Upon looking in the FActory service manual under the balancing of the crankshaft counterweight - it shows mounting the weight in a special bench vice and drilling holes in it to balance it.

My question is this:
Since the parts yard gave me the balancer still attached to the dampening plate and pulley and removed it from the parts car's crankshaft via the center bolt with the three washers - shouldn't that alread be balanced as long as I don't disassemble it?

Why couldn't I just remove the one on my car from the crankshaft via the center bolt and bolt the other one on there exactly as the old one was? Because if you are balancing the counterweight off the crankshaft - then the one off the old 1982 300sd parts car should be balanced and just go right onto mine.

Let me know what you think. I'm sure someone has an answer to this.

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup