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  #16 (permalink)  
Old 07-03-2010, 07:14 PM
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Quote:
Originally Posted by cobalt327
The problems arise when the damper is hammered on repeatedly, w/o moving the crank each time. And if the damper is hit on the outer ring, OR if the inner hub of the damper is hit w/a steel hammer.
I'[ve seen a lot of balancers with the outer edge of the bore beat in from some knuckle dragger beating on it directly, those go straight in the scrap bucket. If you had to "drive" it very hard or hit it more than a few times something was usually wrong. Nicks or dings on the crank snout, dirt, rust or grime inside the balancer bore, etc. If both are clean and smooth the balancer should "drive" on fairly easily.

The only times I ever saw a balancer come off is when some "shade tree mechanic butcher" damaged it, installed it incorrectly as in not on all the way or when extreme RPM was encountered and usually there were other factors involved including most of but not limted to the aforementioned scenarios.

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  #17 (permalink)  
Old 07-03-2010, 07:25 PM
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Through the years, I've also come across dampers along w/crank snouts that have been sanded on their ID/OD to allow them to be a slip fit- not at all what's wanted, as I'm sure you know.

If there's a way to screw it up- someone, somewhere has done it, I'm convinced!
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  #18 (permalink)  
Old 07-03-2010, 09:15 PM
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The press fit of the balancer is important. Many believe, since it has a bolt there`s no need for a tight press fit. Years ago I ordered a new balancer for my 4.3 V6. It was so tight it wouldn`t go on, so I broke out the brake hone and honed it out. I got it too big, it would go on easily with only the bolt being the installer. That lasted about 15,000 miles when the balancer bolt broke from the constant flexing, which cracked the balancer, sheered the woodruff key, and gouged out the keyway beyond repair so I had to pull the engine again and install a crank kit. So it`s important to remember, the press fit does indeed play a role. Years ago on here before many of you were around, we had the same question pop up about installing balancers, myself and many others admitted we used a block of wood and a hammer. My way used to be a 2x4 and a sledge hammer, Installed I don`t know how many this way and it never did any damage to the thrust surface. Why a 2x4? the softer wood absorbed the force better, they would break with each lick so you had to keep several on hand. We also admitted it wasn`t the right way to install them, but at least we admitted it lol.
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