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Old January 12th, 2018, 07:37
trippled trippled is offline
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Join Date: Apr 2006
Location: colorado springs, co
Posts: 1,855
Re: Documenting My Crank Walk - Jeep 4.0

I have seen paint markings on factory engines.ita not uncommon. But there's also junkyards that do the same. Without seeing it's hard to see.your pics aren't working for me, it says I need permission?.

There's also the possibility that the bearing just failed because it failed. If there's not a lot of evidence of failure, like multiple failed bearings from low oil, it's totally possible the thrust bearing was defective from the get go.
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