Heat EXCHANGER
In order to heat the air in the passenger compartment, the heating system uses the heat that is generated by the engine. The heat exchanger is connected to the cooling system for the engine. The outlet connection for the heat exchanger is located directly on the engine at the point where the pressure and temperature of the coolant are highest. The coolant flows through the cooling ducts for the engine block and on into the heat exchanger. The return flow is connected to the return pipe on the suction side of the water pump. The heat exchanger comprises a pipe loop through which the engine coolant flows. The pipe has flanges that provide heat to the airflow. The shutters in the distribution housing are set so that the blower fan can direct a larger or smaller portion of the airflow through the heat exchanger. The air is heated there before being mixed again with the remaining flow and distributed to the passenger compartment through a number of different vents.