Which part of the piston typically runs hotter during operation?

The piston head runs hotter during operation because it is directly exposed to the combustion gases and heat generated during the fuel burning process. This area absorbs a significant amount of thermal energy as it faces the combustion chamber, where temperatures can soar due to the ignition of the air-fuel mixture.

As a result, the piston head must withstand high heat levels and expand to fit snugly within the cylinder, ensuring efficient compression and combustion. The thermal dynamics of the engine dictate that the head experiences higher temperatures compared to other parts of the piston; for example, the piston skirt is designed to maintain a balance between lubrication and wear while the piston ring's primary function is sealing and not heat absorption. The piston pin connects the piston to the connecting rod and thus does not directly interact with the combustion process, leading to lower temperatures in that area as well. This understanding of the components allows engineers and technicians to effectively diagnose performance issues and improve engine designs.