Ex. Man. Weld Coverup-Calyx? - NCRS Discussion Boards

Ex. Man. Weld Coverup-Calyx?

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  • Justin N.
    Expired
    • February 1, 2004
    • 318

    Ex. Man. Weld Coverup-Calyx?

    Dear Members,

    Just got my manifolds back from machine shop, glass bead blasted, and noticed a brass-like weld repair near bottom on one of the three threaded openings for studs. What's the best coverup for this? I thought maybe cast paint brushed over it. I want to finish them with the Calyx dressing from Eastwoods, Eckler's, etc. Has anyone used this before? I have some coming with various other paints from Eastwood. Thanks!

    Justin #41362




  • Gary S.
    Extremely Frequent Poster
    • July 31, 1992
    • 1632

    #2
    Re: Ex. Man. Weld Coverup-Calyx?

    Justin, Calyx looks good until you touch it. I have seen several manifolds with this on it and it never seems to set. Just remains tacky and comes off on your finger. This will require periodic reapplication to maintain a good appearance.
    Gary

    Comment

    • Tom S.
      Extremely Frequent Poster
      • March 1, 2004
      • 1087

      #3
      Re: Ex. Man. Weld Coverup-Calyx?

      Justin
      I think if you spray this area with Cast Blast you will be fine. I used it on my whole manifold and it worked fine. So I think just this little area wold be o.k.
      Tom

      Comment

      • Jim D.
        Extremely Frequent Poster
        • June 30, 1985
        • 2884

        #4
        Re: Ex. Man. Weld Coverup-Calyx?

        I've used both Calyx and high-temp Cast Blast. The Calyx won't cover up the repair. Calyx is basically a graphite paste and is kind of messy. I prefer Cast Blast.

        Comment

        • Timothy B.
          Extremely Frequent Poster
          • April 30, 1983
          • 5188

          #5
          Re: Ex. Man. Weld Coverup-Calyx?

          Justin,

          I just had the exhaust manifolds off the 63 and had the surfaces broached where they bolt to the cylinder heads. I glass beaded and cleaned them followed with a paint I purchased at a local speed shop called VHT (very high temperature) hi-temp nu-cast manifold coating. This product is advertised to take heat to 1500 degrees but they emphasize the curing process for maximum durability so I waited for the wife to leave and cured them in the oven. I am happy with the results as the paint matches the raw cast look of the manifolds.

          Comment

          • H S.
            Frequent User
            • August 31, 1994
            • 36

            #6
            Re: Ex. Man. Weld Coverup-Calyx?

            Justin,
            I would take a smooth flat bastard file and dress the welded area so the original shape is somewhat achieved. Then clean manifolds and paint with POR 15 manifold paint. A pint can will do about 20 manifolds, it is brushed on and the brush marks disappear when dry if you follow the instructions. I have about 20,000 miles on my DRIVER with manifolds POR painted and they look just as installed. Maybe I did something incorrect when using cast blast but after two attempts I gave up. If I knew how to post a picture I would do so.
            H P Shuttleworth 25130

            Comment

            • Clare Carpenter

              #7
              Re: Ex. Man. Weld Coverup-Calyx?

              The VHT is what Jerry MacNeish uses (you apply it yourself and cure according to direstions) after his aluminum skinning process. The aluminum skinning prevents rust permanently and the VHT provides the correct appearance. You cannot tell they've been coated and the VHT "color" is perfect.

              Comment

              • Terry F.
                Expired
                • September 30, 1992
                • 2061

                #8
                Re: Ex. Man. Weld Coverup-Calyx?

                Next time you should ask them to use nickle(?) rod. Easier to look at. That looks like they brazed it. When you put your studs in the manifold you might find that they are a little loose. That is common after you extract the studs out of an old manifold.

                You can smash the threads on two sides of the new stud (smack them on an anvil) then drive them in with locktite.

                They need to be tight and held in there because once those manifolds warm up and expand, they may want to slowly back out. It's sort of a one way ticket. let the manifold site a while and let the loctite take hold before you try to tighten the nut on it.

                Just my thoughts. Terry

                Comment

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