67 small block oil pressure line and fitting - NCRS Discussion Boards

67 small block oil pressure line and fitting

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  • Joe R.
    Extremely Frequent Poster
    • March 1, 2002
    • 1356

    67 small block oil pressure line and fitting

    I'm trying to understand what the oil pressure line and fitting should look like on my 67 327/300.

    The attached photo shows what I have now. Note that the line seems to have been spliced and soldered where it emerges from the fitting. I have three questions that hope you experts can answer:

    1) Does the fitting itself look correct, so that all I need to replace is the line itself?

    2) I've heard that the original line was copper plated steel rather than just copper. Is this true, and if so, does anyone reproduce the correct tubing material?

    3) How does this fitting seal? Does it use a compression collar that slips over the tubing, or is it some type of flare fitting? I want to know what parts I need before I disassemble this.

    I appreciate any clarification and assistance that you folks can provide.




    Attached Files
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: 67 small block oil pressure line and fitting

    Joe-----

    1) The fitting looks correct to me;

    2) I believe the original was copper-plated steel or just natural steel. It was not copper tubing;

    3) The fitting seals with a compression-type joint using a brass ferrule.
    In Appreciation of John Hinckley

    Comment

    • Joe R.
      Extremely Frequent Poster
      • March 1, 2002
      • 1356

      #3
      Re: 67 small block oil pressure line and fitting

      Thanks Joe. I guess I could "fix" the solder joint problem by cutting the tubing and reinstalling it with a new brass ferrule. I think I will do that unless someone comes up with a source for the correct tubing material.

      Comment

      • Wayne W.
        Extremely Frequent Poster
        • April 30, 1982
        • 3605

        #4
        Re: 67 small block oil pressure line and fitting

        Those dont use a ferrule Joe. They have a special fitting that actually compresses onto the pipe. They are not re-usable as a result.

        Comment

        • Joe R.
          Extremely Frequent Poster
          • March 1, 2002
          • 1356

          #5
          Re: 67 small block oil pressure line and fitting

          Hi Wayne:

          Okay, maybe "ferrule" (Joe Lucia's term) is not the right term, but I think I know what he means. It's a small collar that slides onto the tubing and then gets compressed when you tighten the nut. Is that correct?

          I have not checked the usual parts suppliers, but I presume I can buy this part. Any suggestions for a source?

          Also, what's your opinion on the correct finish and material of the tubing?

          Comment

          • Timothy B.
            Extremely Frequent Poster
            • April 30, 1983
            • 5177

            #6
            Re: 67 small block oil pressure line and fitting

            Joe,

            The fittings and tube are available from Paragon. The adapter that screws into the block needs to be replaced because yours looks like it's for a compression fitting. Get this part from Paragon because I could not find it locally.

            Comment

            • Dwight P.
              Very Frequent User
              • June 30, 1983
              • 176

              #7
              Re: 67 small block oil pressure line and fitting

              Joe:
              I just replaced my line (65 SB) and I asume that the line and fittings are the same for your 67.
              Copper coated steel is the correct tubing. The fittings do not require any compression device...they are designed to compress onto the tube as they are tightened. The copper coated steel tubing is very difficult to find. Most suppliers sell copper lines.
              Paul Mazut is fabricating tubing and fittings. His specialty is parts for C-1's, but his oil lines and fittings will work for C-2's. His product is very close to the original except it is very slightly smaller in diameter. The original diameter was .125 and Paul's is about .115. Not sure if a judge would notice the difference. Paul's email is msolidaxle@aol.com

              DP

              Comment

              • Brian M.
                Extremely Frequent Poster
                • February 1, 1997
                • 1837

                #8
                Re: 67 small block oil pressure line and fitting

                Paragon has the copper covered steel line.

                Comment

                • Chuck R.
                  Expired
                  • April 30, 1999
                  • 1434

                  #9
                  Re: Sounds like a ferrel fitting to me Joe

                  Slips over the tube and is crimped to the tube when the nut is wound down on it into the receiving fitting.

                  But hey what do I know, I'm a C-3 guy

                  Chuckster

                  Comment

                  • John H.
                    Beyond Control Poster
                    • December 1, 1997
                    • 16513

                    #10
                    Re: 67 small block oil pressure line and fitting

                    The male and female fittings are a GM-proprietary design that doesn't use any separate compression sleeve; the sealing surfaces at both ends are radius-tapered such that when tightened, the end of the male fitting is compressed on the O.D. of the tubing. The same design was used on later cars with nylon tubing, which used a tiny brass insert inside the end of the tubing to keep it from collapsing.

                    Paragon sells a kit with the copper-plated steel tubing and GM-type fittings; the hex on the fittings is 3/8", where the original fittings had a 5/16" hex - otherwise the pieces are the same.




                    Comment

                    • Wayne W.
                      Extremely Frequent Poster
                      • April 30, 1982
                      • 3605

                      #11
                      Re: 67 small block oil pressure line and fitting

                      Here is an original.




                      Comment

                      • Joe L.
                        Beyond Control Poster
                        • February 1, 1988
                        • 43193

                        #12
                        Re: 67 small block oil pressure line and fitting

                        John-----

                        The original nylon oil line on my 1969 small block did use the tiny brass insert that you describe. However, it also used a brass ferrule. The one I have pictured is a replacement that I installed on my car many years ago, but it is a GM #3906192 line, the same as used in PRODUCTION for 68-74 small blocks. Also, the block-mounted fitting is the original and it would not work with anything but a ferruled connection.

                        I thought that the earlier lines used the same sort of connection with only the tubing material being different. However, it's been so long since I've been involved with engines using the earlier style oil pressure line that, apparently, I've forgotten what the configuration is.

                        Below and following are pictures of the oil pressure line end and the fitting.




                        Attached Files
                        In Appreciation of John Hinckley

                        Comment

                        • Joe L.
                          Beyond Control Poster
                          • February 1, 1988
                          • 43193

                          #13
                          Photo #2

                          John-----

                          Here's the original block-mounted fitting:




                          Attached Files
                          In Appreciation of John Hinckley

                          Comment

                          • Joe R.
                            Extremely Frequent Poster
                            • March 1, 2002
                            • 1356

                            #14
                            Re: 67 small block oil pressure line and fitting

                            Hi John:

                            Thanks for the explanation and the great photos. I have never seen this type of compression fitting.

                            Do you know if the diameter of the Paragon tubing is identical to the original? I have heard that it is not, but if it is different I would expect this to cause problems if used with the original fittings.

                            Was the original tubing .125 inches as Dwight Paul has stated?

                            Comment

                            • John H.
                              Beyond Control Poster
                              • December 1, 1997
                              • 16513

                              #15
                              Re: 67 small block oil pressure line and fitting

                              Joe -

                              The Paragon copper-plated steel line is .125", and I believe the original is as well; I think the only difference is the hex size on the male fitting.

                              Comment

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