From: uniquemachine@air1.net
Date: Tue Sep 24 2002 - 13:42:05 PDT
They are machined as a set and when it was machined, the center
of the hole may not be on the exact parting line from the two parts.
Even if the centerline is of by a few ten thousandths of an inch, it
could be bad. Each half might not be exactly centered or exactly
180 degree half circles.
Jon
> Ok, my dumb question of the week......why do mfgs say connecting rod end
> caps must only fit one way on the connecting rod?
>
> The inside of the connecting rod is suppose to form a perfect circle, right?
> Now if the connecting rod cap is equal to 1/2 of the round bearing surface
> that wraps around the crank journal then obviously its one half a (near)
> perfect circle. Why in the world would it make any difference to have the
> c. rod end cap face one direction or the other as long as the oil holes are
> aligned from the top of the c. rod. It forms a complete circle. What am I
> missing?
>
> Is it something about balance perhaps?
>
> Thanks,
>
> Jack
>
>
>
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