Chris,
The fine art of balancing.
If you are re-assembling the exact engine that came from the factory, with no
changes to the location of each piston, connecting rod, re-work of crank,
flywheel, etc., then you can get the "factory balance". But if this were true,
why was the engine disassembled to begin with?
The normal balance requires that each piston be individually weighed with
precision scales, and all of them made to be, within a very tight tolerance, the
same weight as the lightest one by machining away metal put there for that
purpose. The connecting rods are weighed, and again each must not only weigh
the same as the lightest (you cant add metal) but they are also balanced
end-for-end so the senetr of gravity is the same. That is, they all balancve at
the same distance from the end. The crankshaft is balanced dynamaically, like
your tires, by rotating it on high speed special equipment. You really can't
balance the crank without the flywheel, as part of the counterweight (28 ounces
on our years) are on the flywheel. The balancing of these items is not
expensive, and a normal part of any competent rebuilder.
Don't know who this "shop owner" is, but run, do not walk, your parts to the
nearest exit. If he can't understand this simpe concept, who knows what he'll
do the the rest of the engine.
Steve
--
Steve Laifman < One first kiss, >
B9472289 < one first love, and >
< one first win, is all >
< you get in this life. >
_/_/_/_/_/_/_/
_/ _/_/_/ _/_/_/ _/
_/ _/ _/ _/ _/ _/ _/_/_/_/
_/ _/ _/ _/ _/ _/ _/
_/_/_/_/_/__/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
_/
_/_/_/
|