The plug screw, code 06.08042-0142.B, is a durable closing element designed to seal threaded openings and service channels within the MAN L21/31 engine. Its precision-cut thread and carefully finished contact surfaces guarantee secure installation and leak-free performance under demanding operating conditions. Typically used to close drilling points, lubrication passages, or auxiliary ports, the plug screw allows easy access during inspection or servicing while ensuring reliable re-sealing after reinstallation. Manufactured from high-strength materials with protective surface treatment, it offers excellent resistance to corrosion, vibration, and thermal stress, supporting long-term engine reliability and operational safety.

The closing screw, code 11.07294-0004.0, serves as a reliable sealing and fastening element used to close auxiliary openings, service ports, or inspection points within the MAN L21/31 engine. Precisely machined threads and sealing surfaces ensure secure installation and pressure-tight closure even in environments exposed to vibration, thermal cycling, and mechanical stress. Designed for repeated assembly and disassembly, the closing screw enables efficient inspection and maintenance procedures without compromising sealing performance. Its robust material properties and corrosion-resistant finish ensure durability and dependable operation throughout extended service life in marine and stationary diesel engine applications.

The gasket, code 06.56936-2355.0, is a vital sealing component used to ensure tight and reliable connections between mating surfaces within the MAN L21/31 engine. Positioned between flanged or bolted interfaces, it compensates for minor surface irregularities and maintains leak-free operation under varying pressure and temperature conditions. Manufactured from high-quality materials resistant to heat, mechanical stress, and engine fluids, the gasket preserves sealing integrity throughout long service intervals. By preventing the escape of lubricants or cooling media and blocking the ingress of contaminants, this essential element supports safe engine operation, protects internal components, and contributes to overall system efficiency in demanding marine and power-generation environments.

The seal H 74133 is an essential sealing element used within the Sulzer ASL25 engine to prevent leakage and maintain pressure integrity in fluid systems. Engineered from high-performance sealing material, it resists temperature fluctuations, oil exposure, and mechanical stress typical of heavy-duty engine operation. Its precise geometry ensures a tight interface between components, safeguarding internal systems from contamination and fluid loss. The reliability of the H 74133 seal is crucial for maintaining stable operating conditions, improving system efficiency, and supporting the long-term operational integrity of the engine.

The sliding sleeve N 73119 is a precision guiding element within the Sulzer ASL25 engine designed to facilitate controlled axial movement between interacting mechanical components. Manufactured from wear-resistant material and machined to tight tolerances, it provides a smooth sliding interface that minimizes friction and mechanical wear. Operating under continuous load, vibration, and thermal influence, the sleeve ensures proper alignment and stable motion of the associated mechanism. By maintaining accurate positioning and reducing stress on adjacent components, the N 73119 sliding sleeve contributes to the long-term reliability and durability of the engine’s mechanical systems.

The O-ring H 16192 is a precision elastomer sealing component used in the Sulzer ASL25 engine to ensure leak-free sealing in fluid and pressure interfaces. Designed to maintain elasticity and dimensional stability under varying temperatures, vibration, and exposure to oil or fuel, it provides a reliable barrier between mating surfaces. Its compact design allows it to fit precisely within grooves and sealing channels, ensuring effective compression and long-lasting sealing performance. Despite its small size, the H 16192 O-ring plays a vital role in protecting engine systems from leakage and contamination, thereby supporting reliable operation and extended service intervals.

The gasket, code 06.56936-2355.0, is a vital sealing element designed to ensure leak-free interfaces between mating surfaces in the MAN L21/31 engine. Installed between flanged components, it compensates for minor surface irregularities and maintains tight sealing under varying pressure and temperature conditions. Produced from high-quality, heat- and fluid-resistant materials, the gasket ensures long service life while preventing the escape of fluids and the ingress of contaminants. By maintaining system tightness and protecting internal components, this gasket contributes significantly to the efficiency, reliability, and safe operation of marine and power-generation diesel engines.

The lock washer, code 06.16169-0003.0, is an essential securing element used throughout the MAN L21/31 engine to prevent the loosening of bolted joints under vibration and dynamic mechanical loads. Designed with a specific geometry that creates additional friction and mechanical resistance, it ensures that fasteners maintain their required preload during long operating cycles. Even though small in size, the lock washer plays a crucial role in maintaining structural integrity and operational safety within complex engine assemblies. Manufactured from durable, fatigue-resistant materials, it provides consistent locking performance and supports reliable engine operation in demanding marine and stationary power applications.

The thermostat housing, code 11.41100-0627.0, is a critical structural component within the cooling system of the MAN L21/31 engine, designed to securely accommodate the thermostat unit and guide the controlled flow of cooling water. Precisely machined to ensure proper sealing and alignment, the housing maintains stable coolant circulation while protecting the thermostat from external mechanical stresses. Its robust construction enables it to withstand continuous temperature fluctuations, pressure variations, and vibration typical of medium-speed diesel engines. By ensuring accurate positioning and reliable sealing of the thermostat assembly, the housing contributes to efficient thermal management, helping the engine maintain optimal operating temperatures and long-term operational stability.

The seal H 82403 is a vital sealing component designed to ensure leak-free operation within fluid or pressure interfaces of the Sulzer ASL25 engine. Manufactured from high-quality sealing material resistant to oil, temperature variations, and mechanical stress, it provides a durable barrier that prevents fluid leakage and protects internal components from contamination. Its precise fit and long-lasting elasticity support stable system pressure and efficient operation of the engine’s subsystems. The reliability of the H 82403 seal is essential for maintaining operational safety, reducing maintenance requirements, and extending the service life of the engine.