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1980 Chevy 305 engine and I have wanted to rebuild the motor and I have taken out the pistons to change the rings you have noticed there is a number on each piston what does that mean?
Wiki User
∙ 14y ago
It may have been rebuilt before. It's probably bore number if rotating assembly was balanced to make sure they stayed on the right journals. (weight added/removed from rods) Check to see if weight added anywhere. it could also be a quickie ring change was done & someone wanted to correspond each piston w/it's cap & not regrind crank.
Wiki User
∙ 14y ago
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