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What do these bearings tell you?

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Old 10-08-2015 | 07:27 AM
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Default What do these bearings tell you?
Anything?
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Straight bottoms and flat decks
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Old 10-08-2015 | 07:50 AM
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sutphen 30
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dirt,iol thin and crank/rods clearances need to be adjusted and trued.
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Old 10-08-2015 | 08:14 AM
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What about the diagonal/ crosshatch type marks?
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Old 10-08-2015 | 08:29 AM
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scrotch biting out the poor fit.
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Old 10-08-2015 | 08:30 AM
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Someone removed bearings rubbed on them with scotch brite and reassembled.
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Old 10-08-2015 | 08:32 AM
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x 3.
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Old 10-08-2015 | 08:39 AM
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While we're at it.
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Old 10-08-2015 | 09:03 AM
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I think sutphen 30 wins the prize. I didn't want to prejudice the response but the mains in the block were about 5 thou too big (but then why were they scotchbrited?) and hadn't been aligned. We were also guessing the scotchbrite clearance job and I recently switched to a lighter weight oil. Shouldn't have been any dirt though unless it got there during assembly or debris from the damage or possibly a used oil thermostat housing that was put on.
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Old 10-08-2015 | 09:17 AM
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Originally Posted by sutphen 30
scrotch biting out the poor fit.
I have heard of people sanding a little off the back of a bearing to gain a few ten-thousandths in clearance, but to my limited knowledge it is a big no-no to sand the face of them.
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Old 10-08-2015 | 09:47 AM
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Originally Posted by bck
I think sutphen 30 wins the prize. I didn't want to prejudice the response but the mains in the block were about 5 thou too big (but then why were they scotchbrited?) and hadn't been aligned. We were also guessing the scotchbrite clearance job and I recently switched to a lighter weight oil. Shouldn't have been any dirt though unless it got there during assembly or debris from the damage or possibly a used oil thermostat housing that was put on.
If the mains in block were 0.005" to big scotch brite would make it worse.
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