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> Value of 'dynamic' balancing when rebuilding a 7A-FE
post Dec 10, 2017 - 6:17 PM
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The crankshaft is originally balanced by the manufacturer. After 320 K miles and then suffering an extreme heat event, should the crankshaft be re-balanced during the engine overhaul? Is it worth the money? Is it necessary? Will it make me happier because of reduced engine vibrations?

Then, would a 'dynamic' balancing be even more valuable, since it would simulate the weights of the four piston assemblies being hung on the crank pins? Or, would it be unnecessary since two of the pistons are going up while the other two are going down, pretty much cancelling out their forces?

While doing a 'dynamic' balancing, is it possible to attach the fly-wheel and main crank pulley, so the entire spinning assembly is balanced as a single unit.

Both the fly-wheel and pulley show signs of having been balanced by the manufacturer. Guessing that they have not changed since the beginning of time, is it worth being concerned about them when balancing the 'system'?

Anything you know that could help me understand the process of balancing my engine during its rebuild would be appreciated. Smaay, here is where your engine building experience probably would be most useful to me.

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