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Normal Wear?

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Old May 11, 2026 | 08:22 PM
  #1  
ZachAttack2001's Avatar
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From: NJ
Year: 2001
Model: Cherokee (XJ)
Engine: 4.0L
Default Normal Wear?

When I say they are new bearings, they are new bearings. I’d say less than 50 miles on them. Is this normal wear? Or is something else going on
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Old Yesterday | 05:24 AM
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exasemech's Avatar
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From: North East USA
Year: 2000
Model: Cherokee (XJ)
Engine: 4.0
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No. That's not normal wear.

Either the oil was full of metal chips or the crank journal was turned with an ax. ( and now the oil is full of metal chips.)
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Old Yesterday | 06:08 AM
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Engine: 98 stroked 4.7
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No that is not normal wear, that is shot. Many years ago (20) during my first stroker build, I did the cam break in procedures without ensuring that oil had fully saturated the bearings. Started the motor...15 to 20 sec into it with oil pressure showing on gauge , jumped up to 2000-2500 for however long was standard practice . When i drained the break in oil it was pure silver...toasted all the bearings...they looked like that. Who did the rebuild? How does the crank look?

Last edited by bluejeep2001; Yesterday at 06:14 AM.
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Old Yesterday | 08:16 AM
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Normal? Nope! What do the other ones look like?
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