Posted by jimg.allentown on September 01, 2018 at 07:39:24 from (108.16.40.107):
In Reply to: Re: engine rebuilding? posted by gene bender on September 01, 2018 at 06:18:02:
If you use oversize bearings, your engine will most certainly knock - and loudly! In order to standardize nomenclature, certain standard means of describing parts have been implemented for as far back as engines have been built. The size of the bearing refers to the INSIDE DIAMETER of that bearing. NOT the thickness of that bearing. Crankshafts that have been reground to a standard undersize require undersized bearings. That is why there is a standard in describing them. There have been uses of oversized bearings in applications where the inside of the connecting rod has been machined to a larger diameter.
Supposing you were rebuilding an engine, and you needed replacement bearings, the parts man would ask you if you want standard or undersized bearings. Don't take my word for it. See for yourself. Better yet, pick up an old Motor's repair manual and read it for yourself.
We can argue about this for as long as you like, but you will find that it will be a small minority that call bearings oversize and the majority will call them as they are - UNDERsize.
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