Which risk increases when high cylinder pressure from early combustion stresses an engine crankshaft beyond its fatigue limit?

💡 Explanation

When high cylinder pressure exceeds the crankshaft fatigue limit, cyclical stress concentrations at stress risers cause crack propagation through metal fatigue leading to torsional fracture. Therefore, the risk of torsional fracture increases, rather than others which require different engine sub-system failure mechanisms.

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