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  • Howard Prout
    Experienced
    • Feb 11 2009
    • 443

    Exhaust Manifold Coating

    Has anybody had any luck in coating exhaust manifolds? I'd prefer something silverish but can live with black. I've tried everything from high temperature spray paint to chrome plating and have yet to find a satisfactory solution.
    sigpic "Old Betsy" - my '59 convertible J9YJ116209 Thunderbird Registry #33341
  • JohnG
    John
    • Jul 28 2003
    • 2341

    #2
    Howard, when I rebuilt my motor a few years ago, I tried to get this done properly. I got a natural casting colored paint from an outfit in NJ that was made for the job (http://www.hirschauto.com/prodinfo.asp?number=EMPT-PINT), sandblasted the headers, painted them and then baked them in an oven as the instructions called for. The results have been mixed. They still get some rust on them, on the one hand, and need cleaning. On the other hand the grey cast color has stayed on fine. The instructions said to use 2 coats; maybe I should have used more. But nothing flaked off, which would look poor.

    It maybe I am simply asking too much - the header is sitting there begging to rust, with its high iron content, there is alot of heat, and I am in New England so from time to time there is moisture (like the last ****ed month!).

    The headers are so small that one ought to be able to do almost anything to get the job done right.

    I am not been able to get paint to stay on the heads right near the exit to the exhaust... different problem

    john
    1958 Hardtop
    #8452 TBird Registry
    http://tbird.info/registry/DataSheet...r~equals~8452)

    photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
    history:
    http://www.squarebirds.org/users/johng/OCC.htm

    Comment

    • Guest

      #3
      Hey Guys,
      On my 1978 Diamond Jubilee Edition Thunderbird, I use stove black polish. I applied a coat, let her run and get good and hot. Let her cool off and apply another coat. I did this several times until I got them coated good. They are now kinda of a gun metal silver or gray. I have had no problem with it coming off!
      Richard D. Hord

      Comment

      • tarps3
        Super-Experienced
        • Jul 21 2003
        • 837

        #4
        I've used that stuff from Eastwood (cast iron gray color) with very good results.

        You simply brush it on.

        It's best if you can remove the manifolds and sandblast them before applying the chemical.

        Looks wonderful.
        Casey

        Comment

        • JohnG
          John
          • Jul 28 2003
          • 2341

          #5
          A year later they weren't rusty ???
          1958 Hardtop
          #8452 TBird Registry
          http://tbird.info/registry/DataSheet...r~equals~8452)

          photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
          history:
          http://www.squarebirds.org/users/johng/OCC.htm

          Comment

          • Guest

            #6
            Hey John,
            You asking me or Tarps3?

            Comment

            • JohnG
              John
              • Jul 28 2003
              • 2341

              #7
              either/both. Anyone with long term success.
              1958 Hardtop
              #8452 TBird Registry
              http://tbird.info/registry/DataSheet...r~equals~8452)

              photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
              history:
              http://www.squarebirds.org/users/johng/OCC.htm

              Comment

              • Guest

                #8
                Hey John,
                When wife gets home with camera, I will take some pictures of manifolds on Old Blue and show you the results. Remember it has been over ten years since I done it!
                As you can see, there is some rust, but once again, its been over ten years and several thousand miles. I think it held up pretty good.
                Richard D. Hord
                Attached Files
                Last edited by Guest; July 4, 2009, 05:57 PM.

                Comment

                • Coral
                  Super-Experienced

                  • Apr 3 2009
                  • 1132

                  #9
                  ...um, YEAH....LOL

                  Looks GREAT actually !

                  Comment

                  • Guest

                    #10
                    Thanks Cathie,
                    I need to get her out and do a little TLC on her. She has more sentimental value to my wife and I than anything. We started dating in this car.
                    The way people drive here at home, I'm scared to drive her very far. They drive like a bunch of idiots.
                    I get her out and drive her down the road, bring her back, wipe her off and park her.
                    Richard D. Hord

                    Comment

                    • Coral
                      Super-Experienced

                      • Apr 3 2009
                      • 1132

                      #11
                      ...awe....how sweet!
                      Last edited by Coral; July 4, 2009, 07:26 PM.

                      Comment

                      • JohnG
                        John
                        • Jul 28 2003
                        • 2341

                        #12
                        Hey Rich! Thanks for going to the trouble of the photos!
                        Yours look better after 10 years than mine did after one.

                        John
                        1958 Hardtop
                        #8452 TBird Registry
                        http://tbird.info/registry/DataSheet...r~equals~8452)

                        photo: http://www.squarebirds.org/users/joh...d_June2009.jpg
                        history:
                        http://www.squarebirds.org/users/johng/OCC.htm

                        Comment

                        • scumdog
                          Super-Experienced

                          • May 12 2006
                          • 1528

                          #13
                          Here in New Zealand there is a coating called HPC that you can get applied to your headers, manifolds etc.

                          I THINK it is some form of hi-temp powder coating (good for at least 700 degress)
                          I am getting the headers on my F100 done with HPC in a silvery - aluminium appearance, other colurs are available including cast-iron.

                          SO if it's here in NZ it has to be in the US I dare say.
                          A Thunderbirder from the Land of the Long White Cloud.

                          Comment

                          • tarps3
                            Super-Experienced
                            • Jul 21 2003
                            • 837

                            #14
                            Originally posted by JohnG
                            A year later they weren't rusty ???
                            nope - they looked really good actually.
                            I think the key is in the prep work: remove them, sandblast them thoroughly, mix the solution very well (DO NOT SHAKE THE CAN) and run them on the motor thru a couple of heating cycles to cure the solution.
                            Casey

                            Comment

                            • protourbird
                              Experienced
                              • Apr 29 2008
                              • 153

                              #15
                              Almost any powder coating firm can do the high temp coatings. The most prevalent brand name coating processes are Jet Hot and as Scumdog stated HPC. Bot came from aerospace uses from coating the impellers and rotor blades on jet engines.
                              sigpic
                              Jim

                              protourbird

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