2.3.21. Cooling system The engine has a liquid-cooling system. The fresh water pump is a maintenance-free by belt from the crankshaft pulley. z Check the coolant level of the expansion tank by removing the expansion tank filler cap, and add coolant if necessary z When injecting antifreeze solution, first drain out the old coolant from the cylinder block and radiator, and then clean them with cleaning solution. z Be sure to mix soft water with antifreeze solution. Cylinder head cover Cylinder head Cylinder liner To radiator Thermostat Water pump Oil cooler Cylinder block Cooling water pipe From radiator DL06 Diesel Engine Technical Information 32