BMW M57D25TU engine

The M57D25TU engine is a diesel power unit from Bavarian engineers, which is capable of producing up to 177 horsepower of maximum power at a working volume of 2.5 liters, thanks to the installation of an additional supercharger in the form of a turbine. The motor can be found under the hood of BMW 5-seriesE60 and E61 in station wagon and sedan body styles, respectively.

M57D25TU engine specifications

Advantages

The engine was developed on the basis of the three-liter M57D30, which has undergone certain changes, which made it possible to get 2.5 liters of working volume. Thanks to this, Bavarian engineers have retained the geometry with the parameters of the motors of the M51 lineup.

The cylinder block fitted to this engine is made of durable cast iron. The cylinder diameter is 80 millimeters. A crankshaft is installed inside the cylinder block, and a piston stroke of 82.8 millimeters is provided. The pistons have a compression height of 47 millimeters. The connecting rods used on the engine are characterized by a rather large height of 137.6 millimeters. Thanks to these parameters, it was possible to get 2.5 liters of working volume.

The M57D25TU engine differs slightly from the M51 range of power units due to the use of a cylinder head with two camshafts. This combination allows for optimum operation of 4 valves on each cylinder. The diameter of intake and exhaust valves does not differ, and is 26 millimeters. The valve stems also do not differ in diameter and are 6 millimeters each.

The movement of the camshafts is ensured by the timing chain drive. The chain itself has a fairly long resource, and it is declared by the manufacturers as maintenance-free. Reviews of owners of cars with such motors under the hood state that the chain really does not bring problems with normal maintenance.

Direct fuel injection is organized using the well-known Bavarian Common rail system. Additional supercharger in the form of a turbine Garrett GT2052V is characterized by the ability to change the geometry of the impeller. This makes it possible to maximize the performance of the power unit.

The EGR system is responsible for the reduction of pollutant emissions. This also has a positive effect on fuel consumption. The intake manifold is characterized by the installation of swirl flaps. Bosch DDE4.0 was used as the electronic control unit for the power unit.

Disadvantages

The engine is very prone to overheating, so it is necessary to constantly monitor the temperature readings. Otherwise, if the power unit is overheated, there is a high probability of a warped cylinder head.

Swirl flaps are a common problem with these engines, just as they are in the M47 series. During operation of the power unit, they can simply collapse and fall off inside the engine. This causes the engine to simply stop working and a major overhaul will be required. To avoid such unpleasant situations, it is best to remove these units in advance and put plugs. Only it is necessary not to forget about competent program adjustment for adequate operation of the engine without plugs.

During operation of the power unit, extraneous noise and sounds may occur. This problem is faced by almost all owners of cars with such motors under the hoods. The cause of such malfunctions is the failure of the crankshaft damper. It is necessary to change this part.

You can often encounter the problem of extraneous diesel odors in the cabin, which is accompanied by a drop in engine power. A cracked intake manifold is the main cause of such a problem. You will have to replace the part with a new one, it is better to buy a cast iron manifold, which will last longer.

Up to a mileage of 100 thousand kilometers, there are usually no problems with fuel injectors. Additional superchargers are also characterized by a fairly good resource, and if you use a quality lubricant, the life of turbines can be more than 400 thousand kilometers. It is not recommended to use bad oil, as it significantly reduces the life of the engine and turbines.

In general, owners of cars with such motors do not have big problems. Such engines serve for quite a long time, only it is necessary to timely and qualitatively service the power unit. If you use the recommended oil, the life of M57D25TU can exceed about 500 thousand kilometers.

Modifications

Only two modifications were produced during the entire production period of the power unit:

• From 2000 to 2003, the M57D25O0 version was produced, which is considered basic, because it is equipped with a Garrett GT2052V turbine. Thanks to such design features, the designers managed to achieve 163 horsepower of maximum power and peak torque of 350 Nm.
• The M57D25O1 is the next version of the engine, which was produced from 2004 to 2007. The maximum output of this engine is 177 horsepower, with a maximum torque of 400 Nm.

Tuning

This engine has been designed with rather little potential for modernization. The only thing that can be done to increase engine output is classic chip tuning. This will add up to 40 additional horsepower to the standard power figures. You should not go further, as it significantly affects the life of the motor, and will cost very expensive.

Technical specifications

The displacement of the M57D25TU engine is 2,497 cubic centimeters. It is an inline six-cylinder engine with a cylinder diameter of 84 millimeters. The crankshaft provides a piston stroke of 75.1, which provides a compression ratio of 17.5 to 1.

During operation, up to 165 grams of pollutants per kilometer are emitted into the environment. Average fuel consumption ranges from 4.7 to 7.8 liters of diesel for every 100 kilometers traveled.

Maximum power of 177 horsepower is developed at 4,000 rpm. At 2,750 rpm, thanks to the turbine, a maximum torque of 400 Nm is developed.

This engine is installed on the following models:

BMW 5-Series (E61)

BMW 5-Series (E60)