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Painting a cast iron exhaust manifold

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  • Painting a cast iron exhaust manifold

    Any one have any good recommended paint & preparation methods for re-finishing a cast iron exhaust manifold.

    I needed to the the old herald manifold off as the studs were stripped, causing the exhaust to blow. Whilst I have it off, I thought it deserved a lick of paint.

    Don't want something that will last 5 minutes !

    Any suggestions welcome !
    Triumph Herald 1200 based Roadster
    Bought in 1983 as a running restoration

  • #2
    Re: Painting a cast iron exhaust manifold

    Mornin' Richard - I don't know about High temperature primers but in the past I've found High Temp paint
    spray cans (use several coats) to be quite effective direct onto a degreased (use cellulose thinners or meths) surface

    For longevity the finish needs to "cook off" and the instructions for this are on the cans

    Comment


    • #3
      Re: Painting a cast iron exhaust manifold

      In my experience the only coating that has any longevity on a cast iron manifold is rust.
      Paul

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      • #4
        Re: Painting a cast iron exhaust manifold

        Thanks for your suggestions Dave and Paul, I eventually went for Paul’s option. I couldn’t stand the car being off the road another week !

        The old studs refused to come out, so they had to be drilled, holes re-tapped and new studs.. test drive later !
        Triumph Herald 1200 based Roadster
        Bought in 1983 as a running restoration

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        • #5
          Re: Painting a cast iron exhaust manifold

          Hi

          My mate with his 1965 e-type jag has used this and still looked good after the drive to Le Mans Classic and back via Calaise.

          Rustoleum 1078-7778-1015-7715 High Temp Black-Aluminium(1).pdf


          Originally posted by dcunn View Post
          Mornin' Richard - I don't know about High temperature primers but in the past I've found High Temp paint
          spray cans (use several coats) to be quite effective direct onto a degreased (use cellulose thinners or meths) surface

          For longevity the finish needs to "cook off" and the instructions for this are on the cans

          Comment


          • #6
            Re: Painting a cast iron exhaust manifold

            Just to prove I wasn’t being flippant I got this from Wikipedia “As with other metals, like aluminium, a tightly adhering oxide coating, a passivation layer, protects the bulk iron from further oxidation.”
            Paul

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