1970-73 454 with C-60 Owners - NCRS Discussion Boards

1970-73 454 with C-60 Owners

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

    1970-73 454 with C-60 Owners

    I would appreciate it if any of the above referenced owners would read my 1:47 PM post to the recent thread titled "Need Help To ID This Fan Clutch Assy" by Greg Linton and check the blades of their fans with a magnet.
    In Appreciation of John Hinckley
  • James W.
    Expired
    • December 1, 1986
    • 278

    #2
    Re: 1970-73 454 with C-60 Owners

    Joe,

    My 71 (9465) had developed a crack near the base of the blade where it is riveted in. It was steel.

    Jim

    Comment

    • Bill C.
      Expired
      • July 15, 2007
      • 904

      #3
      Re: 1970-73 454 with C-60 Owners

      Joe,

      My blades are aluminum (or some other aloy) - magnet will not stick to them.

      Fan is the birth fan to my car - never changed.

      Comment

      • Bob I.
        Very Frequent User
        • November 9, 2006
        • 265

        #4
        Re: 1970-73 454 with C-60 Owners

        Joe,

        My 1970 ( #11437) fan blades, are non magnetic.

        Bob

        Comment

        • Mike M.
          NCRS Past President
          • May 31, 1974
          • 8365

          #5
          Re: 1970-73 454 with C-60 Owners

          Originally posted by Joe Lucia (12484)
          I would appreciate it if any of the above referenced owners would read my 1:47 PM post to the recent thread titled "Need Help To ID This Fan Clutch Assy" by Greg Linton and check the blades of their fans with a magnet.
          joe: will a 74 454 with c-60 do? i'
          ve got one with 20K orig milles. can go chjeck it out if it'll help ya.mike

          Comment

          • Tom L.
            Extremely Frequent Poster
            • October 17, 2006
            • 1439

            #6
            Re: 1970-73 454 with C-60 Owners

            Originally posted by Joe Lucia (12484)
            I would appreciate it if any of the above referenced owners would read my 1:47 PM post to the recent thread titled "Need Help To ID This Fan Clutch Assy" by Greg Linton and check the blades of their fans with a magnet.
            Well I guess I started this so I'll tell you how I found that the blades of my fan were aluminum. After working in the HVAC buisness for 20+ years where aluminim bladed fan blades are typical construction I became familiar with their dull metalic color and what they looked like after failure. (craking, contact with fan shrouds due to motor mount failure, etc...)

            When I bought my car, '72 454 w/ a/c early production (about 4300), the fan blades were unpainted and had that familiar dull metallic color of aluminim so I immideately assumed they were aluminum. At that point I fugured "So what".

            Here's the sad part, with the nose of the car and one inner fender removed during the body restoration an employee decided to start the car to move it. You know that nice strong steel bracket that holds the top of the radiator shroud?? The tips of my fan blade became very friendly with it. It turns out that the steel bracket was very stubborn and would not move and saw no damage, barely a mark. The blade however had that familiar look of mangled, torn aluminum that had me out on so many service calls.

            I think I can get my hands on the old fan if it helps, I didn't bring it home...bad reminders.

            Comment

            • D S.
              Extremely Frequent Poster
              • March 1, 2005
              • 1551

              #7
              Re: 1970-73 454 with C-60 Owners

              Joe Reese who stores and mechanics Don Cast's Top Flight 1972 LS-5 with AC emailed me and states:

              Don't have the car with me now to look at but if memory serves me the center is steel with aluminum blades riveted to it.

              Joe

              Comment

              • D S.
                Extremely Frequent Poster
                • March 1, 2005
                • 1551

                #8
                Re: 1970-73 454 with C-60 Owners

                My own 1970 LS-5 with AC has fan blade number 3969926 dated A70 and all blades are aluminum (or some kind of alloy) with the center support being steel. Magnet will not stick to the blades.
                I will likely be attending the Texas Regional NCRS meet in Killeen and will check out the fan blades on those that are LS-5s with AC.

