What physically happens when you spin a bearing? If someone's motor seized cause it spun a bearing will it be salvageable? what physically happens?

 

dosent the bearing seize to the crank and spin out of place from the lack of oil.im probably wrong but i do know sometimes it does hurt the block.but i think ive heard of like having them machined and putting oversized bearings in or something like that but im prob wrong. just what ive always thought

 

it means is oil was low and the rodbearing spun around the crank with no oil lubing it.the crank will be no good ever again.so it means new block time.

 

waite mike.If you throw a ROD bearing the block is no good couse the crank is no good.Sorry but that doesnt make sense.I allways thought it was what alwaystootall said.

 

but once you scar the crank journals it will continue to eat every bearing you put back on it.so new crank means just get a new block.

 

i think what he means is that once you scar the journals then in order to get that fixed you either need the crank spraywelded and reground (not worth it) or get one from another car which will be a serious PITA because then you have to resize all the bearings in the bottom end because your dealing with a different block and different rods etc... or you can get another engine and not worry about it.

 

so basically Iit's a toss up? if it's a rod bearing that spun then it's not too big of a deal, but if it's a crank bearing it's fucked?

 

teh rod bearings go around the crank, between teh crank and rods , then you have main bearings that sit between the block and crank. if you "spin" a bearing, more than likely you'll need a new crank, sometimes you can get them micropolished, but just b/c you need a new crank, doesn't mean you need a new block, they're are people with busted blocks (cracked sleeves, etc.), that will sell the cranks for next to nothing.

 

get the crank machined with oversized bearings.