Lesson 1/Learning Event 1
FIGURE 2. LIQUID-COOLED ENGINE.
Liquid-Cooled. Liquid-cooled engines have passageways or a water jacket around the cylinders and in the head
to hold a liquid coolant. A pump is used to circulate the coolant through the engine water jackets and an
external container called the radiator. Liquid-cooled engines also have a fan, but it is for circulating air between
cooling fins on the radiator to carry heat away from the liquid coolant.