455 Crankshaft O.D./Harmonic Balancer Question

Discussion in 'Street/strip 400/430/455' started by Andrew Bond, Oct 30, 2017.

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  1. Andrew Bond

    Andrew Bond Member

    Hi guys my name is Bondy, can anyone tell me
    The crankshaft OD at the harmonic balanced end
    For a 69 Riviera 430ci
     
    Andrew Bond, Oct 30, 2017
    #1
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    The crankshaft Harmonic Balancer for all Big Block Buick engines (400-430-455) is 6.75" in diameter. It has a circumference of 21.2"
     
    LARRY70GS, Oct 30, 2017
    #2
  3. Andrew Bond

    Andrew Bond Member

    Hi Larry, I'm looking for the OD of the actual crankshaft where the harmonic balanced presses on.cheers
     
    Andrew Bond, Oct 30, 2017
    #3
  4. Andrew Bond

    Andrew Bond Member

    About 1.49 inches but I'm looking for exact OD
     
    Andrew Bond, Oct 30, 2017
    #4
  5. Andrew Bond

    Andrew Bond Member

    Factory spec, can't seem to find it anywhere
     
    Andrew Bond, Oct 30, 2017
    #5
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    It doesn't press on, it's a slip fit. I might be able to find it on the board. Let me look around.
     
    LARRY70GS, Oct 30, 2017
    #6
  7. Andrew Bond

    Andrew Bond Member

    Sorry interference fit, tap on not press on
     
    Andrew Bond, Oct 30, 2017
    #7
  8. Andrew Bond

    Andrew Bond Member

    Cheers Larry
     
    Andrew Bond, Oct 30, 2017
    #8
  9. Andrew Bond

    Andrew Bond Member

    I live in Australia. It's 3.45am here,its also extremely hard sourcing parts and info here, thanks for the help
     
    Andrew Bond, Oct 30, 2017
    #9
  10. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Can't find anything, but I would PM Jim Weise.

    http://www.v8buick.com/index.php?members/jim-weise.11/

    He builds lots of Buick engines. He will probably know off hand, and if not, he can probably mike one up right there in the shop. What exactly are you trying to do?
     
    LARRY70GS, Oct 30, 2017
    #10
  11. Andrew Bond

    Andrew Bond Member

    the harmonic balancer went on my 69 riv so i ordered another from Summit ,the only one they supplied for that vehicle ,supposedly the right one and it doesn't fit,its about
    1.3mm smaller in bore ID than the cranks hafts OD, so I'm trying to find out why
     
    Andrew Bond, Oct 30, 2017
    #11
  12. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    LARRY70GS, Oct 30, 2017
    #12
  13. flynbuick

    flynbuick Guest

    Perhaps it is for a Pontiac or Olds 455? Another potential explanation is poor machine work by a Chinese supplier.
     
    flynbuick, Oct 30, 2017
    #13
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    LARRY70GS, Oct 30, 2017
    #14
  15. Andrew Bond

    Andrew Bond Member

    Yes it was the 1st on 918400
     
    Andrew Bond, Oct 30, 2017
    #15
  16. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    OK, I believe those are not slip fit, they need to be pressed on. I suggest moving this thread to the engine forum, street/strip or Race. Jim, want to do that?
     
    LARRY70GS, Oct 30, 2017
    #16
  17. Andrew Bond

    Andrew Bond Member

    Ok
     
    Andrew Bond, Oct 30, 2017
    #17
  18. flynbuick

    flynbuick Guest

    It should now be moved to the correct section. We also enhanced the title for the O.P.
     
    flynbuick, Oct 30, 2017
    #18
  19. Andrew Bond

    Andrew Bond Member

    How do i move this conversation to the correct section
     
    Andrew Bond, Oct 30, 2017
    #19
  20. Andrew Bond

    Andrew Bond Member

    should i apply heat to the inner harmonic balancer then fit it onto the crank
     
    Andrew Bond, Oct 30, 2017
    #20
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