On Thu, 27 Feb 1997, Ken Brown wrote:
>
> I've always wondered how a machine shop balances an engine. Do they treat the
> crankshaft, flywheel, rods and pistons, etc as one clump of reciprocating mass
> like you would when you balance a wheel?
>
> Just wondering what you get for the $ spent,
> Ken Brown
> TR250
>
On my four-banger, the balancing and reconditioning the rods ran around
$200 (that also included resurfacing the flywheel). As I was told by the
shop, the rotating parts (crank and flywheel) are balanced in a large
machine that spins them. They then grind off metal to achieve the
balance. The rods are all brought down to the exact same weight by
grinding off metal and the same thing happens to the pistons. As far as I
know, the pistons and rods are done completely separately from the rest of
the parts.
John Paul Middlesworth
|