damper bolt

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  • rayruner
    • Apr 2010
    • 40

    #1

    damper bolt

    Can anybody tell me the size of the harmonic balancer bolt for a 3100, i'm not good with metric sizes.
  • 3400-95-Modified
    The Pink Car
    • Dec 2005
    • 4375

    #2
    I want to say it's a M12x1.25 off the top of my head but don't quote me on that yet... I can verify it when I get home and check my dampener install kit to see which stud I used.

    Got Lope?
    3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
    Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
    Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
    12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

    Comment

    • 1988GTU
      LB62LHObbqftmfw
      • Nov 2005
      • 2475

      #3
      18mm iirc.
      Lifting my front wheels, one jack at a time.

      Comment

      • caffeine
        • Jan 2012
        • 1489

        #4
        I think it's M12x1.5...
        '89 Firebird, 3500 Turbo, T56, 9-bolt/4.11
        '86 Fiero, 3500, 4-speed

        Comment

        • 3400-95-Modified
          The Pink Car
          • Dec 2005
          • 4375

          #5
          M12x1.5 has the antiseize on it so it must be that one
          Attached Files

          Got Lope?
          3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
          Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
          Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
          12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

          Comment

          • rayruner
            • Apr 2010
            • 40

            #6
            m 12x1.50

            Originally posted by 3400-95-Modified View Post
            M12x1.5 has the antiseize on it so it must be that one
            its m12x1.50, got that from the dealer. thanks

            Comment

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