The complete cylinder cover assembly, marked by code number K 27100, is a sophisticated and integral component of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 diesel engine. It includes several key parts: insert bush K 27107, valve seat K 27108, O-ring K 27122, and valve guide K 27112 with its own O-ring K 27113. Together, these elements ensure optimal combustion, efficient heat management, and secure valve operation. This assembly is crucial for maintaining proper sealing and pressure control within the engine's cylinder head. Precision-built and subjected to extreme conditions, the cylinder cover assembly plays a major role in engine performance, and its upkeep is essential for continued reliable service.