The OM622 engine is a 1598 cc 3 inline 4-cylinder diesel engine with common rail direct injection technology. The cylinder diameter is 80 mm and the piston stroke is 79.5 mm. The Compression ratio is 15.4:1. The engine crankcase is made of cast iron, the cylinder head is made of aluminum alloy.
Mercedes-Benz OM 622 is a modification of the OM 626 engine with reduced performance characteristics, specially designed for use in minibuses. The working volume remained unchanged, but the layout has changed, due to which the power unit is installed transversely with a drive on the front wheels. Engine power has decreased and varies from 88 to 114 hp.
Specifications
| Production years | 2014-2019 |
| Displacement, cc | 1598 |
| Fuel system | Common Rail |
| Power output, hp | 88 – 114 |
| Torque output, Nm | 230 – 270 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 80 |
| Piston stroke, mm | 79.5 |
| Compression ratio | 15.4:1 |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Turbocharging | yes |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.9 |
| Fuel type | diesel |
| Euro standards | EURO 6 |
| Weight, kg | 177 |
The engine is equipped with a cast iron crankcase, the cylinder head is made of aluminum alloy. The pistons are made of steel, which is a feature of these engines, because most modern diesel units use aluminum pistons. Timing – type DOHC. In other words, there are 4 valves per cylinder and 2 overhead camshafts.
The outlet system uses a VTG variable length rotary engine. The turbine size is 37.5 mm. The movement of the turbocharger blades is controlled by a vacuum chamber. The latter receives signals from the electrical converter CU. The outlet is also equipped with an EGR valve. First, the outlet gases enter the filter, are cooled, and then fed to the compressor. Then the selective neutralizer processes them. All this is done with the aim of meeting European environmental standards as much as possible.
The engine was installed on:
- Mercedes Vito W447 in 2014 – 2019 (109, 111 and 114 CDI).
Disadvantages of the OM622 engine
- The engine is a version of the Renault R9M, whose timing chain can stretch by 150,000 km;
- The EGR valve gets dirty very quickly;
- Oil leaks are also encountered regularly.
Frequently asked questions about the Mercedes OM622
How much power does the Mercedes OM622 make?
The Mercedes OM622 develops 88 - 114 hp and 230 - 270 Nm of torque.
How much oil does the Mercedes OM622 take and which one?
Engine oil capacity: 5.9 liters. Recommended oil: 5W-30.
Does the Mercedes OM622 have a timing belt or chain?
The Mercedes OM622 uses a timing chain.
Is the Mercedes OM622 turbocharged?
Yes, the Mercedes OM622 is turbocharged.
Does the Mercedes OM622 need valve clearance adjustment?
No, the Mercedes OM622 has hydraulic lifters, so the valve clearances do not need to be adjusted.
What cars was the Mercedes OM622 installed on?
Mercedes Vito W447 in 2014 - 2019 (109, 111 and 114 CDI).
What are the common problems of the Mercedes OM622?
The engine is a version of the Renault R9M, whose timing chain can stretch by 150,000 km. The EGR valve gets dirty very quickly. All known problems.
