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Old 01-28-2012, 01:38 AM   #21
Kohnke Rebabbitting
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Default Re: Engine Oil Drain Back Tube

Quote:
Originally Posted by JC60B View Post
This is my first babbitt engine so forgive my ignorance when I ask - What is meant by peening the bearings? And how do you tell if they are or not peened? And the machine shop is measuring first to see if an align bore can be done.
J.C., you can tell lead babbitt by its dark color, tin babbitt is a white, sliver color, and a mix, has a dim color, varying on what the percentage of the Mix is.

Peening is pounding, for lack of a better word, of the babbitt when it just solid enough to get the Jig off, and it is still that hot, as when you peen cold, the babbitt will crack on the back side, next to the block.

To tell if your babbitt was peened, the babbitt left in the cap is not tight, at the shell, the top part line is straight from one end of the cap, to the other, as broke out of a mold, a peened edge, is irregular, not straight, and the anchor lugs, are naturally formed.

thanks Herm.
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