The research investigates thermal management of internal combustion engine cylinder fins through This paper puts together the full computation study on geometric and material variations in reference to thermal management for internal combustion engine cylinder fins. Advanced simulation techniques with tools such as SolidWorks and Ansys Workbench get engaged to critically study fin counts, space between the fins, and thickness on an optimal heating transfer efficiency plan. This will therefore allow for general investigation of the thermal engineering parameters, namely deformation, stress, strain, and safety factors based on the application of the multi-physics boundary conditions: static, thermal, and flow analyses. Thus, the computational methodology provides general estimation of the temperature distribution along with heat flux dynamics for diverse geometries of fin and also for material compositions. The research study will investigate optimal fin configurations that enhance heat rejection performance while retaining structural integrity in extreme operational environments. Such research will provide empirical insights for engineers who can systematically explore this route for enhancing cooling efficiency and maximizing overall engine performance. The results are integrated graphically and through comparative tables, providing an all-inclusive framework for the selection of optimal fin designs in mechanical high-temperature systems.