Fig. 4.87. Heat exchanger: 1 – branch; 2 – cold fuel supply; 3 – thermostat; 4 – thermostat housing; 5 – cylinder head; A – diesel fuel; B – coolant
The heat exchanger (Fig. 4.87) is built into the cooling system and secured with bolts on the side of the cylinder head. It ensures reliable operation of the diesel engine even at temperatures below –25°C. Depending on the position of the cooling system thermostat regulator, fuel is supplied through the heat exchanger. At a coolant temperature below +18°C, all fuel goes through the heat exchanger, from +18 to +30°C, the mixing mode is activated, and at higher temperatures, the fuel does not pass through the heat exchanger.
(Original material on the website: «MercedesMan.ru»)