Are std. size rod & main bearings Selective Fit?
04-22-2009, 09:16 PM
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Are std. size rod & main bearings Selective Fit? As the title says:
Are standard sized rod and main bearings a selective fit, like older engines?
not sure if this pertains to ls1s, but I've read:
GM likes to use what is called a selective fit bearing and they vary in size anywhere from .0001"-.0009"
The only thing you could do at that point is to have the crank reground and then buy new bearings to match which would be .010", .020", or .030"
Can i just slap in a set of std. bearings, plasti-gauge the bottom end, and call it a day?
Are standard sized rod and main bearings a selective fit, like older engines?
not sure if this pertains to ls1s, but I've read:
GM likes to use what is called a selective fit bearing and they vary in size anywhere from .0001"-.0009"
The only thing you could do at that point is to have the crank reground and then buy new bearings to match which would be .010", .020", or .030"
Can i just slap in a set of std. bearings, plasti-gauge the bottom end, and call it a day?
04-23-2009, 12:03 AM
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In my 2 years of rebuilding engines, i've probably done 200 GM engines and have never seen "Selective Bearings". When I place a crank on the lathe to be polished I mic every journal, and they are always within .0005 of spec.
BTW plasti-gauge is junk, the proper way to do it is to use a dial-bore gauge and do every journal.
I suggest that you mic the journals, and if necessary get it polished up and use some -1 bearings.
BTW plasti-gauge is junk, the proper way to do it is to use a dial-bore gauge and do every journal.
I suggest that you mic the journals, and if necessary get it polished up and use some -1 bearings.
