BMW M57
| BMW M57 | |
|---|---|
 |
|
| Overview | |
| Manufacturer | BMW |
| Production | 1998–present |
| Combustion chamber | |
| Configuration | Inline-6 Diesel engine |
| Displacement | 2497 cm3 2926 cm3 2993 cm3 |
| Cylinder bore | |
| Piston stroke | 80 × 82,8 mm 84 × 88 mm 84 × 90 mm |
| Cylinder block alloy | Cast iron Aluminum (TÜ2 onwards) |
| Valvetrain | DOHC |
| Compression ratio | 16,5-18:1 |
| Combustion | |
| Turbocharger | 1 or 2 BorgWarner turbochargers with intercooler |
| Fuel system | Common-Rail-Injection |
| Management | Bosch DDE 5.0 |
| Fuel type | Diesel fuel |
| Cooling system | Water-cooled |
| Output | |
| Power output | 120-210 kW |
| Torque output | 350-580 N·m |
| Chronology | |
| Predecessor | BMW M51 |
| Successor | BMW N57 |
The BMW M57 is a straight-6 diesel engine produced from 1998. It is produced in the upper Austrian engine plant in Steyr.
The M57 is a water-cooled and turbocharged inline six cylinder diesel engine with common-rail-injection. It was revised twice during its production time. It is based on its predecessor M51. The block and the crankcase of the first M57 engines and the TÜ (Technische Überarbeitung = revision) engines are made of cast iron, TÜ2 engines are made of aluminium instead. The combustion chamber was also changed in the TÜ2. The injection pressure is 1350 bar in the 2.5l engine, all other engines use a pressure of 1600 bar instead. For fuel injection, magnetic injectors are used, except from the TÜ2 OL and TOP engines, which make use of piezo injectors. The common-rail-system is made by Bosch and also controlled by a Bosch DDE 5 ECU. The M57 is equipped with one variable geometry turbocharger and an intercooler, except from the M57D30TÜTOP, which has a BorgWarner KP39 high-pressure and a K26 low-pressure turbocharger. The compression ratio reaches from 16,5:1 to 18:1, M57 engines with higher power output and more than one turbocharger have a lower compression ratio. Every cylinder has two inlet and two outlet valves as well as two chain-driven overhead camshafts.
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