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#5
01-04-2021, 07:15 AM
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A lot of those 326 , 389 and 421 motors have piston / ring failures which make for bad blow by.
I have had 2 different 389 motors that had broken out the ring lands between the top and second compression ring. If that's the case with yours then it rebuild time not only due to the broken piston, but if the motor was run even a little with Antifreeze in it then it's going to need bearings also!
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