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Old 08-29-2013, 02:10 PM   #17
Ol' Ron
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Join Date: May 2010
Location: Chester Vt
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Default Re: 95% oil filtration by pass

I'd say the grub screw was left in the block. This prevented AKY oil from getting to the bearings, EXcept the rear main. This is ooiled directly from the pump.
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