The side casing, marked with code number K 16221-AD, serves as a protective and structural enclosure on the side of the Sulzer ZV40/48 diesel engine. This robust component helps shield vital engine systems from external contaminants such as dust, moisture, and mechanical impact. It also adds to the engine’s structural stability, especially in marine and industrial applications where exposure to harsh conditions is common. Engineered for endurance, the side casing is a critical part of maintaining engine cleanliness, safety, and operational consistency.