The OM346 engine is a 6-cylinder direct injection engine with a displacement of 10.8 liters. The arrangement of the cylinders is in-line, like all engines of the OM 300 series.
The main areas of application were medium and heavy trucks and Mercedes-Benz buses. From about 1970, the engines began to be replaced by the newly developed OM 400 series motors, but it was not until 1978 that they finally ceased production.
Specifications
| Engine’s type | diesel |
| Also called | OM 346 h |
| Production years | 01.1964 |
| Power output, kW (hp) | 132 (180), 149 (202) (154 with switchable fan) at 2200 rpm |
| Displacement, cc | 10809 |
| Number of cylinders | 6 |
| Valves | 12 |
| Compression ratio (compression) | 17.5:1 |
| Cylinder bore, mm | 128 |
| Piston stroke, mm | 140 |
| Crankshaft bearings | 7 |
| Configuration | inline |
| Fuel type | diesel |
| Fuel system | direct injection |
| Turbine | intake |
| Cylinder head | OHV |
| Timing mechanism | spur gear |
| Timing | rocker arm |
| Cooling | water |
Modifications
- OM 346.910 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Released 1.1964 – 1.1978. For Mercedes Benz 19t – 1920, 26t – 2620, 16t – 1620, 22t – 2220.
- OM 346.911 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Released 1.1964 – 1.1978. For Mercedes Benz O317 models.
- OM 346.912 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Produced from 1.1964 to 9.1967. For Mercedes Benz models 19t -1920, 16t -1620, 16t -1623, 22t -2220, 20t -2020, 20t – 2023.
- OM 346.913 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Released 1.1964 – 1.1978. For Mercedes Benz 19 t -1920, 26t -2620, 24t -2420,16t -1620, 22t -2220.
- OM 346.914 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Released 1.1964 – 1.1978. For Mercedes Benz 19t -1918, 16t -1618, 14t -1418 models.
- OM 346.915 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz 14t -1418 models.
- OM 346.916 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced from 1.1966 – 12.1973. For Mercedes Benz 15t -1518 models.
- OM 346.917 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Produced from 1.1966 – 12.1973. For Mercedes Benz models 19t -1920, 19t -1923.
- OM 346.918 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Released 1.1964 – 1.1978. For Mercedes Benz O 317, (O317).
- OM 346.919 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128. Mercedes Benz Industrial engine.
- OM 346.940 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128. Mercedes Benz Industrial engine.
- OM 346.941 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Produced 1.1964 – 12.1969. For Mercedes Benz models 3t -326, 3t -334.
- OM 346.942 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128, 155 kW (210 hp). Produced 1.1964 – 12.1969. For Mercedes Benz models 3t -326, 3t -333, 3t -334.
- OM 346.943 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz models 3t -329, 3t -331, 3t -332.
- OM 346.944 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz models 3t -329, 3t -331, 3t -332.
- OM 346.945 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz models 3t -329, 3t -331, 3t -332.
- OM 346.946 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz 14t -1418 models.
- OM 346.947 – 6-cylinder, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128. Mercedes Benz Industrial engine.
- OM 346.951 – 6 cylinders, 10809 cc, 2 valves per cylinder, 140 stroke, bore 128, Mercedes Benz Industrial engine.
- OM 346.952 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 141 kW (192 hp). Produced 1.1964 – 12.1969. For Mercedes Benz 16t -1619 models.
- OM 346.953 – 6-cylinder, 10809 cc displacement, 2 valves per cylinder, 140 stroke, bore 128, 136 kW (185 hp). Produced 1.1964 – 12.1969. For Mercedes Benz 14t -1418 models.
