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Help! Can't install harmonic balancer

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Blazer79, Feb 27, 2002.

  1. Blazer79

    Blazer79 1/2 ton status

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    Help! Can\'t install harmonic balancer

    I'm trying to install the harmonic balancer into my 454. I first sanded both surfaces and oiled everything properly. It started easily and was able to push it in with a long bolt and a few washers. As it went in further, it kept getting harder and harder, to the point that I stripped the threads on a grade 5 bolt. I got another bolt and same results. Yesterday I tried with a grade 8 bolt but it just got very hard. I estimate I'm pushing about 150-200 ft/lbs but decided to give it up before I stripped the threads of the crankshaft.

    The harm. balancer is still not fully inserted. It's just barely touching the seal on the timing chain cover. What should I do?

    Thanks.

    <font color=purple>//////
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    Soon a 454 K5!!</font color=black>
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  2. 502Burban

    502Burban 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Buy, borrow, or rent the proper tool for installing the balancer. You can usually rent one from NAPA for a few bucks. Also, make sure that the crankshaft key hasn't shifted in it's slot. I've had that happen before. You're lucky that the G5 bolt stripped, instead of the crankshaft itself. That's a much more expensive part to replace. [​IMG]

    Robb
    <a target="_blank" href=http://community.webshots.com/user/robbrj>'73 GMC Suburban - 502DFI</a>
     
  3. Blazer79

    Blazer79 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Thanks, but I don't have any Napas near by. What does that tool look like? I borrowed a special tool to remove it, but according to the book I bought about rebuilding big blocks, you just push it in by bolting the original bolt.

    <font color=purple>//////
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  4. Sparky

    Sparky 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    you sure the bolt is not botteming out inside the crank? the blancer should go on much easier than that. pull it off again and make sure everything is lineing up straight

    Sparky

    When all else fails... Check the blinker fluid.
    78 K-5
     
  5. Blazer79

    Blazer79 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Sparky:

    It did bottom out the first time I tried, so now I'm making sure by threading a longer bolt completely and then using washers to make it contact the harm balancer about 1/2" before it bottoms out.

    Also, I turned the engine to check if the balancer was not wobbling and seems perfect.

    <font color=purple>//////
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  6. Corey 78K5

    Corey 78K5 1 ton status

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    Re: Help! Can\'t install harmonic balancer

    PUt it in an oven for a few minutes. The heat will make it expand and should go on a lot better.


    Corey 78K5
    350CI, TH350, 203, Dana 44,12 Bolt, 4"lift, Shackel Flip, Sawsall and 35" BFG's
     
  7. Blazer79

    Blazer79 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Hey, I just tried that, but my microwave just exploded!!![​IMG][​IMG][​IMG] j/k

    Now, why didn't I think of that before? That's a good idea I'll try that this weekend. Is there any risk of baking the rubber ring?

    <font color=purple>//////
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  8. POWERMAD

    POWERMAD 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    I make my own balancer installatin tools.
    Get a 4" x 1/2" grade 8 bolt, run a die down to the head.
    Get a 1/2" nut and run it all the way to the head, with the balancer washer intall the the bolt into the crank.
    Then holding the bolt with a wrench run the nut down until the balancer bottoms out against the crank gear.
    That is basicly what the installation tool does.
    You use the nut to push the balancer on.

    <font color=green> Too bad ignorance isn't painful </font color=green>
     
  9. slider

    slider 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    I had the same problem. I had to hone the inside of the balancer using a brake wheel cylinder hone. I measured the dia. of the crankshaft and the dia. of the balancer and they were almost the same size. I honed the balancer until it would slip on using a instl. tool. not too loose not too tight
     
  10. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Re: Help! Can\'t install harmonic balancer

    There is a tool made for doing this job, but you can also get a block of wood and hold it against the balancer and get the BFH and drive it home. Works very well and you don't have to buy a thing, assuming you have a BFH and a block of wood.

    1989 blazer, 383 stroker, D44 / 14FF, 4.56, locked, 35 BFG mud
    Scott
     
  11. 502Burban

    502Burban 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Sorry, dude! My bad; didn't notice that you are far from NAPA at first. Here's a link to a picture of a <a target="_blank" href=http://www.autopart.com/tools/file/part73.htm>Harmonic Balancer Installation Tool</a>. You could probably make your own in a pinch. Maybe the picture will help.

    As the the block of wood and the BFH routine, you could end up causing permanent damage to the crank if you go that route. Suggest you try one of the other option mentioned if you can't make or buy a tool.

    Good luck,

    Robb
    <a target="_blank" href=http://community.webshots.com/user/robbrj>'73 GMC Suburban - 502DFI</a>
     
  12. Blazer79

    Blazer79 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    I can buy one just like this one for about $8.00, only its triangular, not circular. (Summit has it for about $95)
    <a target="_blank" href=http://store.summitracing.com/global/images/prod/norm/SUM-G1025_m.jpg>http://store.summitracing.com/global/images/prod/norm/SUM-G1025_m.jpg</a>

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  13. txbartman

    txbartman 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    Not too long ago I was in the exact same dilemma. I did damage the threads of my crank, but luckily was able to tap them back out again. There is a that makes very quick and easy work of it. You can get it from <a target="_blank" href=http://www.summitracing.com>Summit Racing for about $45. While you can try one of the other methods mentioned above, I firmly believe in the "righ tool for the job" philosophy. Sure, you could bake your balancer, but what kind of damage might you do to the rubber ring? Yeah, you could use a BFH, but what about the damage you may be doing to the bearings by pounding on the end of the crank?

    With the installer tool, it took me less than 2 minutes with NO DAMAGE ANYWHERE or ILL EFFECTS to install my balancer. How much money do you have invested in the engine? Is $50 for a tool really where you should cut corners? Just my .02.

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  14. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    Re: Help! Can\'t install harmonic balancer

    AMEN!

    John

    <font color=blue>"When all else fails, read the instructions, or get a bigger hammer"</font color=blue>
     

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