                Scott Sims
                Texas Chapter

                Comment

                • Kenneth B.
                  Extremely Frequent Poster
                  • August 31, 1984
                  • 2084

                  #9
                  Re: 1970-73 454 with C-60 Owners

                  Originally posted by D Scott Sims (43568)
                  My own 1970 LS-5 with AC has fan blade number 3969926 dated A70 and all blades are aluminum (or some kind of alloy) with the center support being steel. Magnet will not stick to the blades.
                  I will likely be attending the Texas Regional NCRS meet in Killeen and will check out the fan blades on those that are LS-5s with AC.

                  Scott Sims
                  Texas Chapter
                  Same with my 70 # 7601 except mine has a B 70 date.
                  KEN BARRY
                  65 350 TI CONV 67 J56 435 CONV,67,390/AIR CONV,70 454/air CONV,
                  What A MAN WON'T SPEND TO GIVE HIS ASS A RIDE

                  Comment

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

                    #10
                    Re: 1970-73 454 with C-60 Owners

                    Originally posted by Mike McCagh (14)
                    joe: will a 74 454 with c-60 do? i'
                    ve got one with 20K orig milles. can go chjeck it out if it'll help ya.mike

                    Mike-----


                    1974 LS-4 with C-60 was supposed to use a different fan blade assembly than the GM #3992095. It should have been one without the "spiked" tips to the blades. However, I'd love to know whether yours has the "spiked" tips, or not, and, either way, if the blades attract a magnet.
                    In Appreciation of John Hinckley

                    Comment

                    • D S.
                      Extremely Frequent Poster
                      • March 1, 2005
                      • 1551

                      #11
                      Re: 1970-73 454 with C-60 Owners

                      Add two more:

                      Herschell Andrews, Houston. Top Flight 1970 LS-5 coupe with C-60: Steel center with aluminum blades.

                      Joe Blount, Houston. Top Flight 1970 LS-5 convertible with C-60: Steel center with aluminum blades.

                      Comment

                      • Mike M.
                        NCRS Past President
                        • May 31, 1974
                        • 8365

                        #12
                        Re: 1970-73 454 with C-60 Owners

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


                        1974 LS-4 with C-60 was supposed to use a different fan blade assembly than the GM #3992095. It should have been one without the "spiked" tips to the blades. However, I'd love to know whether yours has the "spiked" tips, or not, and, either way, if the blades attract a magnet.
                        joe: our 74 454 c-60 fan has notches cut on the leading edge of the tips and is magnetic. the rivets are flat headed. mike

                        Comment

                        • Edward J.
                          Extremely Frequent Poster
                          • September 15, 2008
                          • 6940

                          #13
                          Re: 1970-73 454 with C-60 Owners

                          Joe My 72 C60 Car, Fan Pt. No. 3991427 Is Aluminum
                          New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.

                          Comment

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

                            #14
                            Re: 1970-73 454 with C-60 Owners

                            Originally posted by Mike McCagh (14)
                            joe: our 74 454 c-60 fan has notches cut on the leading edge of the tips and is magnetic. the rivets are flat headed. mike
                            Mike----


                            OK, thanks. That's what I would expect. This fan is a GM #342715.
                            In Appreciation of John Hinckley

                            Comment

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

                              #15
                              Re: 1970-73 454 with C-60 Owners

                              Originally posted by Edward Johnson (49497)
                              Joe My 72 C60 Car, Fan Pt. No. 3991427 Is Aluminum
                              Edward-----



                              Well, that's apparently another fan having aluminum blades I was not aware of. The 3991427 was used for 71-73 SMALL BLOCKS with C-60. It's a 7 blade fan but without the "spike" tips. I think the blade pitch is also somewhat lesser than the big block with C-60 "spiked" tip fans.
                              In Appreciation of John Hinckley

                              Comment

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