rod bearings...oversized/undersize?
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rod bearings...oversized/undersize?
quick question. i've replaced rod bearings for the guy next door(spun #6). i've put in the stock size bearing, but there is still a little slop in the 6 and 5. he doesn't want to spend the cash in fixing it right. he's thinking of just getting rid of it in a few months, and wants a quick fix for now. he asked if i could put a bigger bearing in it. i would have to go with a undersized bearing correct? not too sure about it. 
Posting Guru
Joined: Nov 2003
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From: Homer, Alaska
If the crank journal has been turned, you will need an undersized bearing. There is a product called "plasti-guage" (not sure of the spelling) that you can use to check the bearing clearance. Or you can use a micrometer to measure the journal diameter and check that against the standard diameter. If it has "slop", it will throw a rod real fast. Don't start the engine if any rod bearing is loose.
Elder User
Joined: Feb 2003
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From: MN
Undersize bearings are needed when you turn down the crank.
Oversize bearings are needed when you line bore the mains.
Oversize/ Undersize bearings are needed when you line bore the mains and turn the crank.
Oversize bearings are needed when you line bore the mains.
Oversize/ Undersize bearings are needed when you line bore the mains and turn the crank.
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