The Mercedes OM403 engine is a 10-cylinder V-shaped engine. This unit was developed in the early seventies and was installed mainly on trucks.
A characteristic feature of the engine of this model is a special modular layout, which allowed to reduce the prime cost of the engines. As a coolant in the Mercedes OM403 engine, ordinary water is used, which, on the one hand, makes it cheaper to operate, and on the other hand, increases the number of potential problems and malfunctions associated with the effect of water on engine elements.
Mercedes OM 403 10-cylinder engines with a working area of 15.9 liters are capable of delivering power at the level of 320 hp. (235 kW). Each cylinder is equipped with two valves. These motors are highly efficient and reliable.
Specifications
| Engine’s type | diesel |
| Also called | OM 403 |
| Production years | 05/1974 |
| End of release | 09/1983 |
| Power output, hp / kW | 320 / 235 at 2500 rpm |
| Displacement, cc | 15900 |
| Number of cylinders | 10 |
| Valves | 20 |
| Torque output, Nm / rpm | 1600 |
| Compression ratio (compression) | 17.2:1 |
| Cylinder bore, mm | 125 |
| Piston stroke, mm | 130 |
| Crankshaft bearings | 6 |
| Configuration | V |
| Fuel type | diesel |
| Fuel system | inline injection pump |
| Cylinder head | OHV |
| Timing mechanism | spur gear |
| Timing | rocker arm |
| Cooling | water |
The high power of the Mercedes OM 403 engines at low revs makes them versatile in terms of gearbox compatibility.
The motors themselves are also used in a wide variety of applications. These are trucks, and construction loaders, and municipal vehicles (for example, garbage trucks). At the same time, the OM403 is perfectly combined with various types of chassis, axles and braking systems.
Engine Modifications
- OM 403.900 with 184 kW (250 HP);
- OM 403.905 with 236 kW (320 HP). Issue 9/1970 – 5/1975. For models MB 1932, 1632, 2232, 2032;
- OM 403.906 with 184 kW (250 HP). Issue 1/1969 – 4/1972. For models MB F 193, F 263, F 463;
- OM 403.910 with a capacity of 184-236 kW (250-320 hp). For MB Comfort class 400 – S211, 400 – S215;
- OM 403.911;
- OM 403.915 with 236 kW (320 HP). Issue 1/1972 – 12/1975. For models MB 1932, 1632, 2232, 2032;
- OM 403.916 with 236 kW (320 HP). Issue 5/1974 – 9/1983. For models MB 1932, 2632, 1632;
- OM 403.917 with 236 kW (320 HP). Issue 4/1972 – 12/1974. For models MB F 130, F 193, F 263;
- OM 403.918 with 236 kW (320 HP). Issue 7/1975 – 6/1983. For models MB O 303 – O 303;
- OM 403.919 with 236 kW (320 HP). Issue 4/1972 – 12/1974. For models MB F 130, F 193, F 263;
- OM 403.930 with 236 kW (320 HP). Issue 4/1972 – 12/1974. For models MB F 130, F 193, F 263;
- OM 403.931 with 236 kW (320 HP). Issue 8/1973 – 9/1983. For models MB 1932, 2632, 1632, 2232;
- OM 403.932 with 236 kW (320 HP). Issue 5/1974 – 9/1983. For models MB 1932, 2632, 1632, 2232, 2032;
- OM 403.933 with 261 kW (355 HP). Issue 8/1973 – 9/1983. For MB 2632;
- OM 403.934 with 236 kW (320 HP). Issue 4/1972 – 12/1985. For models MB 1932, 1632, 2232;
- OM 403.935 with 261 kW (355 HP). Issue 8/1973 – 9/1983. For models MB 1932, 1632, 2232.
