3959512 Block ID? - NCRS Discussion Boards

3959512 Block ID?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Dan M.
    Expired
    • October 6, 2008
    • 18

    3959512 Block ID?

    Can anyone tell me what this block is? Date code is A 22 7. Thanks. Dan
  • Dick W.
    Former NCRS Director Region IV
    • June 30, 1985
    • 10483

    #2
    Re: 3959512 Block ID?

    Discussed extensively in this thread https://www.forums.ncrs.org/showthre...59512&uid=8988
    Dick Whittington

    Comment

    • Thomas H.
      Expired
      • January 1, 1996
      • 27

      #3
      Re: 3959512 Block ID?

      When did they stop making the 3959512 block? Thanks Tom

      Comment

      • Joe L.
        Beyond Control Poster
        • February 1, 1988
        • 43202

        #4
        Re: 3959512 Block ID?

        Originally posted by Thomas Heffernan (27081)
        When did they stop making the 3959512 block? Thanks Tom
        Tom-----

        I don't know, for sure. However, the block that Dan has answers part of the question. I'm virtually certain the block had not been manufactured or released as early as 1967. So, the "7" in the date code must represent 1977, which means it was still being manufactured by 1977.

        I have some other information that indicates the 3959512 block went out-of-production sometime in the 1979-81 time period. I believe the last partial SERVICE engine assembly to use it, GM #3970134, was discontinued without supercession in October, 1982.
        In Appreciation of John Hinckley

        Comment

        • Thomas H.
          Expired
          • January 1, 1996
          • 27

          #5
          Re: 3959512 Block ID?

          Joe,
          Thanks for the help.I read on one of the forums that Chevy stopped making this block in 73-74. I bought a 3959512 on craigslist.
          Pad CE0A30525
          Casting Date B 12 0


          Is this block a 1970 or a 1980 block?
          Thank you for all your help
          Tom Heffernan

          Comment

          • Joe L.
            Beyond Control Poster
            • February 1, 1988
            • 43202

            #6
            Re: 3959512 Block ID?

            Originally posted by Thomas Heffernan (27081)
            Joe,
            Thanks for the help.I read on one of the forums that Chevy stopped making this block in 73-74. I bought a 3959512 on craigslist.
            Pad CE0A30525
            Casting Date B 12 0


            Is this block a 1970 or a 1980 block?
            Thank you for all your help
            Tom Heffernan
            Tom-----


            It could be either. However, I would strongly suspect it's 1970. For one thing, I don't think the CE stampings were still being used as late as 1980.
            In Appreciation of John Hinckley

            Comment

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

              #7
              Re: 3959512 Block ID?

              Originally posted by Thomas Heffernan (27081)
              I bought a 3959512 on craigslist.
              Pad CE0A30525
              Casting Date B 12 0


              Is this block a 1970 or a 1980 block?
              Tom -

              You might check the starter mounting pad - many "CE" blocks had a date code stamped on that machined surface (sample in photo below), which most folks never look at.
              Attached Files

              Comment

              • Thomas H.
                Expired
                • January 1, 1996
                • 27

                #8
                Re: 3959512 Block ID?

                John,
                Checked the starter mounting pad 03 70 V
                Thank you sir for All your help
                Tom Heffernan

                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 "|||"