Usually an engine that's been worked on has had the internals balanced
(rods,pistons, crank) prior to assembly. An external balanced engine
uses counterweights on the converter or harmonic balancer. Most of
the time... Unless the engine builder is a complete idiot (experience
from a 340 project Im working on).
Gary Hedlin
Sent from my iPhone
On Feb 27, 2010, at 8:41 PM, "Jamie Calder" <jcalder3@cfl.rr.com> wrote:
>
> How are internal rotating assemblies balanced?
> And external?
> Can a visual inspection clearly tell weather a 408 short block is
> internally or externally balanced? (got to answer some ebay q's)
>
> Thanks,
> James
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