know to replace them. But on a build that needs done in a few days can i get by with reusing the stock bolts? Any tips? I understand the consequences of my actions lol. Engine is going in a pickup. No hot rodding.
     
  2. skrews

    skrews Well-Known Member

    Messages:
    1,581
    Likes Received:
    1152
    Joined:
    Jul 20, 2012
    Location:
    Washington state
    Local Time:
    12:45 AM
    In a stock low rev motor I wouldn't bat an eye about the bolts. How out of round the rods are is the real question.
     
    • Agree Agree x 4
    • RustyRatRod

      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

      Messages:
      70,700
      Likes Received:
      45570
      Joined:
      Jun 7, 2010
      Location:
      Georgia
      Local Time:
      3:45 AM
      Yup, done it a lot of times in most every make engine. Rev hell out of it. If they break they break.
       
      • Agree Agree x 5
      • Like Like x 2
      • krazykuda

        krazykuda Well-Known Member FABO Gold Member How-To Section Editor

        Messages:
        58,321
        Likes Received:
        23936
        Joined:
        Aug 20, 2007
        Location:
        Orland Park, IL
        Local Time:
        2:45 AM
        If the engine has never been apart, then you may be able to get away with reusing the rod bolts...

        They should not be tightened more than 5 times, or I would recommend replacing them... After 5 clamp cycles they can get stretched too much and weaken... If you use plastic gauge, then only do it once, not many times... Small cost compared to a thrown rod...
         
        • Like Like x 2
        • JBurch

          JBurch FABO Gold Member FABO Gold Member

          Messages:
          1,907
          Likes Received:
          1064
          Joined:
          Oct 17, 2009
          Location:
          Owego, NY
          Local Time:
          3:45 AM
          I've reused rod bolts lots of times and not had a problem; have the big ends checked for size, size IF needed and go
           
          • Like Like x 1
          • Hellrats

            Hellrats Just another dumbass FABO Gold Member

            Messages:
            1,424
            Likes Received:
            1146
            Joined:
            Jan 24, 2012
            Location:
            N.E. Ohio
            Local Time:
            3:45 AM
            In a pickup truck... hell yea. Reuse them :thumbsup:
             
            • Like Like x 1
            • moper

              moper FABO Gold Member FABO Gold Member

              Messages:
              15,919
              Likes Received:
              2033
              Joined:
              Dec 27, 2004
              Location:
              eastern CT
              Local Time:
              8:45 AM
              Careful not to overtorque them but I'd have no trouble reusing them.
               
              • Like Like x 1
              • MrJLR

                MrJLR Built, not bought FABO Gold Member

                Messages:
                5,107
                Likes Received:
                5367
                Joined:
                May 14, 2015
                Location:
                Chino, California
                Local Time:
                12:45 AM
                You can lift an engine by the 1/4-20 carb screws....
                Bolts are much stronger than most people think.

                Jeff
                 
                • Like Like x 1
                • 66fs

                  66fs FABO Gold Member FABO Gold Member

                  Messages:
                  5,501
                  Likes Received:
                  2068
                  Joined:
                  Sep 9, 2009
                  Location:
                  Greenwood, South Carolina
                  Local Time:
                  3:45 AM
                  They are 5/16 fine thread, But I agree with you.
                   
                  • Thanks! Thanks! x 1
                  • nm9stheham

                    nm9stheham Well-Known Member

                    Messages:
                    12,090
                    Likes Received:
                    3954
                    Joined:
                    Dec 20, 2013
                    Location:
                    Waynesboro, VA
                    Local Time:
                    3:45 AM
                    Which blows my mind visually, despite the strength predictions saying it is fine LOL.

                    Ditto with others; I've re-used rod bolts many many times, and a lot when racing 4 bangers.
                     
                    • Like Like x 1
                    • JBurch

                      JBurch FABO Gold Member FABO Gold Member

                      Messages:
                      1,907
                      Likes Received:
                      1064
                      Joined:
                      Oct 17, 2009
                      Location:
                      Owego, NY
                      Local Time:
                      3:45 AM
                      Something else to think about....................in the section of a FSM that deals with overhauling an engine, from a 6 banger to a Hemi, I've not ever read anything that they recommend replacing rod bolts as a must do
                       
                      • Thanks! Thanks! x 1
                      • Agree Agree x 1
                      • volunteer

                        volunteer Well-Known Member

                        Messages:
                        101
                        Likes Received:
                        50
                        Joined:
                        Jun 20, 2018
                        Location:
                        British Columbia
                        Local Time:
                        12:45 AM
                        I agree - 'spun bearings' more common than rod bolt failure. Suggest replace nuts though (the ones threaded on bolts) :canada:
                         
                      • Grunchy

                        Grunchy Member

                        Messages:
                        12
                        Likes Received:
                        5
                        Joined:
                        Apr 5, 2016
                        Location:
                        Calgary, Alberta
                        Local Time:
                        1:45 AM
                        My personal experience, my dad reused rod bolts overhauling an outboard. They didn’t take too long to break (outboards run hard).
                        Bolts are strong, but rod bolts are subject to endless cyclic loading, so they are prone to suffer fatigue fracture. I’d get them magnafluxed if at all possible.
                         
                      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.