The thermostat housing with code 11.41100-0626.0 forms the protective and functional enclosure for the cooling water thermostat in the MAN L21/31 engine. This robust housing ensures proper coolant routing, pressure containment, and leak-free operation within the engine’s cooling circuit. Engineered for high thermal resistance and mechanical strength, the thermostat housing plays a vital role in maintaining precise temperature control, safeguarding internal components, and ensuring reliable engine operation under continuous load conditions.

The intermediate piece with code 11.41199-0008.0 serves as a precision connecting element within the MAN L21/31 engine assembly, providing accurate alignment and secure mechanical integration between adjoining components. Designed to withstand vibration, thermal expansion, and dynamic loading, this component ensures correct geometry of the engine system and smooth transfer of forces between connected structures. Its dimensional accuracy and material integrity are essential for long-term operational stability and low-maintenance performance in demanding marine and industrial environments.

The cooling water thermostat with code 11.06011-0073.0 is a critical temperature-regulating component in the MAN L21/31 engine, responsible for maintaining the engine within its optimal operating temperature range. By automatically controlling coolant flow based on thermal conditions, the thermostat ensures rapid warm-up, stable combustion performance, and effective protection against overheating. Its precise response characteristics directly contribute to improved fuel efficiency, reduced mechanical wear, and extended service life — especially under continuous heavy-duty marine and power-generation operation.

The piston H 34001 is a core combustion component of the Sulzer ASL25 engine, designed to withstand extreme thermal loads, high combustion pressures, and continuous mechanical stress. Manufactured from high-strength alloy with optimized geometry and surface treatment, it ensures efficient force transfer, reduced friction, and controlled oil consumption. Its precision engineering supports stable engine performance, low emissions, and long-term reliability, making H 34001 essential for demanding marine and power-generation applications.

The valve H 27702 is a critical flow-control component within the Sulzer ASL25 engine’s combustion system, responsible for regulating the intake and exhaust gas exchange during each engine cycle. Engineered for high-temperature resistance, wear durability, and dimensional stability, this valve ensures tight sealing, efficient airflow, and optimal combustion performance. Its robust construction and precision machining reduce leakage, support consistent power output, and extend service life under continuous heavy-duty operation in marine and industrial environments.

The adjustment screw H 27217 is a precision control component used in the valve train system of the Sulzer ASL25 engine, enabling accurate setting of valve clearance and timing parameters. Designed to maintain stable positioning under vibration, thermal expansion, and continuous mechanical load, this screw ensures consistent engine performance and protects critical valve components from premature wear. Manufactured from high-strength material with precise threading, H 27217 provides reliable adjustment, long-term dimensional stability, and contributes directly to efficient combustion and smooth engine operation.

The seal ring with code 06.56190-0739-1.0 is a precision sealing element used throughout the MAN L21/31 engine to protect critical systems from fluid leakage and pressure loss. Designed to withstand aggressive temperatures, pressure fluctuations, and chemical exposure, this ring provides long-term elastic sealing performance in lubricating oil, fuel, and cooling circuits. Its reliability is essential for preserving system cleanliness, reducing wear, and ensuring continuous, trouble-free engine operation in demanding marine and industrial environments.

The gasket, code 06.56936-2355.0, serves as a vital sealing interface in the MAN L21/31 engine, preventing leakage of oil, coolant, and combustion gases between joined surfaces. Engineered from heat- and pressure-resistant materials, this gasket ensures tight, stable sealing under continuous high-temperature operation and dynamic load conditions. By maintaining system integrity and preventing contamination between engine circuits, it plays a direct role in operational efficiency, environmental compliance, and reduced maintenance requirements.

The tie rod with code 11.01295-0276-1.C is a critical structural fastener in the MAN L21/31 engine, designed to clamp the cylinder block, crankcase, and cylinder head into a rigid and precisely aligned assembly. Manufactured from high-tensile alloy steel, this component maintains uniform clamping force across the engine structure, even under extreme combustion pressures and thermal expansion. Its strength and dimensional accuracy are essential for preserving engine geometry, minimizing vibration, and preventing leakage, making it a cornerstone of long-term engine reliability in marine propulsion and power generation applications.

The sealing ring H 21423 is a critical sealing component used in various fluid and pressure interfaces of the Sulzer ASL25 engine. Designed to provide a tight, leak-free barrier under varying pressure, temperature, and vibration conditions, this sealing ring protects internal engine components from contamination and prevents loss of working fluids. Manufactured from high-quality, application-optimized material, H 21423 ensures long service life, stable sealing performance, and contributes directly to the operational safety and efficiency of the engine.