An engine block is a crucial component of an internal combustion engine. It serves as the main structure that houses various engine parts, including the cylinders, pistons, and crankshaft. Typically made from cast iron or aluminum, the engine block provides strength and durability while also facilitating heat dissipation during operation. The design of the engine block influences the engine's performance and efficiency. It contains passages for coolant and oil, which help regulate temperature and lubrication. Proper maintenance of the engine block is essential for the overall health of the vehicle, as issues like cracks or warping can lead to significant engine problems.