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Engine Balance

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  • Dan White

    Engine Balance

    I plan on installing a rebuilt 350 short block in my 66 driver over christmas break. I have a few questions concerning balancing this engine. The rotating assembly is completely assembled and balanced. So, I need to add my own flywheel and balancer. I plan on using my current flywheel and clutch (the clutch was new many years ago, but only has a few hundred miles on it). Can I just bolt this clutch and flywheel assembly to the new engine, and put on a new balancer (by the way, what would be my best choice for balancers, I was thinking GM #12555879)? Or, should I have the two pieces balanced seperatly, then install them? Thanks in advance, Dan
  • Clem Z.
    Expired
    • January 1, 2006
    • 9427

    #2
    Re: Engine Balance

    i would have the flywheel balanced and then have them balance the pressure plate seperate but not as a unit in case you ever need to change the pressure plate. the damper should be fine but i would still have the shop check the balance.you will need timing pointer # 12341915 to be correct with the TDC mark on the damper.

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

      #3
      Re: Engine Balance

      Dan-----

      Use the GM #12555879 only if the pulley system that you have is for an L-79 engine. Although the 12555879 is not used with an L-79, its configuration is compatible with an L-79 pulley system.
      In Appreciation of John Hinckley

      Comment

      • Clem Z.
        Expired
        • January 1, 2006
        • 9427

        #4
        Re: Engine Balance

        if you need to check your pulley system for alignment just bend a 1/4" dia steel rod with a 90 degree bend,lay the bend in the water pump pulley and rotate it till the other end is pointing to the other pulley and see if it is in the center. you can either get water pump pulley shims if the water pump pulley is too close to the pump or if you are careful you can press the water pump pulley flange back towards the pump if you are too far forward. you must take the back cover off of the pump and support the bearing shaft from the rear to do this.

        Comment

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