1963 Gas Overflow Boot nipple - NCRS Discussion Boards

1963 Gas Overflow Boot nipple

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  • Steve E.
    Infrequent User
    • August 31, 2020
    • 25

    1963 Gas Overflow Boot nipple

    I have read that the original black hose nipple (3785142) that fits into the gas neck boot seal was a different design/size than what is being reproduced today. I searched the forum and see that this has been discussed before. The older posts that contained pictures from over 10 years ago are not displaying any of the original pictures that were posted. So, does anyone have a good picture or measurements of an original 1963 nipple.
    Thanks,
    Steve
    Last edited by Steve E.; January 6, 2024, 12:59 PM. Reason: corrected part number
  • Con X.
    Infrequent User
    • April 1, 1992
    • 23

    #2
    Re: 1963 Gas Overflow Boot nipple

    Believe this is an original 64 if that helps
    Attached Files

    Comment

    • Alan D.
      Extremely Frequent Poster
      • January 1, 2005
      • 2038

      #3
      Re: 1963 Gas Overflow Boot nipple

      Believe in 63 that was a different size! Also the spring at the end of the hose (shield 3829398) was not there.
      PN for 63 nipple 3785142 and for 63 hose 3782516 then on 9-14-62 became 3768272.
      PN for 64 nipple 3849610 and for 64 hose 3849611
      So as usual 63's are unique. Try a search on those 63 numbers

      Comment

      • Steve E.
        Infrequent User
        • August 31, 2020
        • 25

        #4
        Re: 1963 Gas Overflow Boot nipple

        Alan you are correct with the part numbers for 63 looking at the AIM Section 8 Sheet 5.00. And yes the spring is not present on 63. So, does anyone have a good picture or measurements of the correct 63 nipple 3785142. I already have the reproduction 64 and later nipple 3849610 on my car now (as shown above) so I do not need that information. When I search the forum and internet it comes up empty. That would be greatly appreciated.

        Comment

        • Alan D.
          Extremely Frequent Poster
          • January 1, 2005
          • 2038

          #5
          Re: 1963 Gas Overflow Boot nipple

          Sorry, I've run out of any more ideas - give you 63 guys a lot of credit due to all the changes on the first year C2. Perhaps try the Driveline to find any used parts.

          Comment

          • Harry S.
            Extremely Frequent Poster
            • July 31, 2002
            • 5295

            #6
            Re: 1963 Gas Overflow Boot nipple

            Con, please measure the inside diameter (ID) and post the findings.

            I just looked at my July 63 coupe. I pulled back the boot and the hose looks original, but the ID looks smaller. Best I can tell the body has never been off the frame so I may have the original nipple in the car. It's 30 degrees in the garage, so I'm not going to force, push or pull on anything 60 years old.


            Comment

            • Steve E.
              Infrequent User
              • August 31, 2020
              • 25

              #7
              Re: 1963 Gas Overflow Boot nipple

              Removed my reproduction nipple (3849610) and took measurements for reference. Also shown below is the nipple placed within the boot for reference. These are both (nipple and rubber boot) current reproduction items for 1963.
              Reproduction Fuel Overflow Nipple 3849610.jpg
              63 Reproduction Fuel nipple and boot.jpg
              Last edited by Steve E.; January 6, 2024, 04:21 PM. Reason: added additional picture

              Comment

              • Bob J.
                Very Frequent User
                • December 1, 1977
                • 714

                #8
                Re: 1963 Gas Overflow Boot nipple

                Originally posted by Steve Erickson (67288)
                I have read that the original black hose nipple (3785142) that fits into the gas neck boot seal was a different design/size than what is being reproduced today. I searched the forum and see that this has been discussed before. The older posts that contained pictures from over 10 years ago are not displaying any of the original pictures that were posted. So, does anyone have a good picture or measurements of an original 1963 nipple.
                Thanks,
                Steve
                Yes, the 1963 hose nipple was smaller than later years.
                As I remember, that nipple (63) was also listed in parts books for 62 Corvettes for the fuel cap compartment drain.
                The hose was smaller, the nipple was smaller and even the rubber boot had a different part number) and smaller hole to match the nipple.
                I'll look around to see if I have one to take a pic of.
                Bob Jorjorian

                Comment

                • Joe L.
                  Beyond Control Poster
                  • February 1, 1988
                  • 43219

                  #9
                  Re: 1963 Gas Overflow Boot nipple

                  Originally posted by Alan Drake (43261)
                  Believe in 63 that was a different size! Also the spring at the end of the hose (shield 3829398) was not there.
                  PN for 63 nipple 3785142 and for 63 hose 3782516 then on 9-14-62 became 3768272.
                  PN for 64 nipple 3849610 and for 64 hose 3849611
                  So as usual 63's are unique. Try a search on those 63 numbers
                  Alan------


                  The 1963 nipple, GM #3785142, was never available in SERVICE. The 1963-only seal (boot), GM #3829731, was once available in SERVICE but was discontinued in July, 1965 and replaced by GM #3849612, the 1964-67 seal.

                  How the 1963-only nipple and seal differ from the 1964-67, I know not.
                  In Appreciation of John Hinckley

                  Comment

                  • Harry S.
                    Extremely Frequent Poster
                    • July 31, 2002
                    • 5295

                    #10
                    Re: 1963 Gas Overflow Boot nipple

                    OK, tight in there to measure. Look like the ID is 9/32 or .281. Might be the original 63 nipple.


                    Comment

                    • Alan D.
                      Extremely Frequent Poster
                      • January 1, 2005
                      • 2038

                      #11
                      Re: 1963 Gas Overflow Boot nipple

                      OK, found a picture of the 63 v 64 nipple ( not sure where if came from )
                      Attached Files

                      Comment

                      • Bob J.
                        Very Frequent User
                        • December 1, 1977
                        • 714

                        #12
                        Re: 1963 Gas Overflow Boot nipple

                        Originally posted by Alan Drake (43261)
                        OK, found a picture of the 63 v 64 nipple ( not sure where if came from )

                        Thanks, you saved me looking!

                        Comment

                        • Harry S.
                          Extremely Frequent Poster
                          • July 31, 2002
                          • 5295

                          #13
                          Re: 1963 Gas Overflow Boot nipple

                          Bob, since Alan stole the picture from you, if you have it, can you measure the ID at the boot end?


                          Comment

                          • Bob J.
                            Very Frequent User
                            • December 1, 1977
                            • 714

                            #14
                            Re: 1963 Gas Overflow Boot nipple

                            Originally posted by Harry Sadlock (38513)
                            Bob, since Alan stole the picture from you, if you have it, can you measure the ID at the boot end?
                            Alan is a good guy......he just saved my pic, people who use it without permission have stolen it.
                            I thought I was spared looking for it.
                            I'll look but it's going to take time.
                            Lots going on in the swamp after the new year.

                            Comment

                            • Harry S.
                              Extremely Frequent Poster
                              • July 31, 2002
                              • 5295

                              #15
                              Re: 1963 Gas Overflow Boot nipple

                              Originally posted by Bob Jorjorian (1619)
                              Alan is a good guy......he just saved my pic, people who use it without permission have stolen it.
                              I thought I was spared looking for it.
                              I'll look but it's going to take time.
                              Lots going on in the swamp after the new year.
                              Yea, To the swamp!


                              Comment

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