Finally figured out a pretty good way to remove old gasket material

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  1. Bill Crowell

    Bill Crowell Well-Known Member

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    I soak the part in naptha in my parts washer and then scrape the top, softened layer of the gasket, which comes off easily, with a single-edge razor blade scraper; but when the going gets tough (when I reach hard gasket material), I drop it back in the naptha again for a few hours. Every time you pull it out of the naptha, a bit more of the top layer of the old gasket and gasket cement is softened. I repeat this until it is completely gone. The scraping is fairly easy this way. Maybe this would work with plain old mineral spirits, too, but I haven't tried it.

    Doh! I don't know why I never thought of this before!
     
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    • TrailBeast

      TrailBeast Slightly Twisted Member

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      On that note, I get old kitchen knives from the thrift stores that have good solid handles, cut them off and grind them down into scrapers.
      That was a "why didn't I think of this before" moment.
       
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      • brian6pac

        brian6pac Well-Known Member

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        Aircraft stripper works well, brush it on the gasket and when it gets bubbling hard scrap it with a plastic scrapper
         
      • Fred Scigliano

        Fred Scigliano Well-Known Member

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        20190414_160007.jpg My gasket scraper the yellow works great on aluminum they make a green disc that is more abrasive for steel.
         
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        • famous bob

          famous bob mopar misfit

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          I use b12 chemtool in the spray can. From what the o.p. said , my way is a hell of a lot faster.
          B12 chemtool, scraper/b12/maybe scrape again/ chemtool soaked rag/ rub it off
           
        • Fred Scigliano

          Fred Scigliano Well-Known Member

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          Seen it but never tried it. I'll try it next time though.
           
        • famous bob

          famous bob mopar misfit

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          Awful hard on ur skin if used repeatedly , learned the hard way , always held part in my left hand and sray/washed parts.
          No oil in skin now , always haveing to grease my thumb and fingures !
           
        • Fred Scigliano

          Fred Scigliano Well-Known Member

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          I know what you mean been a body man for many years and always getting my hands in chemical. You think I would learn after all these years but I haven't.
           
        • 69FBCuda

          69FBCuda Life in the Fast Lane

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          Gasket remover in a spray can, works within minutes
           
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          • Krooser

            Krooser Reform School Graduate

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            Be careful with those Roloc discs as they take off metal...

            Oven cleaner works on gaskets too.
             
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            • Mattax

              Mattax Just the facts, ma'am FABO Gold Member

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              Hard lesson.
              I thought the green disks were going to be a great way to remove gasket residue.
              Final step of some project was to reinstall the right angle adapter.
              Damn thing leaked. Never had that happen before. Its a big chunk of iron, machined surfaces, nothing to warp. Figured it must be I damaged the gasket.
              Make a bunch of calls, find a place that has the gasket kit in stock! and they're not too far away - about a 1/2 hour each way if traffic is OK.
              Clean it all up good. make sure there's no oil residue, etc.
              Does it again. :BangHead:
              Now I'm really running out of time. Ive got a spare kit so not dead yet. But this time start checking the flatness of the surfaces. Sure as you know what, using the rotary gasket remover took material off the adapter and its no longer flat. Then I had to spend a whole bunch of time hand lapping it flat.:(
              Third try it sealed.
              Lesson learned.
               
            • Tooljunkie

              Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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              Naptha is not healthy.
              Prevent prolonged exposure. Acetone as well.
               
            • Fred Scigliano

              Fred Scigliano Well-Known Member

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              Never had a problem with the Roloc but you need to keep the rpm down and and hold the tool steady or your right metal will fly.
               
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