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.
The cylinder crankcase, code 11.01203-1642-1.T, is the core structural housing of the MAN L21/31 engine, supporting the crankshaft, main bearings, and cylinder assemblies while absorbing the immense mechanical forces generated during combustion. Engineered for high rigidity and vibration damping, this heavy-duty component ensures precise alignment of all rotating parts and provides the foundation for stable, low-noise engine operation. Its robust design is essential for long service life and reliable performance in continuous marine propulsion and industrial power generation environments.
The pressure rod H 27216 is a high-strength mechanical transmission component used in the valve actuation system of the Sulzer ASL25 engine, transferring motion from the camshaft mechanism to the valve assembly. Manufactured for exceptional rigidity, straightness, and surface durability, the pressure rod ensures accurate motion control and consistent valve operation under extreme cyclic loading. By maintaining precise geometry and minimizing deflection, H 27216 helps preserve correct valve timing, reduce vibration, and support the overall efficiency and durability of the engine’s valve train system.
The spring H 27705 is a critical control element in the valve train of the Sulzer ASL25 engine, responsible for maintaining precise valve timing by ensuring rapid and consistent valve closure during each engine cycle. Engineered for high fatigue resistance and dimensional stability, this spring performs reliably under repeated compression, elevated temperatures, and continuous dynamic loading. Its carefully calibrated stiffness guarantees optimal contact between camshaft, valve, and rocker mechanism, contributing directly to efficient combustion, reduced mechanical wear, and smooth long-term engine operation.
The valve guide H 27153 is a precision-machined component that ensures accurate axial alignment and controlled movement of the engine valve within the cylinder head of the Sulzer ASL25 engine. Designed to withstand high combustion temperatures, continuous mechanical load, and aggressive operating conditions, this valve guide minimizes stem wear and maintains proper valve seating over long service intervals. Its optimized material composition and surface finish reduce friction, support efficient heat transfer from the valve stem to the cylinder head, and play a crucial role in sustaining stable combustion performance and long-term engine reliability.
The pipe clamp, code 06.66012-1101.0, is an important support component in the MAN L21/31 engine, used to securely fasten pipes and hoses to the engine structure. It prevents unwanted movement, vibration, and mechanical stress on fluid lines, reducing the risk of fatigue or leakage. Designed for durability and precise fit, the pipe clamp supports safe routing of oil, fuel, and cooling lines, contributing to orderly installation, easier maintenance, and dependable engine operation in harsh marine and industrial environments.
The round seal ring, code 06.56933-2418.0, is a critical sealing element in the MAN L21/31 engine, used to prevent leakage at static or dynamic joints within oil, fuel, or cooling circuits. Manufactured from durable, heat- and pressure-resistant materials, it ensures reliable sealing even under demanding operating conditions. By maintaining tight connections and preventing contamination or fluid loss, this seal ring contributes directly to engine cleanliness, efficiency, and long-term reliability.
The plug screw, code 06.08045-0144.0, is a precision sealing fastener used in the MAN L21/31 engine to close threaded ports in lubrication, cooling, or fuel systems. Designed to withstand pressure, temperature fluctuations, and vibration, this component ensures leak-free sealing of inspection openings or fluid channels. Its robust material quality and accurate thread geometry are essential for maintaining system integrity and preventing fluid loss during continuous marine or stationary engine operation.
The connecting rod with cover H 33001 is a precision-engineered power transmission component that converts the linear motion of the piston into rotational motion of the crankshaft in the Sulzer ASL25 engine. Designed to handle high compressive and tensile loads, this assembly ensures accurate alignment of the bearing surfaces and smooth force transfer during every engine cycle. Its robust construction, precise machining, and balanced design minimize vibration and bearing wear, making it essential for efficient combustion energy utilization and long-term durability of the engine’s rotating assembly.
The connecting rod bolt H 33030 is a safety-critical fastening element designed to secure the connecting rod and cap assembly in the Sulzer ASL25 engine. Engineered for extremely high tensile loads and fatigue resistance, this bolt maintains clamping force under dynamic inertia forces and high-cycle engine operation. Manufactured with precise threading and controlled material properties, it ensures reliable preload, prevents loosening, and safeguards the integrity of the crank mechanism, directly supporting long-term engine reliability and operational safety.