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crankshaft journal
1993 164L: The crankshaft journal for #4 cylinder (the first rod journal at the front of the crankshaft) has a groove that extends in both directions from one of the oil supply holes. It is almost as wide as the oil hole and occupies about 1/3 of the circumference. Initally I thought this groove was a journal failure and the cause of a noise I heard, however, I found this same groove on another crankshaft. Is this groove normal and not a failure of the crankshaft?
Thank You
Rick
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