Which risk increases when an internal combustion engine experiences excessive thermal loading on its pistons?

💡 Explanation

When pistons experience excessive thermal loading, heat causes differential expansion which reduces piston-to-cylinder clearance, promoting piston ring blow-by because it impairs the ring's ability to conform; this leads to increases in oil consumption. Therefore, ring blow-by is most likely,. Crankshaft fatigue, valve float and injector fouling require altered conditions.

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