Which risk increases when inadequate oil lubrication leads to adhesive wear within an engine crankshaft bearing?

💡 Explanation

When oil lubrication is inadequate in a crankshaft bearing adhesive wear increases because metal-to-metal contact causes surfaces to weld and tear apart, roughening the journal. Therefore crankshaft journal surface roughening results, rather than rod fracture, blow-by, or timing errors which involve distinct failure mechanisms.

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