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The BMW N57 is a family of aluminium, turbocharged straight-6 common rail diesel engines. The engines utilize variable geometry turbochargers and Bosch piezo-electric injectors. [1] The engine jointly replaced the M57 straight-6 and M67 V8 engines. In 2015 the N57 started to be replaced with the B57 engine, beginning with the G11 730d.
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.
Aside from the belt/chain itself, also common is a failure of the tensioner, and/or the various gear and idler bearings, causing the belt/chain to derail. Furthermore, in engines where the timing belt drives the water pump, failure of the water pump can cause the pump to seize, which can break the timing belt or chain.
The B57 replaced the previous N57 diesel engine, and was first introduced in the G11 7 Series. The B57 is available in configurations of up to 4 turbochargers, that operate in a double-series layout. [4] In addition to BMW's own brand vehicles, the BMW B57 is also used in a diesel variant of the Ineos Grenadier. [5]
Timing chain failure may call for engine replacement or a costly repair. The most seriously affected units which require the most extensive repairs were produced from 01.03.2007 to 05.01.2009. [4] However, there have been reports of timing chain failure in BMW diesel engines manufactured until 2015.
The BMW N20 is a 1.6 and 2.0 L (98 and 122 cu in) turbocharged four-cylinder DOHC petrol engine with variable valve lift and variable valve timing which replaced the N53 (or BMW N52 in some markets) and was produced from 2011 to 2017 by BMW. Although the N20 is a four-cylinder engine, it is considered a replacement for the naturally aspirated ...
The BMW N54 is a twin-turbocharged straight-six petrol engine that was produced from 2006 to 2016. [1] It is BMW's first mass-produced turbocharged petrol engine and BMW's first turbocharged petrol engine since the limited-production BMW M106 was discontinued in 1986.
The majority of treatment is aimed at preserving heart function and treating heart failure symptoms. [3] Light chain (AL-CM) Treatment: Since the cause of this subtype of cardiac amyloidosis is the excessive production of free light chains, the major goal of treatment is the reduction in concentration of light chains. [5]