Which risk increases when hardened steel crankshaft experiences sustained torsional vibration at a resonance frequency?

💡 Explanation

When a crankshaft experiences sustained torsional vibration at a resonance frequency, metal fatigue accelerates because stress concentrations build up at micro-cracks, causing progressive crack growth. Therefore fatigue crack propagation begins, rather than oil pump cavitation, bolt deformation, or blow-by, which stem from unrelated engine problems.

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