The N57D30TOP engine is a diesel engine with six cylinders, in-line configuration. Production of power units began in 2008. It is characterized by a vertical arrangement of valves, glow plugs made of ceramic, the presence of a turbocharger with the possibility of changing the geometry. Additional features were the placement of a new crankcase made of aluminum and equipped with a piezoelectric injector from Bosch.
This version of the motor was supplied with an injection pressure of 2 thousand bar. This motor was originally designed as a criterion for equipping cars based on the turbocharged diesel engine M57TU2D30 with a volume of 3 liters. It also provides an in-line arrangement of six cylinders with the same diameter and stroke of the piston, respectively received the same volume.
Engine specifications N57D30TOP
| Power, hp. | 306 – 381 |
| Fuel type | Diesel fuel |
| Volume, cm*3 | 2993 |
| Maximum torque, N*m (kg*m) at rpm. | 600 (61) / 2500; 630 (64) / 1500; 630 (64) / 2500; 740 (75) / 2000 |
| Fuel consumption, l/100 km | 5.9 – 7.5 |
| Engine type | In-line, 6-cylinder |
| Additional information about the engine | High-precision Common Rail fuel injection, digital engine management system |
| CO2 emission, g/km | 157 – 198 |
| Cylinder diameter, mm | 84 |
| Number of valves per cylinder | 4 |
| Maximum power, hp (kW) at rpm. | 306 (225) / 4400; 313 (230) / 4300; 313 (230) / 4400; 381 (280) / 4400 |
| Blower | Twin turbochargingTurbine |
| Start-stop system | optionally |
| Compression ratio | 16.5 |
| Piston stroke, mm | 90 |
Advantages
Almost all materials used for the production of N57D30TOP motors are aluminum. The presence of variable geometry in the supercharger makes it possible to obtain a reduced turbo, which entails a quicker motor response. This is unlike engines that have a fixed geometry supercharger.
The power supply system has been fully optimized to achieve optimum performance. The engines were equipped with a Common Rail system supplemented by piezoelectric injectors. In combination with the stratified charge injection technique, this made it possible to achieve better combustion performance with minimal waste. As a consequence, all of these refinements have resulted in improved engine efficiency. The application of these techniques has also improved thermal efficiency. This means that with increased performance, fuel consumption is only 10 percent higher. In normal operation, such engines have made it possible to reduce fuel consumption by 7-8 percent.
These powertrains have been developed to meet Euro 5 environmental standards. But, there are models with additional options in the form of a leasing package capable of reducing emissions even further. Since 2014, such motor models have been introduced as compliant with Euro 6 standards.
Disadvantages
The first problem noted by owners of cars with these motors is the swirl flaps. Everyone knows that in the M-series there are very often cases of flaps flying into the engine. These motors do not suffer from this, but the flaps can get very dirty. This leads to interruptions in the even operation of the motor and the appearance of errors. The reason for these problems is simple – the EGR valve. It should be cleaned from time to time, or removed at all at the program level. It is better to do it in advance to avoid complete clogging of the manifold with dirt after 100 thousand mileage.
These motors are not characterized by quiet operation, and extraneous sounds as well as noises are often observed in them. This defect is similar to the previous version of the power units, the N47. The first cause of extraneous sounds is the early failure of the crankshaft damper and the need to replace it after 100 thousand kilometers of mileage. Additional noise can occur in the rear of the engine after 200 thousand kilometers of mileage. These are the primary signs that it is necessary to check the timing chain and replace it if necessary.
The turbine on such motors is characterized by reliability and normal service life. With proper operation, it can work for more than 200 thousand kilometers. To avoid possible problems with the engine and maximize its service life, it is necessary to change the oil on time and choose only a quality fluid for filling. Only good fuel should be used and the power unit should be regularly serviced.
Tuning
Motors of this series, which were equipped with a single turbo, can be tuned up to 300 horsepower with a single block firmware. Power units with downpipe can be tuned up to 320 horses. Engines of the N57TU series are capable of producing 15 horsepower more, so this line is considered one of the most profitable for chip tuning.
Twin-turbo diesel engines can be boosted to 360 horsepower or more with downpipe and block firmware. With a similar set of actions, the N57TU motors can produce more than 380 horsepower.
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