What are the effects of heat on moving parts of an engine?

Heat affects moving parts of an engine by causing thermal expansion, which can lead to increased clearances between components and potentially result in reduced efficiency and performance. Excessive heat can also cause lubrication breakdown, leading to increased friction and wear, and can damage materials, resulting in deformation or failure of components. Additionally, prolonged heat exposure can contribute to the degradation of seals and gaskets, leading to leaks and further complications. Proper cooling systems are essential to mitigate these effects and ensure optimal engine performance.