69 master cylinder variation without bleed screws - NCRS Discussion Boards

69 master cylinder variation without bleed screws

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Manuel M.
    Expired
    • October 14, 2010
    • 34

    69 master cylinder variation without bleed screws

    Is it 110% Certain that the original Boosted Master Cylinder with Correct cast No. etc fitted to a 69 , always have the bleed screws ? Thanks Guys
  • Dick W.
    Former NCRS Director Region IV
    • June 30, 1985
    • 10483

    #2
    Re: 69 master cylinder variation without bleed screws

    Originally posted by Manuel Mylonakis (52334)
    Is it 110% Certain that the original Boosted Master Cylinder with Correct cast No. etc fitted to a 69 , always have the bleed screws ? Thanks Guys
    I guarontee ​that they came with bleeders
    Dick Whittington

    Comment

    • Joe L.
      Beyond Control Poster
      • January 31, 1988
      • 43193

      #3
      Re: 69 master cylinder variation without bleed screws

      Originally posted by Dick Whittington (8804)
      I guarontee ​that they came with bleeders
      Manual and Dick------


      ....but master cylinders with the same casting numbers after about 1972 did not have the bleeders, including those sold in SERVICE for 1967+ applications. Check for a date code on the forward brake line boss. If one is present, it will help confirm that the master cylinder is not original for a 1969.
      In Appreciation of John Hinckley

      Comment

      • Ralph S.
        Expired
        • January 31, 1985
        • 935

        #4
        Re: 69 master cylinder variation without bleed screws

        My 1973 has bleeders April 1973 car

        Comment

        • Joe L.
          Beyond Control Poster
          • January 31, 1988
          • 43193

          #5
          Re: 69 master cylinder variation without bleed screws

          Originally posted by Ralph Spears (8296)
          My 1973 has bleeders April 1973 car
          Ralph----


          I've not yet been able to confirm just when the master cylinder bleeders ended so I usually just say "after 1972". I think it was sometime in the 1973-74 period but I'm not even sure about that.
          In Appreciation of John Hinckley

          Comment

          • Manuel M.
            Expired
            • October 14, 2010
            • 34

            #6
            Re: 69 master cylinder variation without bleed screws

            Thanks for the reply guys . I have done quite abit of research on this forum and other places regarding the original master cylinder and thank you Joe for all your informative research . This is where it gets interesting as ive already checked the date code stamp in small font on the forward machined surface for the brake line . My car is an unrestored december 68 built car and the master cylinder date is spot on for the car .Ive compared the font to other ones with pics posted , and im confident it hasnt been restamped etc . Perhaps i should post up a pic . Is there a possibility there is another variation of the cylinder offered for the 69 model . the cylinder looks like its been on the car forever
            Originally posted by Joe Lucia (12484)
            Manual and Dick------


            ....but master cylinders with the same casting numbers after about 1972 did not have the bleeders, including those sold in SERVICE for 1967+ applications. Check for a date code on the forward brake line boss. If one is present, it will help confirm that the master cylinder is not original for a 1969.

            Comment

            • Joe L.
              Beyond Control Poster
              • January 31, 1988
              • 43193

              #7
              Re: 69 master cylinder variation without bleed screws

              Originally posted by Manuel Mylonakis (52334)
              Thanks for the reply guys . I have done quite abit of research on this forum and other places regarding the original master cylinder and thank you Joe for all your informative research . This is where it gets interesting as ive already checked the date code stamp in small font on the forward machined surface for the brake line . My car is an unrestored december 68 built car and the master cylinder date is spot on for the car .Ive compared the font to other ones with pics posted , and im confident it hasnt been restamped etc . Perhaps i should post up a pic . Is there a possibility there is another variation of the cylinder offered for the 69 model . the cylinder looks like its been on the car forever
              Manuel------


              I've never seen a 1967-70 known-original master cylinder that did not have bleeder valves. Whether original or not, it would not be considered typical of factory production. What is the 4 digit date code, what 2 alpha character code is stamped on the front of the master cylinder, and what is the casting number of the master cylinder?
              In Appreciation of John Hinckley

              Comment

              • Manuel M.
                Expired
                • October 14, 2010
                • 34

                #8
                Re: 69 master cylinder variation without bleed screws

                Joe ,

                the casting number is 5480346 . ive triple checked the 8 in that casting and it definately doesnt look like a 6 following other discussions on that matter . the date code stamping on the machined boss is 8292 . there is no stamping on the front . The cars build is 27th Dec 68.
                Hope this sheds some more light on the matter !!

