Which risk increases when an internal combustion engine operates with excessive crankshaft torsional vibration?

💡 Explanation

When torsional vibration exceeds design limits, resonant frequencies in the crankshaft are excited, causing increased stress concentrations because of cyclic twisting, leading to metal fatigue. Therefore crankshaft fatigue failure results, rather than overheating, clogging, or blow-by, which stem from different operational issues.

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