The main bearing cap, code 11.01254-0168.A, is a critical load-bearing element in the MAN L21/31 engine, securing the crankshaft bearings firmly within the crankcase. Designed to withstand extreme cyclic loads and maintain precise bearing alignment, it plays a vital role in minimizing vibration and ensuring smooth crankshaft rotation. Precision-machined and manufactured from high-strength materials, this component directly influences engine durability, efficiency, and long-term operational stability.