Can anyone explain to me the process/procedure for balancing the
internal parts of an engine....pistons, rods, etc, and dynamic balancing
of the entire rotating assembly.....pistons, rods, crank, flywheel and
clutch plate. How do they do that on automotive engines? Do machine
shops literally grind a little material off the piston skirts or some
other place until the pistons match the lightest one in the bunch? Is it
similar for rods. Where is the typical location to remove material? What
considerations must be given in each case? How would one balance a
crankshaft? And where would the metal be removed? And what do you look
out for?

Years ago I used to balance cranks and aircraft propellers some. The
cranks would be put on a knife edge device and if something was not
right it would roll right over with the heavy side down. Propellers same
way. A stub shaft was mounted through the hub assembly an the whole
thing set on a knife edge. It would always rotate to heaviest side down.
In some of the propellers you would add lead wool to hollow bolts to get
the balance right, or add or remove lead washers in certain parts of the
propeller.

But i have no idea how it is done in the automotive world.

Any input would be appreciated.

Thanks,

John Rodgers
"88GL driver wannabe