                Comment

                • Joe L.
                  Beyond Control Poster
                  • January 31, 1988
                  • 43193

                  #9
                  Re: 69 master cylinder variation without bleed screws

                  Originally posted by Manuel Mylonakis (52334)
                  Joe ,

                  the casting number is 5480346 . ive triple checked the 8 in that casting and it definately doesnt look like a 6 following other discussions on that matter . the date code stamping on the machined boss is 8292 . there is no stamping on the front . The cars build is 27th Dec 68.
                  Hope this sheds some more light on the matter !!

                  Manuel-----


                  I absolutely assure you the third digit of the casting number is a "6".

                  The no-semi-circular-machined-surface-with-broadcast code on the front of the casting is another feature of later master cylinders, not those used in the 1967-72 period.

                  The "8292" could be the 292nd day of 1978. This master cylinder was still in production for PRODUCTION and SERVICE at that time.
                  In Appreciation of John Hinckley

                  Comment

                  • Dick W.
                    Former NCRS Director Region IV
                    • June 30, 1985
                    • 10483

                    #10
                    Re: 69 master cylinder variation without bleed screws

                    Originally posted by Manuel Mylonakis (52334)
                    Joe ,

                    the casting number is 5480346 . ive triple checked the 8 in that casting and it definately doesnt look like a 6 following other discussions on that matter . the date code stamping on the machined boss is 8292 . there is no stamping on the front . The cars build is 27th Dec 68.
                    Hope this sheds some more light on the matter !!
                    1978, 1988, 1998. I know the cylinder was still available from AC until about 2000 or so. After that I lost track.
                    Dick Whittington

                    Comment

                    • Joe L.
                      Beyond Control Poster
                      • January 31, 1988
                      • 43193

                      #11
                      Re: 69 master cylinder variation without bleed screws

                      Originally posted by Dick Whittington (8804)
                      1978, 1988, 1998. I know the cylinder was still available from AC until about 2000 or so. After that I lost track.
                      Dick-----

                      The 1-1/8" bore master cylinder is still available today from GM under GM #18009460. Earlier assembly part numbers were 5461184, 5469399, 2622249, and 18001004. However, the 18009460 is not a Moraine manufactured master cylinder and, if it ever was, has not been in quite some time. Just when the Moraine-manufactured cylinder ceased (and with it the 5460346 casting), I do not know
                      In Appreciation of John Hinckley

                      Comment

                      • Manuel M.
                        Expired
                        • October 14, 2010
                        • 34

                        #12
                        Re: 69 master cylinder variation without bleed screws

                        Ive looked at this casting number and its definately an 8 not a 6 . the 6 on the last digit has a different type of casting shape to the 8 all together . there is no doubt in my mind its a 8 unless it was a foundy stuff up on the manufacturers part and should of been a 6 . is there a possibilty there were 2 casting numbers available at the time . thanks for your replies !!!

                        Comment

                        • Dick W.
                          Former NCRS Director Region IV
                          • June 30, 1985
                          • 10483

                          #13
                          Re: 69 master cylinder variation without bleed screws

                          Originally posted by Joe Lucia (12484)
                          Dick-----

                          The 1-1/8" bore master cylinder is still available today from GM under GM #18009460. Earlier assembly part numbers were 5461184, 5469399, 2622249, and 18001004. However, the 18009460 is not a Moraine manufactured master cylinder and, if it ever was, has not been in quite some time. Just when the Moraine-manufactured cylinder ceased (and with it the 5460346 casting), I do not know
                          I know for a fact it was still on the shelves in the late '80's. I have one here I bought in the late '80's that I installed on a car I had and later replaced with a correct sleeved M/C
                          Dick Whittington

                          Comment

                          • Joe L.
                            Beyond Control Poster
                            • January 31, 1988
                            • 43193

                            #14
                            Re: 69 master cylinder variation without bleed screws

                            Originally posted by Manuel Mylonakis (52334)
                            Ive looked at this casting number and its definately an 8 not a 6 . the 6 on the last digit has a different type of casting shape to the 8 all together . there is no doubt in my mind its a 8 unless it was a foundy stuff up on the manufacturers part and should of been a 6 . is there a possibilty there were 2 casting numbers available at the time . thanks for your replies !!!

                            Manuel-----


                            Lots of folks think it's an "8". However, no part numbers (casting numbers are a part number for a casting) in the 548xxxx series were ever released by any GM division.
                            In Appreciation of John Hinckley

                            Comment

                            Working...
                            Searching...Please wait.
                            An unexpected error was returned: 'Your submission could not be processed because you have logged in since the previous page was loaded.

                            Please push the back button and reload the previous window.'
                            An unexpected error was returned: 'Your submission could not be processed because the token has expired.

                            Please push the back button and reload the previous window.'
                            An internal error has occurred and the module cannot be displayed.
                            There are no results that meet this criteria.
                            Search Result for "|||"