BMW M47TUD20 engine

M47TUD20 is a diesel power unit from the German concern, which was intended to be installed under the hood of the first-generation BMW X3 in the E83 body. With a working volume of 2 liters, this power unit is able to develop a maximum power of 150 horsepower.

Engine specifications M47TUD20

Advantages

All models of the Bavarian BMW X3 SUV and the 320D model that rolled off the assembly line from 2001 to 2004 placed the M47TUD20 powertrain under their hoods. The prefix TU means technical update, which is that the previous 88 millimeters of piston stroke was increased to 90 millimeters. The engine also features direct fuel injection, which resulted in reduced fuel consumption. But this led to an increase in the amount of exhaust gases, and the engine became heavier by 50 kilograms.

In parallel with the reduction in fuel consumption, this also resulted in an increase in torque. The increase in thrust was made possible by optimizing the energy conversion by precisely feeding the fuel into the combustion chamber at just the right moment.

The indicators of wear resistance, as well as the maximum mileage are very good, relative to other motors of the Bavarian manufacturer. Manufacturers have established the resource of M47TUD20 in 300 thousand kilometers. But with a certain approach, competent maintenance and measured operation, it is possible to drive about 400 thousand kilometers without the need for major repairs.

Disadvantages

Vortex flaps, which were installed on retrofitted motors, are quite problematic units for owners of cars with such power units under the hood. The axis of the flaps after passing 70-100 thousand kilometers can wear out, which leads to their breakage and getting inside the engine. After that, the power unit ceases to function properly, or at all comes into disrepair. It is best to remove the problematic unit in advance and put plugs instead.

Since removing the plugs requires removal of the intake manifold, it is best to clean this assembly at the same time, together with the EGR valve. It is recommended to remove the valve altogether and plug it physically and programmatically. Once the valve and flaps have been removed, it is best to replace the software so that it works properly with the new set of components.

During operation of the power unit, extraneous sounds and increased noise levels often occur. In this case, it is necessary to pay attention to the crankshaft damper, and if necessary, replace it. Since this node in engines is characterized by a resource of 100 thousand kilometers, the problem is characteristic of almost all.

Among other things, on the M47TUD20 engine you can face the problem of crankshaft failure (here they often burst). Turbochargers are distinguished by a fairly good work, and their resource on average is about 250 thousand kilometers. This figure can be increased if you constantly change the oil to high-quality oil.

Modifications

M47D20O0 / M47D20 – motors produced from 1998 to 2003. This is the first engine from Bavarian engineers, belonging to the M47 series, which was equipped with a Garrett GT1549V turbine. The motor design managed to achieve a compression ratio of 19 to 1. Such indicators provide a maximum power of 136 horsepower, which is developed at 4 thousand rpm, peak torque is developed at 1750 rpm, and is 280 Nm. The motor can be found under the hood of the BMW 320d E46 and 520d E39.

The M47D20U0 / M47D20 is a powertrain produced from 2001 through 2003. This version of the motor develops 116 horsepower at 4,000 rpm. Peak torque of 265 Nm can be achieved at 1,750 rpm. You can find this motor on BMW 318d E46 cars.

M47D20O2 / M47TU2D20 – this engine was in production from 2004 and 2007, as it was intended to replace the M47D20O0. In the design you can find differences in the form of installation of a turbine Garrett GT1752V, as well as the use of electronic engine control unit Bosch EDC16 C35. This power unit meets the norms of the environmental class Euro-4. In BMW 120d E87, 320d E90 and 520d E60 cars, the maximum power and torque are 163 horsepower and 340 Nm respectively.

M47D20U2 / M47TU2D20 – production of this engine started in 204 and ended in 2007. It was produced specifically to replace the obsolete M47D20U1. The power unit complies with Euro-4 environmental standards, thanks to the installation of electronic control unit Bosch EDC16 C35, as well as the use of a turbocharger Garrett GT1749V. At 4 thousand revolutions this engine reaches the maximum power of 122 horsepower, and at 2 thousand you can get the highest torque of 280 Nm. You can find such a motor under the hood of BMW 118d E87 and 318d E90.

Tuning

Increasing the maximum power of the M47TUD20 is not a rather difficult task, as all you need to do is replace the standard software. This will provide an additional 30 horsepower of power.

There is a more extreme way to remove up to 250 horsepower from the engine. This will require purchasing a new Garrett GT2260 turbo from the 530d, installing a large intercooler, and installing fuel injectors from the 535d. The standard exhaust system will have to be rebuilt to a 63 millimeter pipe, plug the EGR valve, and also make a competent adjustment of the software.

Technical specifications

March 1998 was a significant date, as the M47D20 diesel power unit appeared under the hood of the BMW 320d E46 for the first time, which was intended to replace the outdated version of the M41D17 engine. It is a classic four-cylinder inline-four motor that features a cast-iron cylinder block. The cylinder diameter is 84 millimeters, and inside there is a crankshaft that provides a piston stroke of 88 millimeters. The connecting rods stand out with a length of 135 millimeters, while the pistons have a compression height of 47 millimeters. All this construction allows for a displacement of 2 liters.

The manufacturers decided to cover this block with an aluminum cylinder head with two shafts, which ensures the operation of 4 valves on each cylinder. Inlet and exhaust valves do not differ in size – all are 26 millimeters, as well as their stem, which has a thickness of 6 millimeters.

The engine has a direct fuel injection system, the operation of which is provided by a high-pressure fuel pump VP44. The design provides for the presence of an additional supercharger in the form of a turbine, as well as the standard intercooler. The timing mechanism uses a chain, and the engine has an EGR valve and a dual-mass flywheel.

In parallel with this engine, a family of related diesel engines for 6 cylinders BMW M57 was produced. In 2007, production of the power unit was suspended, and it was replaced by an improved four-cylinder diesel engine N47.

This engine is installed on the following models:

BMW X3 (E83)