1960 CY (Aluminum Head) Pad - NCRS Discussion Boards

1960 CY (Aluminum Head) Pad

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  • Bob B.
    Very Frequent User
    • March 1, 2003
    • 831

    1960 CY (Aluminum Head) Pad

    Hi all,

    I recently got a 519 engine to use for restoration of my 1957 Corvette race car and the engine code is CY, which is for the 283/275 aluminum head engine that was reportedly not released. The casting date is A50. The pad date is F404CY, probably for March. This engine was a dealer replacement for a 1960 283/290 and was put in in the early 1960s, probably within the warranty period. It was rebuilt in the past and and shows light machining swirls on the pad. The font and spacings do not match what is on other pads of the period, but then there's no apparent reason for someone to have ever tried to restamp the pad. So, I wanted to see what the experts out there thought.

    Thanks,

    Bob
    Last edited by Bob B.; April 21, 2013, 10:46 AM. Reason: Clarification
  • Bob B.
    Very Frequent User
    • March 1, 2003
    • 831

    #2
    Re: 1960 CY (Aluminum Head) Pad

    Hi all,

    Here is a closeup of the date/engine code on the pad.

    Bob
    Attached Files

    Comment

    • Edward M.
      Extremely Frequent Poster
      • November 1, 1985
      • 1922

      #3
      Re: 1960 CY (Aluminum Head) Pad

      I am very skeptical about this engine stamp. If memory serves, the engine assembly date was 4 digits starting in 1960. 1957-1959 engine assembly dates were either 3 or 4 digits, depending on the month.

      A month between January and September could be represented by a single digit (1-9).

      Starting in 1960, the month was represented by 2 digits, with a leading zero for the months of January through September. So, if I have this right, this 1960 engine assembly code should be F0404CY.

      This isn't the first time restamps have missed this detail.

      The font also seems "not quite right", but I can't absolutely call it a restamp based on that.

      Just my 2 cents.

      Comment

      • Gary C.
        Administrator
        • October 1, 1982
        • 17668

        #4
        Re: 1960 CY (Aluminum Head) Pad

        Ed,

        57 to 69 were 4 digits; two for month, two for day

        You're correct - an April 4th stamp should be F0404

        Gary
        ....
        NCRS Texas Chapter
        https://www.ncrstexas.org/

        https://www.facebook.com/profile.php?id=61565408483631

        Comment

        • Edward M.
          Extremely Frequent Poster
          • November 1, 1985
          • 1922

          #5
          Re: 1960 CY (Aluminum Head) Pad

          Gary;

          I think 57-59 were 3 or 4 digits, depending on the month. As an example, a May 26, 1957 283 hp FI engine would be F526EL (no leading zero for the month). The leading zero began in 1960 (I think).

          Comment

          • Tom D.
            Extremely Frequent Poster
            • September 30, 1981
            • 2134

            #6
            Re: 1960 CY (Aluminum Head) Pad

            Could I have seen Chevrolet aluminum heads at the Chevy-Olds parts counter in Fairfield, Iowa? Pretty sure it was 1961, but not sure who made them...
            https://MichiganNCRS.org
            Michigan Chapter
            Tom Dingman

            Comment

            • Gary C.
              Administrator
              • October 1, 1982
              • 17668

              #7
              Re: 1960 CY (Aluminum Head) Pad

              Ed,

              Leading Zero begain in 1957.

              Gary
              ....
              NCRS Texas Chapter
              https://www.ncrstexas.org/

              https://www.facebook.com/profile.php?id=61565408483631

              Comment

              • Don H.
                Extremely Frequent Poster
                • December 1, 1981
                • 1487

                #8
                Re: 1960 CY (Aluminum Head) Pad

                Tom, Fairfield, Iowa??? Would that have been Bolt Chevy-Olds? (I am from that area.) Don H.

                Comment

                • Edward L.
                  Expired
                  • January 1, 1993
                  • 278

                  #9
                  Re: 1960 CY (Aluminum Head) Pad

                  Gary:

                  Ed McComas is correct, there were no leading zeroes until 1960. Ex: F304EG= March 4.

                  Ed

                  Comment

                  • Gary C.
                    Administrator
                    • October 1, 1982
                    • 17668

                    #10
                    Re: 1960 CY (Aluminum Head) Pad

                    Ed & Ed,

                    You guys are correct. Don't know what I was thinking, Not. Sorry about that. CRS.

                    Gary
                    ....
                    NCRS Texas Chapter
                    https://www.ncrstexas.org/

                    https://www.facebook.com/profile.php?id=61565408483631

                    Comment

                    • Edward M.
                      Extremely Frequent Poster
                      • November 1, 1985
                      • 1922

                      #11
                      Re: 1960 CY (Aluminum Head) Pad

                      Originally posted by Gary Chesnut (5895)
                      Ed & Ed,

                      You guys are correct. Don't know what I was thinking, Not. Sorry about that. CRS.

                      Gary
                      ....
                      No problem Gary. I know all about CRS.

                      Now, to the OP post, the date code of A 5 0 indicates January 5th, 1960 (probably). However the engine assembly date of F404CY indicates an assembly date of April 4th,
                      That is a long time between casting and assembly.

                      The OP also indicated that this engine was a dealer replacement. One theory is that the dealer stamped the engine when it was installed in the car. I have seen a number of over the counter engines that had absolutely blank pads.
                      A dealer stamping this pad would explain the format issues. Just a thought....

                      Comment

                      • Jim L.
                        Extremely Frequent Poster
                        • September 30, 1979
                        • 1808

                        #12
                        Re: 1960 CY (Aluminum Head) Pad

                        Originally posted by Edward McComas (9316)
                        A dealer stamping this pad would explain the format issues. Just a thought....
                        I'd discount the possibility of this being a dealer stamp because it is too neatly done. A dealer mechanic would have used individual letter/number stamps, each hand held. Alignment would have almost certainly been awful.

                        Jim

                        Comment

                        • Edward M.
                          Extremely Frequent Poster
                          • November 1, 1985
                          • 1922

                          #13
                          Re: 1960 CY (Aluminum Head) Pad

                          Originally posted by Jim Lockwood (2750)
                          I'd discount the possibility of this being a dealer stamp because it is too neatly done. A dealer mechanic would have used individual letter/number stamps, each hand held. Alignment would have almost certainly been awful.

                          Jim
                          I have seen dealer stampings that were pretty good, and dealer stampings that were just ugly. This one almost looks like a gang holder stamp...almost.

                          It could also be a machine shop stamping.

                          I don't think we will ever know for sure, but I do think it is safe to say that this is not a factory stamp.

                          Comment

                          • Jim L.
                            Extremely Frequent Poster
                            • September 30, 1979
                            • 1808

                            #14
                            Re: 1960 CY (Aluminum Head) Pad



                            Probably true for CY engines also.
                            Last edited by Jim L.; April 22, 2013, 01:22 PM.

                            Comment

                            • Michael H.
                              Expired
                              • January 29, 2008
                              • 7477

                              #15
                              Re: 1960 CY (Aluminum Head) Pad

                              Originally posted by Jim Lockwood (2750)


                              Probably true for CY engine also.
                              I remember this....

                              Comment

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