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3000 Piston ID #s

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bnw

Jedi Warrior
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I need to know what the #3 stamped on top of my 63/3000 pistons stand for. Is it .030 over, or 3rd OS ie .060, or just a variation # to match with a STD. liner?
 
Sometimes a single digit is used to number the pistons to get them back in the same holes during a rebuild. If they all are stamped 3, my guess would be .030 over. Have your machine shop mike them and you'll know for sure.

Marv J
 
So, you didn't trust the answer I gave you?

Here's your proof:

IMG_8258.jpg
 
Man, I feel like a second class citizen. I don't got no diamond thingies.
 

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