Which outcome occurs when an internal combustion engine piston experiences sustained pre-ignition?

💡 Explanation

When pre-ignition occurs, combustion starts before the spark, due to hotspots like carbon deposits, causing uncontrolled pressure and temperature spikes in the cylinder, leading to piston crown melting from excessive heat. Therefore piston melting results rather than crankshaft failure, valve float, or injector clogging, each owing to distinct failure modes.

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