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engine building tech, Harmonic Balancers.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bablazer73, Jun 15, 2001.

  1. bablazer73

    bablazer73 1/2 ton status

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    I share this because It keeps coming up as a topic of discussion in my garage all the time. I have a couple of younger friends that like to come over and talk about the "great" cars there going to build. 900 hp small blocks. One thing that always seems to baffle them is the installation of the harmonic balancer. I am getting to the point where I get pissed when one says" I'll just hammer it on" AARRGGGGGHHHHHHHHH!!. here is my explanation. On the crankshaft, there is a flange called the "thrust flange" in the bearings there is a "thrust surface". When you hammer on the end of the crankshaft, you also hammer on the trust surface. bearings are soft. you can distort the surface and I have even seen people crack the crank bashing on that new balancer. Many company's make balancer installers. I have one from snap-on. Cost me 60.00 but comes with thread adapters to do all american threaded engines and several metric engines. If you don't want to buy the tool, Just use a longer bolt and "gently" pull the balacer on. This is one of my pet peeves when building engines. Next class- excessive silicone!!

    your right. I don't understand the jeep thing!
     
  2. Wheels

    Wheels 1/2 ton status

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    Excellent point and my thoughts exactly. Is'nt $60 cheaper than a trashed out engine?
     
  3. Shawn

    Shawn 1/2 ton status Premium Member Author

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    Same here. You can really screw things up by using a hammer. A harmanoic balancer install kit should be used like this one:
    http://www.off-road.com/chevy
     
  4. HarryH3

    HarryH3 1 ton status Author

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    The proper tools and the proper use of those tools make the job easier and the repair last longer. I have no problem buying any specialty tools for any job. It's still way cheaper than paying someone else to do the job, and I'll have the right tool for the next time I need it. I love tools!!!! [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://www.angelfire.com/super/ThunderTruck>http://www.angelfire.com/super/ThunderTruck</A>
    It's a great day to be alive...
     
  5. bablazer73

    bablazer73 1/2 ton status

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    Thats the same as the snap-on I have. and it works great.

    your right. I don't understand the jeep thing!
     
  6. Blazer1970

    Blazer1970 1/2 ton status

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    You can buy an installer from Summit or Jeg's for about $20. No excuse not to have one. On the other hand, the early small blocks (265, 283) did not have a tapped hole in the front of the crankshaft. The balancer was held on by press fit only. How would you install one of those?

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison<P ID="edit"><FONT SIZE=-1>Edited by Blazer1970 on 06/15/01 09:38 AM (server time).</FONT></P>
     
  7. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    Very good point. Another reason to have a cool tool. I'm sure glad I used one. I saw my friend mess up his 2000 dollar rebuilt engine with the hammer method.

    '83 GMC Jimmy 4x4 ZZ4 Crate Motor
    '83 Chevy P/U 4x4 Sand Drag Racer, 578 RWHP
    '94 Impala SS
    '01 Chevy 2500HD w/8.1L & Allison Auto
     
  8. xnoahx

    xnoahx 1/2 ton status

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    I just propped up a long piece of wood and hit it with a BFH and was done. I called all around for the istallation tool but i couldnt find one and couldnt afford one either. What really makes me mad is that just about every store sells a puller but not an installer. What is that all about?

    Check out my 73 K5 http://members.theglobe.com/xnoahx/73k5.htm
     
  9. CaptCrunch

    CaptCrunch 1/2 ton status

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    Amen! I supose a block of wood and some careful work w/ a hammer would work, but heck if we are talking 900 hp motors (Keep dreaming kids) or even just the expense of a high class SFI approved Balancer it isn't worth mess'n around. Get the tool. I have darn near every building tool and convience tool for installation and removal I think and if I had a dollar everytime one of my buddies borrow it I'd probably have them paid for LOL [​IMG]

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <A target="_blank" HREF=http://www.geocities.com/milnerlives_2000/blazer.htm>http://www.geocities.com/milnerlives_2000/blazer.htm</A>
     

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