Cylinder case casting date and engine assembly date are the same!! - NCRS Discussion Boards

Cylinder case casting date and engine assembly date are the same!!

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

    #16
    Re: Cylinder case casting date and engine assembly date are the same!!

    Originally posted by Jim Cicchini (45647)
    I've been talking to a guy about a 1966 small block with a cylinder case casting date of "F26" which translates to June 2, 1966. The engine assembly date on the stamp pad reads, F0602HT, which also partially translates to June 2. I guess anything is possible. Have any of you come across this before? It seems a little unusual to me. I haven't seen a car with a block casting date that is the same as the assembly date on the stamp pad. Thanks.

    Jim C.

    Hi Jim:

    My April 67 small block was cast and assembled on the same day. It caused Al Grenning some consternation when he first saw it, but he's fine with it now.

    The key element in understanding this was John Hinckley's explanation that the Saginaw foundry ran around the clock and a fleet of trucks ran continuously for the 45 minute drive from Saginaw to Flint. Blocks were loaded "hot" and cooled down on the drive. There was no last-in-first-out inventory system at the time, so any available block might get pulled for the Flint assembly line.

    It turns out that the screw styles used to hold the date code tag on the block's casting mold indicate whether it was cast on the first shift, second shift, or third shift. I'm away from home right now but I can post this info later if you are interested.

    The "clock-like" marking cast into the block shows what hour of the shift the casting was made.

    So, by inspecting these marks you can determine very precisely when the block was cast. These markings show that my block was cast during the first hour of the first shift on March 17. This makes it easier to understand how the engine was assembled at Flint on March 17.

    By the way, Noland Adams' C2 book contains the results of a survey he performed on casting dates and assembly dates. As I recall, about 2% of the midyear small blocks in his survey were cast and assembled on the same day.

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    • Cecil L.
      Very Frequent User
      • May 31, 1980
      • 449

      #17
      Re: Cylinder case casting date and engine assembly date are the same!!

      I had a 58 Nomad wagon a few years back, with a 348 engine that was cast on Sept 1, 1957 and the assembly date stamp was August 31. Tonawanda made mistakes too.

      Comment

      • David L.
        Expired
        • July 31, 1980
        • 3310

        #18
        Re: Cylinder case casting date and engine assembly date are the same!!

        Originally posted by Cecil Loter (3596)
        I had a 58 Nomad wagon a few years back, with a 348 engine that was cast on Sept 1, 1957 and the assembly date stamp was August 31. Tonawanda made mistakes too.
        I think that they used their time machine.

        Comment

        • John H.
          Very Frequent User
          • April 30, 1984
          • 158

          #19
          Re: Cylinder case casting date and engine assembly date are the same!!

          Check page 43 in Noland's book. My engine was cast E133 (May 13) and assembled 0514 (May 14)

          Comment

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