C2 Small Block Fan Blade - NCRS Discussion Boards

C2 Small Block Fan Blade

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  • Donald H.
    Extremely Frequent Poster
    • November 1, 2009
    • 2580
    #1

    C2 Small Block Fan Blade

    I found reference to the GM part number 3770529 is still available, and I found it on the GM Parts Direct web site. This part number is referenced in the TIM&JG as being the correct blade for 66 small block and that the correct fan has an H stamped on the front and a W stamped on the back of one of the arms.

    Does anyone know of the current version sold by GM has the H and W stampings.

    Thanks,

    Don Harris
    Don Harris
    Current: 67 convertible Marina Blue L79
    Former: 60 Red/Red, 2x4, 245hp (Regional and National Top Flight 2013), 66 coupe Nassau Blue, L79 (Chapter and Regional Top Flight 2017)
    Tags: None
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    • Joe L.
      Beyond Control Poster
      • January 31, 1988
      • 43196
      #2
      Re: C2 Small Block Fan Blade

      Originally posted by Donald Harris (51003)
      I found reference to the GM part number 3770529 is still available, and I found it on the GM Parts Direct web site. This part number is referenced in the TIM&JG as being the correct blade for 66 small block and that the correct fan has an H stamped on the front and a W stamped on the back of one of the arms.

      Does anyone know of the current version sold by GM has the H and W stampings.

      Thanks,

      Don Harris
      Don-----


      I don't know if they do, or not. However, I don't see what difference it makes since the stampings cannot be seen with the fan mounted on the engine.
      In Appreciation of John Hinckley
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        • Erich C.
          Very Frequent User
          • January 30, 2007
          • 137
          #3
          Re: C2 Small Block Fan Blade

          No stampings just a painted on "H" and a painted green "dot" . See this post from 10/18/13 . I posted some photos and you can see the markings.
          https://www.forums.ncrs.org/showthread.php?102744-C1-1962-Fan-Blade-Assy
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            • Donald H.
              Extremely Frequent Poster
              • November 1, 2009
              • 2580
              #4
              Re: C2 Small Block Fan Blade

              Originally posted by Erich Cornely (46879)
              No stampings just a painted on "H" and a painted green "dot" . See this post from 10/18/13 . I posted some photos and you can see the markings.
              https://www.forums.ncrs.org/showthre...Fan-Blade-Assy
              Did yours have the W stamped into the back side of one of the blades?
              Don Harris
              Current: 67 convertible Marina Blue L79
              Former: 60 Red/Red, 2x4, 245hp (Regional and National Top Flight 2013), 66 coupe Nassau Blue, L79 (Chapter and Regional Top Flight 2017)
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                • Donald H.
                  Extremely Frequent Poster
                  • November 1, 2009
                  • 2580
                  #5
                  Re: C2 Small Block Fan Blade

                  I may just leave what I have alone. I just went out and took a couple of pictures. The first shows the backside with the W that I stamped and the second show the front with the flat rivets. Mine does match the TIM&JG description, but I'm pretty sure it is a replacement.

                  DonFan Blade 1.jpgFan Blade 2.jpg
                  Don Harris
                  Current: 67 convertible Marina Blue L79
                  Former: 60 Red/Red, 2x4, 245hp (Regional and National Top Flight 2013), 66 coupe Nassau Blue, L79 (Chapter and Regional Top Flight 2017)
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                    • Erich C.
                      Very Frequent User
                      • January 30, 2007
                      • 137
                      #6
                      Re: C2 Small Block Fan Blade

                      I just double checked the fan. There are no stampings anywhere on the fan just the painted on markings. I never had the original fan so I can't provide any info on the factory stampings.
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                        • David L.
                          Expired
                          • July 31, 1980
                          • 3310
                          #7
                          Re: C2 Small Block Fan Blade

                          My 1966 Corvette (Feb. 24, 1966) 5-blade fan (17 1/8" dia.) is stamped "H" on the front and "W" on the rear. It was attached to a Schwitzer fan clutch stamped "SC 1-26-66" (Jan. 26, 1966).

                          Dave
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