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Remix of "The EGR system is designed to reduce harmful NOx. Remix of "How a thermostat works, How a pressure cap. TRANSMISSION. Type of gears DIFF. DRIVELINE. CLUTCH. Gearbox safety. TYPE OF GEARS. LUBRICANTS. Viscosity. IMI question. Fuel. Fuel sistem. 4 stroke engine. DIESEL ENGINES. Engine configurations. Combustion chamber dessign. 1. Smaller flywheel (less weight), 2.Engine fires more t. Electrics.