Located below the engine’s cylinder head, the crankcase provides a sealed environment for the crank system, protecting moving parts from contamination and damage. It also supports the oil breather system, helping manage crankcase ventilation and engine blow-by gas while promoting efficient lubrication and cooling. The crankcase anchors key components, including the crankshaft, engine control system, and cylinder head, and its intricate crankcase casting ensures oil circulation, serving as the core structure of the engine.