MMZ D-240 engine refers to diesel 4-cylinder engines, the cylinder block is reinforced, made of cast iron, the engine capacity of D-240 is 4.75 liters. The power plant is atmospheric, characterized by increased reliability and simplicity of design.
The motor can be easily repaired, the procedure is possible even in the field. As the power plant is diesel, the fuel supply is injection, the engine is provided with the necessary traction and sufficient power. The constructive solution was the use of an inseparable type of working chamber on the engine. In addition, the fuel injection is double, with the formation of vapor of the working fluid in volume and distribution of fuel in the form of a film over the cylinder and piston.
High-strength gray cast iron helps to avoid thermal deformations to the cylinder block of the power unit. The material made the motor heavy, the mass of the MMZ D-240 engine is 430 kg, it paid off itself because the motor has no failures like in similar mechanisms.
Here you can order GENMOT crankshafts for popular models of MMZ engines. You can find more details in the catalog.
Cylinder block material
Power supply system
Operative volume, l
Number of cylinders
Number of valves per cylinder
Piston stroke, mm
Cylinder diameter, mm
No more than 238 liters per hour
D-240 engine cooling system
Closed type liquid cooling is installed on the D-240; therefore, the motor is used on MTZ-80 and MTZ-82 tractors. The closed type of cooling is quite a bold decision, because contact with the environment takes place for a split second and only through the valve. In order not to overheat the engine, the liquid should be at the optimum temperature, which ranges from 80-97 degrees. This indicator is controlled by a thermometer; it is possible to manually adjust the temperature.