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Author Topic:   Spun bearing
posted March 20, 2004 10:17 PM
While we were replacing the rear seal in our 350 oldsmobile purestock we thought we would go ahead and replace bearings while we had the pan off.When I pulled the middle # 4 cap off I noticed a hairline crack in the bearing that was sucked up agaist the crank.As i was attempting to pop it out it spun around and overlapped the other piece of bearing making it a job to get off.(cant believe this thing didnt spin off before now)My question is all though there is a small "nick" on the crank is the crank still salvegable can i clean it up with emory cloth and keep the new bearings in place or am I screwed and need to replace crank.Of course I still havent took off other caps and it might be worse and have a bad crank anyway.What do you guys think.....
Will keep u posted

posted March 20, 2004 10:57 PM
until you put a quality caliper on it, you wont know. the finish can be brought back, without taking too much material, but if its been wearing and lost a couple thous. it may need reground..

posted March 21, 2004 12:53 PM
If the crank is not cracked, it will need to be ground undersize. But the bigger issue will be the block. If the main bearing spun in the block, the block will need to be align-honed. Be sure to mag the main web's and the main cap first, to make sure they are not cracked before doing any work to the block.


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Rutherfordton , NC
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