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This causes excessive buildup in the cooler matrix, and when the engine warms up these solid chunks of buildup can detach from the EGR cooler and get sucked into the plastic intake tube, melting holes in the intake tube, causing a massive boost leak and in very rare cases an engine fire. BMW has issued a recall to over 1.6 million vehicles in ...
Water Injection and cooled exhaust gas recirculation (EGR) could be seen as competitive technologies: it has been demonstrated that at medium load a 40-50 % Water-to-Fuel Ratio (WFR) with Port Water Injection (PWI) has the same effect as an EGR-rate of 10%, which is seen as relatively limited even for petrol engines. [15]
The goal of EGR is thus to reduce NO x production by reducing the combustion temperatures. In modern diesel engines, the EGR gas is usually cooled with a heat exchanger to allow the introduction of a greater mass of recirculated gas. However, uncooled EGR designs do exist; these are often referred to as hot-gas recirculation (HGR).
BMW is recalling more than 917,000 older cars and SUVs in the U.S. — most for a third time — to fix a problem that can cause engine compartment fires. The recall covers many 3 Series, 5 Series ...
BMW is recalling 720,796 vehicles due to an issue involving a faulty seal on the water pump, which may cause a fire. The recall spans 12 models from the 2012 to 2018 model years, including the Z4 ...
11 different BMW models with four-cylinder engines from models years 2012–2018 are subject to the recall. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 ...
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.
Cooling is also needed because high temperatures damage engine materials and lubricants and becomes even more important in hot climates. Internal-combustion engines burn fuel hotter than the melting temperature of engine materials, and hot enough to set fire to lubricants.
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