Media blasting materials, k member, steering box

Mopar General Discussions

  1. Mopar Momzee

    Mopar Momzee Well-Known Member

    Messages:
    167
    Likes Received:
    88
    Joined:
    Jul 20, 2019
    Location:
    Vacaville
    Local Time:
    5:32 PM
    Want to sand blast/ media blast k member and steering box what’s the best way to get a clean product. Going to do it at home what material should be used for this process?
     
  2. Murray

    Murray FABO Gold Member FABO Gold Member

    Messages:
    2,490
    Likes Received:
    1784
    Joined:
    Apr 19, 2010
    Location:
    San Jose, California
    Local Time:
    5:32 PM
    Do you have a cabinet for blasting or will this be open-air?
     
  3. Scody21

    Scody21 Just send it

    Messages:
    610
    Likes Received:
    524
    Joined:
    Jul 17, 2019
    Location:
    Southwest Washington Coast
    Local Time:
    5:32 PM
    60-80 grit Garnet in a cabinet is best for doing all the suspension.
     
    • Like Like x 1
    • Murray

      Murray FABO Gold Member FABO Gold Member

      Messages:
      2,490
      Likes Received:
      1784
      Joined:
      Apr 19, 2010
      Location:
      San Jose, California
      Local Time:
      5:32 PM
      Clean oil and dirt from all parts first. Me= use sand on K-member (and all hard steel parts) and glass beads on your box if aluminum. Beads are more gentle on softer metals.
       
      • Like Like x 1
      • moparmat2000

        moparmat2000 FABO Gold Member FABO Gold Member

        Messages:
        19,850
        Likes Received:
        8803
        Joined:
        May 13, 2010
        Location:
        Grand Tetons
        Local Time:
        7:32 PM
        I use #3 crushed glass. Make sure to wear a respirator so you dont breathe any of it in. If doing open air use a big tarp to capture and reuse the media. This shit goes everywhere. Its messy.
         
        • Agree Agree x 1
        • mopowers

          mopowers Well-Known Member

          Messages:
          5,840
          Likes Received:
          2949
          Joined:
          Feb 15, 2006
          Location:
          West Sacramento, CA
          Local Time:
          5:32 PM
          Be careful blasting a steering box. You don't want any media getting past the seals.
           
          • Agree Agree x 2
          • CudaChick1968

            CudaChick1968 Leanna ~ The Mistress of Metal FABO Vendor

            Messages:
            10,982
            Likes Received:
            5517
            Joined:
            Jan 17, 2005
            Location:
            Greenfield, Tennessee
            Local Time:
            7:32 PM
            Degreasing everything first will help any media last longer and keep your cabinet contents from getting contaminated if you aren't doing this outside with a pot blaster. DO NOT use silica / sand without an adequate respirator system; silicosis is a nasty disease no one wants, and a wet bandana wrapped across your face is not "adequate."

            This blasting media resource thread on the GarageJournal has been going for such a long time it's almost too much info nowadays but the Search can help you find key points.

            Grainger also has a much handier chart you can print out and hang up by your blast equipment or save on your phone. (I tried to copy and paste the chart here but it's incompatible with the message board layout. Click the link and scroll down a little. It's perfect.)
             
            • Like Like x 3
            • 69 M-CODE CUDA

              69 M-CODE CUDA Well-Known Member

              Messages:
              87
              Likes Received:
              98
              Joined:
              Dec 4, 2017
              Location:
              Fitchburg, WI
              Local Time:
              7:32 PM
              When I recently refinished my K Frame, I took it to a local NAPA store that had a large oven to really clean the part. I'd heard that it's nearly impossible to remove all grease/oil doing it by hand. Total cost was $25 to bake the K Frame, and it came out perfectly clean, bare metal.
               
              • Like Like x 3
              • Agree Agree x 2
              • Murray

                Murray FABO Gold Member FABO Gold Member

                Messages:
                2,490
                Likes Received:
                1784
                Joined:
                Apr 19, 2010
                Location:
                San Jose, California
                Local Time:
                5:32 PM
                How does an oven clean a part?
                 
              • 69 M-CODE CUDA

                69 M-CODE CUDA Well-Known Member

                Messages:
                87
                Likes Received:
                98
                Joined:
                Dec 4, 2017
                Location:
                Fitchburg, WI
                Local Time:
                7:32 PM
                With heat! Seriously if you put that Kframe in at whatever temperature they use, it bakes off all oil/grease, paint, etc., without any warping or change to the metal. Looks brand spanking new when done.
                 
