FUSO 4M4 – COOLING – STRUCTURE AND OPERATION – Thermostat

• The thermostat is a bottom bypass type that uses a wax-filled pellet as its flow-regulating element. When the wax is heated, it melts from solid to liquid, changing its total volume. This allows the valve to open or close in accordance with the coolant temperature, regulating and adjusting the flow of coolant to the radiator and to the water pump (bypassing the radiator).

 

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