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Because the heater core cools the heated coolant from the engine by transferring its heat to the cabin air, it can also act as an auxiliary radiator for the engine. If the radiator is working improperly, the operator may turn the heat on (together with the cabin blower fan placed on full speed, and with the windows opened) in the passenger ...
A larger radiator, heater core inlets, and hoses were new, for improved coolant flow and heater performance. Door lock cylinders and ignition lock switches were revised. The standard 6.6 L (400 cid) V8 engine was slightly detuned, and the 7.5 L V8 was available.
The forward-control cab design was retained, but the doghouse was widened and lengthened to fit the optional V8 Chevrolet small-block engine. Engine cooling was improved with the redesigned doghouse; a larger optional crossflow radiator, and a redesigned front floor tunnel to provide more outside air to the radiator.
a radiator, consisting of many small tubes equipped with a honeycomb of fins to dissipate heat rapidly, that receives and cools hot liquid from the engine; a water pump, usually of the centrifugal type, to circulate the coolant through the system; a thermostat to control temperature by varying the amount of coolant going to the radiator;
In 1939, Nash added a thermostat to its system, making it the first thermostatic automobile climate control system. [4] The Weather Eye "was the first truly good heating and ventilating system." [ 9 ] Additionally, defoggers (defrosters) were incorporated with the introduction of the 3900 series cars that year.
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