                • Agree Agree x 2
                • Murray

                  Murray FABO Gold Member FABO Gold Member

                  Messages:
                  2,490
                  Likes Received:
                  1784
                  Joined:
                  Apr 19, 2010
                  Location:
                  San Jose, California
                  Local Time:
                  5:32 PM
                  This is a new one for me. I'm picturing hot grease and dirt. Where does it go? How does it jump off the K-member and into the air? Sorry for being so stupid- educate me.
                   
                • 69 M-CODE CUDA

                  69 M-CODE CUDA Well-Known Member

                  Messages:
                  87
                  Likes Received:
                  98
                  Joined:
                  Dec 4, 2017
                  Location:
                  Fitchburg, WI
                  Local Time:
                  7:32 PM
                  It basically vaporizes! Think of a self-cleaning oven.
                   
                  • Agree Agree x 1
                  • Murray

                    Murray FABO Gold Member FABO Gold Member

                    Messages:
                    2,490
                    Likes Received:
                    1784
                    Joined:
                    Apr 19, 2010
                    Location:
                    San Jose, California
                    Local Time:
                    5:32 PM
                    Wow! Thanks for the info.
                     
                    • Like Like x 1
                    • CudaChick1968

                      CudaChick1968 Leanna ~ The Mistress of Metal FABO Vendor

                      Messages:
                      10,982
                      Likes Received:
                      5517
                      Joined:
                      Jan 17, 2005
                      Location:
                      Greenfield, Tennessee
                      Local Time:
                      7:32 PM
                      @Murray, these pics might help illustrate what 69 M Code is trying to explain.

                      In my industry it's called "outgassing," the process of pre-heating all parts for a longer time and at a temperature higher than that used to cure powder. What it does is bring any trapped air bubbles, impurities and chemicals in/on the metal to the surface where they can be blasted away as part of the prep work. Aluminum shows the results even more dramatically than steel does, which mainly turns a blue / purple color while any grease just turns blacker.

                      Outgassing results.jpg

                      Outgassing results 2.jpg

                      What's most telling about this particular valve cover is that it was BRAND NEW, shipped direct to me from Jeg's by my customer in Oklahoma along with an air cleaner assembly. Aluminum is very porous and absorbs all kinds of gunk, especially oils. Steel doesn't absorb as much but heating it up turns its impurities into chalky dust instead of sticky grunge. Sometimes I even get out the big propane flame thrower with a 3 foot handle to speed things along on k-members, suspension bushings, etc.
                       
                      • Thanks! Thanks! x 1
                      • diymirage

                        diymirage HP@idle > hondaHP@redline

                        Messages:
                        25,243
                        Likes Received:
                        22750
                        Joined:
                        Oct 12, 2012
                        Location:
                        michigan
                        Local Time:
                        8:32 PM
                        That's kinda hot


                        (The flame, I mean)
                         
                        • Thanks! Thanks! x 1
                        • Murray

                          Murray FABO Gold Member FABO Gold Member

                          Messages:
                          2,490
                          Likes Received:
                          1784
                          Joined:
                          Apr 19, 2010
                          Location:
                          San Jose, California
                          Local Time:
                          5:32 PM
                          This really is new to me. Thanks for the help. In the case of aluminum, are those v/covers now better prepared for polishing or better prepared for powder coating because of the high heat process ?
                           
                          • Like Like x 1
                          • CudaChick1968

                            CudaChick1968 Leanna ~ The Mistress of Metal FABO Vendor

                            Messages:
                            10,982
                            Likes Received:
                            5517
                            Joined:
                            Jan 17, 2005
                            Location:
                            Greenfield, Tennessee
                            Local Time:
                            7:32 PM
                            Yes sir. Without that crucial step, all of that grunge will actually come through the powder if it isn't removed first. Extreme cases will produce fissures in the finish you can actually see and feel, and if you examined them under a microscope it would look like miniature volcanoes. Part of the grunge that outgassed from the topside of the parts was probably factory metal polish.

                            Here's how that big spread turned out.

                            IMG_1001.JPG
                             
                            • Like Like x 1
                            • Oldiron440

                              Oldiron440 Well-Known Member

                              Messages:
                              662
                              Likes Received:
                              850
                              Joined:
                              Jan 12, 2019
                              Location:
                              North central Iowa
                              Local Time:
                              7:32 PM
                              I like silica sand and blast outside, check the k frame for cracks..
                               
                            • Mopar Momzee

                              Mopar Momzee Well-Known Member

                              Messages:
                              167
                              Likes Received:
                              88
                              Joined:
                              Jul 20, 2019
                              Location:
                              Vacaville
                              Local Time:
                              5:32 PM
                              Thanks everyone lot of info just picked op blasting cabinet from harbor freight looks like there are some mods to make.
                               
                              • Like Like x 1
                              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.