Captive Belt Water Pump to Crank Install - NCRS Discussion Boards

Captive Belt Water Pump to Crank Install

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  • Bob H.
    Very Frequent User
    • July 31, 2000
    • 809

    Captive Belt Water Pump to Crank Install

    My current repro belt is too loose. I am trying to get the replacement on. What is the best way to do this?
  • Mark E.
    Extremely Frequent Poster
    • April 1, 1993
    • 4542

    #2
    Re: Captive Belt Water Pump to Crank Install

    For 454, I remove the water pump pulley, reinstall it with the belt on it, then adjust the idler pulley.
    Mark Edmondson
    Dallas, Texas
    Texas Chapter

    1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
    1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top

    Comment

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

      #3
      Re: Captive Belt Water Pump to Crank Install

      Originally posted by Mark Edmondson (22468)
      For 454, I remove the water pump pulley, reinstall it with the belt on it, then adjust the idler pulley.
      This is what I did when I added a redundant belt to my '63 327/300. I don't know any other way.

      Comment

      • Bob H.
        Very Frequent User
        • July 31, 2000
        • 809

        #4
        Re: Captive Belt Water Pump to Crank Install

        I should have mentioned this is 70 LT-1. I think it should have the third belt and no idler pulley

        Comment

        • Leonard M.
          Very Frequent User
          • September 7, 2009
          • 236

          #5
          Re: Captive Belt Water Pump to Crank Install

          Use Mark Edmondsons instructions for a 454 with the exception of the idler.
          "I remove the water pump pulley, reinstall it with the belt on it" ....(unless you have P/S)

          Comment

          • Joe L.
            Beyond Control Poster
            • February 1, 1988
            • 43221

            #6
            Re: Captive Belt Water Pump to Crank Install

            Originally posted by Bob Hoffman (34576)
            I should have mentioned this is 70 LT-1. I think it should have the third belt and no idler pulley
            Bob-----

            The only 1953-82 Corvettes that were ever originally equipped with a belt idler pulley were 1963-65 with L-76/L-84 and 1968-74 big block with C-60.
            In Appreciation of John Hinckley

            Comment

            • Owen L.
              Very Frequent User
              • September 30, 1991
              • 868

              #7
              Re: Captive Belt Water Pump to Crank Install

              I take the opposite approach: leave the water pump pulley on the w/p shaft and remove the crank pulley. There's a small registration depression in the balancer that mates with the pulley and that's much easier to get the belt in a vertical position than at the top side. The problem I ran into with working the top pulley is that once it's on the shaft, you can't align the bolt holes because you can't hold the w/p stationary. No such problem with the bottom pulley.

              I've done this with both my 427 non-A/C and my 454 w/AC.

              Comment

              • Bob H.
                Very Frequent User
                • July 31, 2000
                • 809

                #8
                Re: Captive Belt Water Pump to Crank Install

                That's what I will do.

                Comment

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