Mercedes OM651 engine
Content
- Specifications of the Mercedes OM651 1.8 and 2.2 diesel engine
- Description of the engine device OM 651 1.8 and 2.2 liters
- Fuel consumption ICE OM651
- Which cars were equipped with the Mercedes OM 651 power unit
- Reviews on the OM651 engine, its pros and cons
- Mercedes OM 651 1.8 and 2.2 l internal combustion engine maintenance schedule
- Disadvantages, breakdowns and problems of the OM 651 engine
- The price of the Mercedes OM651 engine new and used
A series of Mercedes OM651 diesel engines with a volume of 1.8 and 2.2 liters has been assembled since 2008 and is installed on many modern models of the German concern, including commercial ones. This power unit exists in a huge number of different versions and modifications.
R4 includes: OM616 OM601 OM604 OM611 OM640 OM646 OM654 OM668
Specifications of the Mercedes OM651 1.8 and 2.2 diesel engine
| A type | in-line |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Exact volume | 1796 cm³ |
| Bore | 83 mm |
| Piston stroke | 83 mm |
| Supply system | Common Rail |
| Power | 109 hp |
| Torque | 250 Nm |
| Compression ratio | 16.2 |
| fuel type | diesel |
| Ecologist. norm | EURO 5/6 |
| A type | in-line |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Exact volume | 1796 cm³ |
| Bore | 83 mm |
| Piston stroke | 83 mm |
| Supply system | Common Rail |
| Power | 136 hp |
| Torque | 300 Nm |
| Compression ratio | 16.2 |
| fuel type | diesel |
| Ecologist. norm | EURO 5/6 |
| A type | in-line |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Exact volume | 2143 cm³ |
| Bore | 83 mm |
| Piston stroke | 99 mm |
| Supply system | Common Rail |
| Power | 95 - 143 HP |
| Torque | 250 - 360 Nm |
| Compression ratio | 16.2 |
| fuel type | diesel |
| Ecologist. norm | EURO 5/6 |
| A type | in-line |
| Number of cylinders | 4 |
| Number of valves | 16 |
| Exact volume | 2143 cm³ |
| Bore | 83 mm |
| Piston stroke | 99 mm |
| Supply system | Common Rail |
| Power | 163 - 204 HP |
| Torque | 350 - 500 Nm |
| Compression ratio | 16.2 |
| fuel type | diesel |
| Ecologist. norm | EURO 5/6 |
The weight of the OM651 motor according to the catalog is 203.8 kg
Description of the engine device OM 651 1.8 and 2.2 liters
In 2008, Mercedes introduced a new generation of its 4-cylinder diesel units. Here is a cast-iron cylinder block, an aluminum 16-valve head with hydraulic lifters and a combined timing drive from a roller chain, several gears and balancer shafts. Simple versions of the engine are equipped with an IHI VV20 or IHI VV21 variable geometry turbine, and the most powerful modifications of this engine received a BorgWarner R2S bi-turbo system.
Engine number OM651 is located at the junction of the block with the pallet
Initially, powerful versions of the diesel were equipped with a Delphi fuel system with piezo injectors, which caused a lot of trouble, and since 2010 they began to be changed to electromagnetic ones. And since 2011, a revocable campaign began to replace injectors for previously produced units. Basic engine modifications have a Bosch fuel system and electromagnetic injectors.
Fuel consumption ICE OM651
On the example of a 250 Mercedes E 2015 CDI with a manual transmission:
| City | 6.9 liters |
| Track | 4.4 liters |
| Mixed | 5.3 liters |
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Which cars were equipped with the Mercedes OM 651 power unit
| A-Class W176 | 2012 – 2018 |
| B-Class W246 | 2011 – 2018 |
| C-Class W204 | 2008 – 2015 |
| C-Class W205 | 2014 – 2018 |
| CLA-Class C117 | 2013 – 2018 |
| CLS-Class C218 | 2011 – 2018 |
| SLK-Class R172 | 2012 – 2017 |
| E Class W212 | 2009 – 2016 |
| S-Class W221 | 2011 – 2013 |
| S-Class W222 | 2014 – 2017 |
| GLA-Class X156 | 2013 – 2019 |
| GLK Class X204 | 2009 – 2015 |
| GLC-Class X253 | 2015 – 2019 |
| M-Class W166 | 2011 – 2018 |
| V-Class W639 | 2010 – 2014 |
| V-Class W447 | 2014 – 2019 |
| Sprinter W906 | 2009 – 2018 |
| Sprinter W907 | 2018 - p.t. |
| Q30 1 (H15) | 2015 – 2019 |
| QX30 1 (H15) | 2016 – 2019 |
| Q50 1 (V37) | 2013 – 2020 |
| Q70 1 (Y51) | 2015 – 2018 |
Reviews on the OM651 engine, its pros and cons
Advantages:
- With proper care, a decent resource
- Modest consumption for such power
- Extensive experience in repair
- The head has hydraulic lifters.
Disadvantages:
- Capricious fuel equipment Delphi
- Often there is a rotation of the liners
- Low resource timing chain tensioner
- Injectors constantly stick to the head
Mercedes OM 651 1.8 and 2.2 l internal combustion engine maintenance schedule
| Periodicity | every 10 km |
| The volume of lubricant in the internal combustion engine | 7.2 liters * |
| Needed for replacement | about 6.5 liters * |
| What kind of oil | 5W-30, 5W-40 |
| Timing drive type | chain |
| Declared resource | is not limited |
| On practice | 250 000 km |
| On break/jump | valve bends |
| Adjustment | not required |
| Adjustment principle | hydraulic compensators |
| The oil filter | 10 thousand km |
| Air filter | 10 thousand km |
| Fuel filter | 30 thousand km |
| Spark plug | 90 thousand km |
| Auxiliary belt | 90 thousand km |
| Cooling liquid | 5 years or 90 km |
Disadvantages, breakdowns and problems of the OM 651 engine
Until 2011, the main versions were equipped with a Delphi fuel system with piezo injectors, which were prone to leaks, which often led to water hammer with piston burnout. There was even a revocable company to replace them with simpler electromagnetic ones. Engine modifications with a Bosch fuel system have no reliability problems.
Many owners of cars with such a diesel engine are faced with cranking liners. This is caused by dilution of superheated oil due to a clogged heat exchanger or a drop in lubrication pressure due to a failed variable displacement oil pump. You can insert a plug into the pump control valve and it will work at maximum.
The combined timing drive here consists of a roller chain and several gears. Moreover, the chain can serve up to 300 thousand km, but its hydraulic tensioner is often rented much earlier, and replacing this tensioner is quite laborious and expensive.
A lot of trouble in this diesel engine is delivered by cracks in the plastic intake manifold, sticking to the head of the nozzle block and an oil cup forever flowing over the gasket. The weak points of the motor also include bi-turbo version turbines and a plastic pan.
The manufacturer claims the resource of the OM651 engine is 220 km, but it also serves 000 km.
The price of the Mercedes OM651 engine new and used
| The minimum cost | 180 000 rubles |
| Average price on the secondary | 250 000 rubles |
| Maximum cost | 400 000 rubles |
| Contract engine abroad | 3 000 euro |
| Buy such a new unit | 18 750 euro |
| Condition: | BOO |
| Box & Papers: | complete engine |
| Working volume: | 1.8 liters |
| Power: | 109 hp |
* We do not sell engines, the price is for reference
