Main Engine 4-Stroke · Main Engines (4-Stroke)
This marine propulsion engine is designed for robust and reliable performance in various maritime applications. The MAN Truck & Bus SE MMNBN24.2CO4 engine, produced in 2021, is a powerful 12-cylinder unit with a displacement of 24.2 liters per cylinder, operating on a 4-stroke compression ignition cycle. It features a direct injection common rail fuel system and is turbocharged, delivering a rated power of 1066 kW at 2100 RPM, with a maximum torque of 4880 Nm under the 4-Mode General Cycle (E3) duty cycle. Common issues that can arise with this engine include fuel-injection deterioration, lubricating-oil contamination, cooling-system fouling, charge-air restriction, and valve-train wear. These issues may manifest as uneven firing, smoke, increased exhaust temperatures, metallic debris, or abnormal noise. It is crucial to keep spare parts on hand, including fuel-system service items, lubricating-oil and fuel filters, cooling-system seals, valve-train consumables, and injector-related service parts, among others. Regular service checks should include monitoring lubricating-oil pressure, coolant temperature, exhaust temperatures, load balance, crankcase condition, and abnormal vibration or noise. Inspections should cover filters, coolers, fuel equipment, valve gear, turbocharging equipment, mounts, flexible connections, and safety shutdown devices. A surveyor will typically assess machinery spaces for evidence of disciplined maintenance, intact guards, and reliable safety functions.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
What our service work and the manufacturer documentation say about keeping this model running.
Review operating trends for lubricating-oil pressure, coolant temperature, exhaust temperatures, load balance, crankcase condition and abnormal vibration or noise. Inspect filters, coolers, fuel equipment, valve gear, turbocharging equipment, mounts, flexible connections and safety shutdown devices in accordance with the installed configuration. Check for fuel, oil, coolant and exhaust leakage and verify that protective alarms and shutdowns are functional. A surveyor will normally look for evidence of disciplined maintenance, clean machinery spaces, leak control, intact guards and reliable safety functions. Use the engine serial number and manufacturer documentation for all exact wear limits, adjustment values and overhaul criteria.
Useful onboard spares typically include fuel-system service items, lubricating-oil and fuel filters, cooling-system seals, belts where fitted, valve-train consumables, injector-related service parts, sensors and common gaskets or O-rings. Critical spares should be selected against the exact engine serial number, installed emissions package and vessel redundancy; refer to the manufacturer parts documentation before ordering.
Free of charge — send us your request for MAN Truck & Bus SE equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, MAN Truck & Bus SE first.
Tell us what you need for this MAN Truck & Bus SE MMNBN24.2CO4 — a part, a service call, a second opinion. Are you MAN Truck & Bus SE? Claim this brand page.
Service engineer? Write the day report for this MMNBN24.2CO4 in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.