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 consist of a tubular coil through which the engine's coolant flows. The tube is fitted with flanges which give off heat to the passing air. The throttle valve in the distribution housing is set so that the blower can force a larger or smaller amount of the air flow through the heat exchanger. Here the air is heated before it is once again mixed with the remaining flow and distributed to the passenger compartment through several different outlets.
The heat exchanger is accessed from the right-hand side of the distribution housing.