Mercedes OM668 engine
Content
The 1.7-liter Mercedes OM668 or Vaneo 1.7 CDI engine was produced from 1998 to 2005 and was installed only on the first generation A-Class or a similar Vaneo compact MPV. The diesel engine had two versions: the regular DE 17 LA and the derated DE 17 LA red. without intercooler.
R4 includes: OM615 OM601 OM604 OM611 OM640 OM646 OM651 OM654
Technical characteristics of the engine Mercedes OM668 1.7 CDI
| Exact volume | 1689 cm³ |
| Supply system | Common Rail |
| Internal combustion engine power | 60 - 75 HP |
| Torque | 160 Nm |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Bore | 80 mm |
| Piston stroke | 84 mm |
| Compression ratio | 19.5 |
| Features of the internal combustion engine | EGR |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | BorgWarner K03 |
| What kind of oil to pour | 4.5 liters 5W-30 |
| fuel type | diesel |
| Environmental class | EURO 3 |
| Approximate resource | 250 000 km |
| Exact volume | 1689 cm³ |
| Supply system | Common Rail |
| Internal combustion engine power | 90 - 95 HP |
| Torque | 180 Nm |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Bore | 80 mm |
| Piston stroke | 84 mm |
| Compression ratio | 19.5 |
| Features of the internal combustion engine | EGR, intercooler |
| Hydraulic compensators | Yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | BorgWarner K03 |
| What kind of oil to pour | 4.5 liters 5W-30 |
| fuel type | diesel |
| Environmental class | EURO 3 |
| Approximate resource | 240 000 km |
The weight of the OM668 motor according to the catalog is 136 kg
Engine number OM668 is located at the junction of the block with the pallet
Fuel consumption of internal combustion engine Mercedes OM668
On the example of a 1.7 Mercedes Vaneo 2003 CDI with a manual transmission:
| City | 7.4 liters |
| Track | 5.1 liters |
| Mixed | 5.9 liters |
Which cars were equipped with the OM668 1.7 l engine
| A-Class W168 | 1998 – 2004 |
| They have W414 | 2001 – 2005 |
Disadvantages, breakdowns and problems of the OM668 internal combustion engine
There is little space under the hood and for servicing the diesel engine must be lowered with a subframe
The Bosch fuel system is reliable, often only the fuel pressure regulator fails
If there is a loss of thrust, check the pressure sensor in the intake manifold and its pipe
Regularly there are fuel leaks through the injection pump or oil through the heat exchanger
The weak points of this unit also include a flow meter, a generator and an EGR valve
The turbine cannot be called weak, but it often requires repair by 200 km.
After 200 km, piston rings often lie and lubricant consumption appears.
