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  • Helicoils

    I have an exhaust manifold with one of the two stud threads stripped. Have you had any success with drilling the manifold to install a helicoil, or is the manifold too hard to tap?
    Thanks
    PBL

  • #2
    Best thing to do is grind the stud flush to the manifold. Then drill a hole in the center of the stud for what ever size tap extractor you have Take a torch and heat the stud area then put a candle and let it melt into the area, then crank on the extractor. Unless you have already buggered up the hole.

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    • #3
      Best thing to do is grind the stud flush to the manifold. Then drill a hole in the center of the stud for what ever size tap extractor you have Take a torch and heat the stud area then put a candle and let it melt into the area, then crank on the extractor. Unless you have already buggered up the hole.

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      • #4
        The stud is not twisted off, I have it out. But when I installed the new stud, pipe and nut I noticed the stud will pull down out of the manifold. Thanks
        PBL

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        • #5
          The stud is not twisted off, I have it out. But when I installed the new stud, pipe and nut I noticed the stud will pull down out of the manifold. Thanks
          PBL

          Comment


          • #6
            The manifold is not too hard to tap(unless you have some really cheap taps).

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            • #7
              The manifold is not too hard to tap(unless you have some really cheap taps).

              Comment


              • #8
                quote:Originally posted by 00RACER

                The stud is not twisted off, I have it out. But when I installed the new stud, pipe and nut I noticed the stud will pull down out of the manifold. Thanks
                PBL
                Since you are smart enough to know what a heli coil is, you are not going to have any trouble installing one. Keep up the good work.

                Jerry Forrester
                Douglasville, Georgia
                Be sure to check out my eBay store
                http://stores.ebay.com/CHROME-CHROME-CHROME_
                for your shiny Stude stuff

                More pix of Leo the '55 Pres HT here...http://tinyurl.com/2gj6cu
                Jerry Forrester
                Forrester's Chrome
                Douglasville, Georgia

                See all of Buttercup's pictures at https://imgur.com/a/tBjGzTk

                Comment


                • #9
                  quote:Originally posted by 00RACER

                  The stud is not twisted off, I have it out. But when I installed the new stud, pipe and nut I noticed the stud will pull down out of the manifold. Thanks
                  PBL
                  Since you are smart enough to know what a heli coil is, you are not going to have any trouble installing one. Keep up the good work.

                  Jerry Forrester
                  Douglasville, Georgia
                  Be sure to check out my eBay store
                  http://stores.ebay.com/CHROME-CHROME-CHROME_
                  for your shiny Stude stuff

                  More pix of Leo the '55 Pres HT here...http://tinyurl.com/2gj6cu
                  Jerry Forrester
                  Forrester's Chrome
                  Douglasville, Georgia

                  See all of Buttercup's pictures at https://imgur.com/a/tBjGzTk

                  Comment


                  • #10
                    I thread exhaust manifolds in my shop quite often. There should be no problem to heli-coil. Just use a good quality cutting oil when tapping. Neal

                    Comment


                    • #11
                      I thread exhaust manifolds in my shop quite often. There should be no problem to heli-coil. Just use a good quality cutting oil when tapping. Neal

                      Comment

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