The OM441 line of diesel power units was put into production at the end of 1987. To this day, it is one of the most powerful 6-cylinder engines, with only the 501 Series competing in this segment.
Since the 90s, OM 441 has firmly occupied a niche in the agricultural sector. Rational fuel consumption when connecting additional functions (with which the combine harvesters are equipped) allowed the concern to get several orders from leading manufacturers of agricultural machinery. The working volume of the 441th unit is 11.3 liters, and the power, depending on the modification, varies from 204 to 340 horsepower. To increase the performance of the motor, the developers applied:
- Direct fuel supply;
- Water cooling;
- Larger cylinders;
- Turbochargers;
- 12 valves;
- Timing OHV.
In addition to agricultural machinery, OM441 engines were installed on buses, medium-duty trucks and special-purpose vehicles.
Specifications
| Engine’s type | diesel |
| Power output, hp / kW | 204-340 / 150-249 |
| Displacement, cc | 10964 |
| Number of cylinders | 6 |
| Valves | 12 |
| Compression ratio (compression) | 16.25:1 |
| Cylinder bore, mm | 128 |
| Piston stroke, mm | 142 |
| Crankshaft bearings | 4 |
| Configuration | V |
| Fuel type | diesel |
| Fuel system | inline injection pump |
| Turbine | turbo / charge air cooler |
| Cylinder head | OHV |
| Timing mechanism | spur gear |
| Timing | rocker arm |
| Cooling | water |
Frequent problems
One of the most common problems when operating the OM441LA is a malfunctioning fuel pump. The 441st is unpretentious in terms of fuel quality, but very capricious in relation to synthetic oil. Care should be taken to select the brand so as not to shorten the life of the unit. To replace a faulty fuel pump on this engine, it is enough to buy a high pressure fuel pump with a mechanical regulator. Although it is not as “sophisticated” as the electronic one, it is cheaper and can be repaired.
Explanation of marking
| OM | Heavy Fuel Oil (Diesel) ICE |
| 441 | Engine Series: V-6 |
| L | Charge air cooling. |
| A | Exhaust turbocharger. |
