The Engine Cylinder block is the structure that contains the cylinders, and connecting rods of pistons of an internal combustion engine. The engine block consisted of just the cylinder block, to which a separate crankcase was attached. Engine blocks often also include elements such as coolant passages and oil galleries. Many names such as "cylinder block" or simply “Engine Block” are also known by the engine block. Any modern engine block (which has multiple cylinders in a single component block) would be classified as a monobloc. A cylinder block contains the cylinder, cylinder sleeves, coolant passages, and some space. At the starting of internal combustion engine development, cylinders were cast individually, so cylinder blocks were produced individually for each cylinder. With an increase in mass-production and technology, engine manufacturers combined two or three cylinders into a single-cylinder block, with an engine combining several of these cylinder blocks. The cylinder block being the heart of the engine receives too much heat. This paper aims to evaluate the performed static thermal analysis of the block under severe thermal conditions. The block model and analysis are performed using Solidworks and Ansys Workbench. Thermal analysis is performed on the Cylinder block with structural steel to validate thermal properties and working.