What is one consequence of overheating a piston?

Overheating a piston can cause it to expand beyond its intended dimensions, resulting in piston distortion. This distortion can lead to poor fit within the cylinder, which negatively affects the engine's ability to maintain proper compression and can create gaps that allow combustion gases to escape. Such issues can lead to increased oil consumption, unwanted noise, and ultimately, engine failure if not addressed promptly.

The other choices do not correctly reflect the consequences of overheating a piston. For instance, overheating typically leads to a decrease in fuel efficiency, as the engine struggles to maintain optimal performance. Similarly, rather than enhancing power output, overheating commonly reduces efficiency and power. Lastly, while a properly functioning piston does contribute to sealing effectiveness, overheating disrupts the shape and integrity of the piston, actually compromising rather than improving its sealing capabilities.