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    1. #1
      Join Date
      Oct 2004
      Location
      Delaware, OH
      Posts
      1,379

      Harmonic balancer runout - what's acceptable?

      When I had the 454 in my Nova I noticed that the factory balancer had a little wiggle to it. I thought it was the balancer, so I picked up a Fluidampr balancer, but it did the same thing. I guess it could just be the balancer, but it's off enough to physically see the balancer move when the engines running.

      Since I'm tearing the 454 down I threw a dial indicator on the balancer to check runout. I know these aren't the correct "terms" to use but I found the "diameter runout" was 0.010" off at worst (as shown here):
      http://www.danhardison.com/454teardown/DSC02918.JPG

      "Lateral" runout was 0.015" off at worst (as shown here):.
      http://www.danhardison.com/454teardown/DSC02917.JPG

      Do these measurements seem abnornal?? I'll throw the dial indicator on the crank snout itself when I get the chance to see if it's the crank or the balancer.

      Thanks,
      Dan






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