A12 Aluminum intake manifold restoration

A12 Mopar Discussions

  1. pro-streeter

    pro-streeter Well-Known Member

    My Photo Garage
    Messages:
    167
    Likes Received:
    37
    Joined:
    Jul 26, 2010
    Location:
    Spokane wa
    Local Time:
    8:32 AM
    Would like some ideas or ways to clean my Edelbrock A12 manifold. I would like to return to it natural aluminum finish. I understand painted engine color would be correct for 69 1/2 A12 cars. I have used glass bead on other manifolds with good and some cases great results. These original castings tend to have a smoother cast finish than most later versions. I will use what is needed to protect all machined surfaces whatever the method.
    Thanks in advance
     
  2. flypaper

    flypaper FBBO Gold Member FBBO Gold Member

    Messages:
    5,867
    Likes Received:
    6782
    Joined:
    Jul 17, 2008
    Location:
    ocean county,new jersey
    Local Time:
    9:32 AM
    Bead blasting aluminum is risky because the media can and will lodge in the pores. Great on steel or cast iron, not recommended on cast aluminum.
    here are a few other ways to go

    a needle scaler will work
    aluminum wheel cleaner
    Coil cleaner(the stuff you spray on AC coils before you hose them clean)
    steam pressure washer
     
    • Agree Agree x 1
    • moes

      moes Well-Known Member

      Messages:
      615
      Likes Received:
      755
      Joined:
      Dec 18, 2015
      Location:
      ONTARIO
      Local Time:
      9:32 AM
      I like to use walnut shells instead of glass beads in my blast cabinet. They dont etch the aluminum like glass beads do.
       
      • Agree Agree x 2
      • Thanks! Thanks! x 1
      • Stanton

        Stanton Well-Known Member

        Messages:
        997
        Likes Received:
        751
        Joined:
        Aug 8, 2012
        Location:
        ON
        Local Time:
        9:32 AM
        Needle scalers don't get into all the nooks and crannies AND they don't do a very good job of duplicating the original finish. In fact, I've never seen anything yet that could produce that "as cast" look. The closest I ever came was on an original unmolested max wedge crossram that was only suffering from oxidation. I gave it a very fast once over with aluminum oxide and it was the cat's ass but it still didn't glitter like a new "out of the box" Eddy intake!!
         
      • Lionized

        Lionized Well-Known Member

        My Photo Garage
        Messages:
        1,487
        Likes Received:
        884
        Joined:
        Mar 23, 2014
        Location:
        Vancouver Canada
        Local Time:
        6:32 AM
        Soda blast.
         
        • Agree Agree x 2
        • Bill Monk

          Bill Monk FBBO Gold Member FBBO Gold Member

          My Photo Garage
          Messages:
          1,290
          Likes Received:
          1209
          Joined:
          Feb 27, 2017
          Location:
          West Virginia
          Local Time:
          9:32 AM
          I cleaned mine with a stiff bristle brush and purple stuff degreaser then ran it through the dishwasher. (do not attempt this if the wife is home). I did repaint mine though but it came out great
           
          • Thanks! Thanks! x 1
          • biomedtechguy

            biomedtechguy FBBO Gold Member FBBO Gold Member

            Messages:
            9,299
            Likes Received:
            12881
            Joined:
            Mar 28, 2014
            Location:
            South Louisiana
            Local Time:
            8:32 AM
            :thumbsup:
            :rofl:
             
            • Agree Agree x 1
            • dadsbee

              dadsbee Well-Known Member

              Messages:
              522
              Likes Received:
              702
              Joined:
              Jan 29, 2018
              Location:
              Ontario, Canada
              Local Time:
              9:32 AM
              Be careful.. no she didn't catch me, but our water turned my wheel light brown... beerestoration2017 653.JPG
               
              • Like Like x 1
              • Thanks! Thanks! x 1
              • Stanton

                Stanton Well-Known Member

                Messages:
                997
                Likes Received:
                751
                Joined:
                Aug 8, 2012
                Location:
                ON
                Local Time:
                9:32 AM
                At the Detroit Autorama a few years back I was admiring a BEAUTIFUL 32 Deuce and mentioned the fact I liked all the "raw" aluminum (blower, valve covers, etc) and asked how they got it all looking the same consistent color. The owner's wife said he ran it all through the dishwasher WITH detergent. Now most soaps are Alkali so there will be a reaction with the aluminum. I didn't ask if they'd coated it afterwards but I think it would be a necessity to stop corrosion which, if you know anything about bare aluminum, occurs almost immediately.