Characteristics
The Mercedes-Benz OM 611 engine is an in-line four-cylinder diesel engine produced at the Stuttgart-Bad Cannstatt plant between 1997 and 2006. This engine is characterized by high reliability and performance, which makes it popular among various Mercedes-Benz models.
Main features
| Characteristics | Value |
|---|---|
| Cylinder block material | Cast iron |
| Configuration | Row |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 88.3 / 88.4 |
| Cylinder diameter, mm | 88 |
| Compression ratio | 18 / 19 |
| Engine displacement, cc | 2148 / 2151 |
Power and Torque
The OM 611 is available in several power variants for different levels of performance:
- 82 hp at 3,800 rpm
- 102 hp at 3800 rpm
- 115 hp at 4200 rpm
- 125 hp at 4200 rpm
- 143 hp at 4200 rpm
Torque also varies depending on the specific engine model:
- 200 Nm at 1400 – 2600 rpm
- 235 Nm at 1500 – 2600 rpm
- 250 Nm at 1400 – 2600 rpm
- 300 Nm at 1800 – 2600 rpm
- 315 Nm at 1800 – 2600 rpm
Environmental Standards and Turbocharger
The OM 611 engines meet the Euro 3 and Euro 4 environmental standards, making them more environmentally friendly. Garrett GTA1852V and Garrett GT2052S turbochargers are used for optimum performance and efficiency.
Oil system
- Oil consumption, g/1000 km: ~300
- Engine oil: 5W-30, 5W-40
- Oil volume in the engine, l: ~6.5
- Interval of oil change, km: 7000 – 10000
Operating and performance parameters
- Engine operating temperature, deg.: ~90
- Engine weight, kg: ~150
- Engine life, thousand kilometers (according to the factory data): 500+
- Real resource in practice: 500+ thousand km
Tuning
OM 611 engine has a potential for tuning up to ~200 hp without significant loss of resource, which makes it attractive for car enthusiasts.
Auto applications
The OM 611 engine has been fitted to a wide range of Mercedes-Benz models including:
Passenger cars:
- Mercedes-Benz C 200 CDI
- Mercedes-Benz C 220 CDI
- Mercedes-Benz E 200 CDI
- Mercedes-Benz E 220 CDI
Minivans and vans:
- Mercedes-Benz Vito 108 CDI
- Mercedes-Benz Vito 110 CDI
- Mercedes-Benz Vito 112 CDI
- Mercedes-Benz V 200 CDI
- Mercedes-Benz V 220 CDI
Commercial Vehicles:
- Mercedes-Benz 208 CDI
- Mercedes-Benz 308 CDI
- Mercedes-Benz 408 CDI
- Mercedes-Benz 211 CDI
- Mercedes-Benz 311 CDI
- Mercedes-Benz 411 CDI
- Mercedes-Benz 213 CDI
- Mercedes-Benz 313 CDI
- Mercedes-Benz 413 CDI
Reliability and repair of the OM 611 engine
Motors of OM 611 series started to be put on cars from Stuttgart since 1997 and replaced the OM 604. The engine family to which the OM 611 belongs includes OM 612 and OM 613 with five or six cylinders respectively. The OM 611 has a 16-valve aluminum DOHC block head with hydrocompensators.
The timing mechanism is driven by a two-row massive chain, its life is not stated by the manufacturer, but if the chain is used properly, it may not need to be replaced at all.
OM 611 was one of the first in the world to receive the Common rail fuel supply system, with Bosch CP1 fuel injector and high-pressure injectors Bosch for 1350 bar.
The engine was produced until 2006, but since 2002 it was replaced by a more modern OM646.
Modifications of the OM 611 engine
- OM 611 DE 22 LA red. (1997 – 2003) – depending on the volume and turbocharger developed from 82 hp and 200 N-m to 115 hp and 250 N-m. Motors of this series were not intended for commercial vehicles. They are found on vehicles with the index 200 CDI.
- OM 611 DE 22 LA (1997 – 2006) – depending on the volume and turbocharger developed from 82 hp and 200 N-m to 143 hp and 315 N-m. It was intended for cars with the index 220 CDI.
Om 611 engine problems and disadvantages
- Inlet manifold flaps. At mileage over 100k miles the flaps can break off, however they almost never cause damage to the engine as they are plastic. Even if the flaps are not torn off, they will not work properly at high mileage, so it is better to remove the flaps and plug the holes for their axles.
- Crankshaft. Due to insufficient performance of the oil pump on the background of high load on the crankshaft, especially with constant driving “in tension” rotates the main liners, usually the second and fourth. It should be noted that mostly Sprinter cars suffer from such a problem, and on passenger cars it is extremely rare. To prolong the life of the crankshaft helps to replace the standard oil pump for a more productive, with two gears, from the engine OM 612 or OM 613.
- TNVD. Bosch CP1 is very reliable, but at high mileage it can snot fuel, the problem can be solved by a repair kit for 40€.
Resource of injectors on OM 611 is about 300 thousand kilometers, but every 60 thousand kilometers it is necessary to change refractory washers under the injectors. Glow plugs last about 100 thousand kilometers. Service life of the turbine is very long and can exceed 300-400 thousand km, but if you use low-quality engine oil, the resource can be very much reduced.
Tuning the engine OM 611
- Chip tuning can get about 170 – 180 hp and 380 N-m. On the resource actually does not affect.
- Hybrid turbine, more efficient fuel injector (for example, Bosch CP3), electric booster pump, modification of injectors (replacement of atomizers), replacement of intercooler, removal of all ecology, custom intake and exhaust, exhaust on 76 pipe – the result is about 250 hp and 500 N-m.
The cost of the second option is huge, easier to swap the motor to an OM 613.
MOTOR RATING: 4+