Which risk increases when a crankshaft experiences torsional resonance caused by high cylinder pressures?

💡 Explanation

When high cylinder pressures induce torsional resonance in a crankshaft, cyclic twisting occurs because the excitation frequency matches a natural frequency, leading to amplified stresses at points of weakness. Therefore fatigue cracking near stress concentrators results, rather than bearing wear, piston failure or valve timing issues which occur via lubrication breakdowns, thermal overload or timing slippage respectively.

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