Engine Mercedes OM606

Engine Mercedes OM606

The 3.0-liter inline 6-cylinder Mercedes OM606 engine was assembled from 1993 to 2001 and was installed on such popular models as the E-Class, S-Class and the Gelandewagen SUV. This power unit was offered in two versions: 300D with 136 hp and 300TD for 177 hp.

The OM606 motor is renowned for its durability. It is not without reason that the Finnish BSR team took up the task, using both a turbine and a twinchargink. The tuned OM606 produces over 500 hp and is endowed with nitrogen injection. Structurally, the diesel engines of Mercedes of the OM 602/604/605/606 series are very similar – they all have a cast iron block and aluminum heads with 4 valves per cylinder and mechanical injection pumps.


Modifications OM 606 D 30 atmospheric OM 606 D 30 turbo (OM 606 D 30 LA)
Displacement, cc 2996 2996
Power, hp (kW) at rpm 136 (100) / 5000 177 (130) / 4400
Torque output, Nm (kg-m) at rpm 210 (21) / 4600 330 (21) / 3600
Fuel type diesel fuel diesel fuel
Fuel consumption, L/100 km 6.8 – 8.3 7.9 – 8.7
Configuration inline, six-cylinder inline, six-cylinder
CO2 emission, g/km 196 – 220 196 – 220
Cylinder bore, mm 87 87
Piston stroke, mm 84 84
Valves per cylinder 4 4
Supercharger no Turbine
Compression ratio 22 22

Engine Mercedes OM606 under the hood
Prechamber OM 606 diesels (otherwise they were also called vortex chambers) are named after the method of mixing and preparing the working mixture: as a result of the piston stroke, at the end of the compression stroke, air is forced through a thin opening of the preliminary combustion chamber (prechamber) while strongly swirling. Where actually the fuel is injected. Thus, fuel combustion does not take place in the cylinder, but in a specially designed chamber, which is located in the block head. After ignition, gases in the opposite direction through the hole break out into the cylinder and press on the piston, as a result of which the working stroke occurs.

A feature of these diesels was the increased noise during operation, since all the fuel is burned in one portion. Compared to gasoline, these diesel engines were distinguished by lower fuel consumption, but at the same time low power.

4 thoughts on “Engine Mercedes OM606”

  1. Engine swap from w210 300td to w140 300td.

    W140 300td ran without oil due to leak and stuck in motion so can i get the same 300td engine from w210 it says identical . What would be different!? Will there be problems with installation, bushings, pipes for burnt gas, etc.

    Many thanks.

  2. Excellent site, very useful information!
    Can you advise the NOx value for the normally aspirated OM606 engine fitted to my 1995 E300D please?

    1. Sorry, there is no such information. We only know that the engine complies with Euro-1.

      1. Boa tarde, tenho um mercedes w463 350TD de 1993 que adaptei um motor om 606 de 177 cv com a caixa automatica existente no carro e tornou-se inguiavel em virtude de não desenvolver, parece andar 100 metros e já ir em 3ª. Estou farto de gaster dinheiro e não encontro solução. Alguem me poderá dar uma dica do que fazer.

        Good afternoon, I have a 1993 mercedes w463 350TD that I adapted a 177 hp om 606 engine with the automatic box in the car and it became unmanageable due to not developing, it seems to go 100 meters and already go in 3rd. I’m tired of wasting money and I can’t find a solution. Can anyone give me a hint what to do.

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