Which risk increases when thermal expansion forces compress an engine crankshaft beyond the bearing clearance limits?

A)Bearing seizure from oil film collapse✓

B)Piston ring failure from excessive wear

C)Valve float from thermal deformation

D)Fuel injector clogging from vapor lock

💡 Explanation

When thermal expansion reduces crankshaft bearing clearance entirely, boundary lubrication increases because the oil film cannot be maintained, leading to direct metal-metal contact and rapid bearing seizure. Therefore, bearing seizure results, rather than piston rings, valve float, or fuel injector issues which occur from separate malfunctions.

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Which risk increases when thermal expansion forces compress an engine crankshaft beyond the bearing clearance limits?

💡 Explanation

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