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Abstract: The combustion chamber of a motor cycle's engine cylinder is subjected to high temperatures and thermal strains, on which fins are attached to cool the cylinder, and fins are given on the cylinder to boost the heat transfer rate. Thermal investigation of an engine block with fins was performed in this paper. The heat dissipation inside the cylinder may be determined by doing thermal analysis on cylinder block fins. The premise of cylinder block cooling is to extend the fins across the cylinder block, increasing the heat transfer rate. The engine block fins' parametric model was created in 3D software Solidworks, and thermal analysis was performed on the fins with grooves and fins without grooves with and without the block to determine temperature variation in transient and steady states, that is, with and without considering over time. ANSYS software is used for thermal analysis. Analysis is also performed on other materials. In this thesis report, two models were produced in software, and amended designs of the same model were studied, as well as a comparison of two models based on geometry and material.