Cooling System: Description and Operation

The engine cooling system consists of the:
^ block heater.
^ engine coolant temperature sensor (ECT sensor).
^ fan blade.
^ fan clutch.
^ fan shroud.
^ radiator.
^ radiator cap.
^ radiator coolant recovery reservoir.
^ water thermostat.
^ water pump.
^ water temperature indicator sender unit.

Walter C. Avrea, the owner of patents 3,601,181 and RE 27,965, has granted Ford Motor Company rights with respect to cooling systems covered by these patents.
^ radiator draincock
^ oil filter adapter
^ the radiator allows excess engine heat to be transferred to the air
^ radiator tanks cannot be serviced, replace as an assembly.

The water pump circulates the coolant.

The water thermostat:
^ controls the engine coolant temperature.
^ allows quicker engine warm-up.

The radiator coolant recovery reservoir:
^ holds surplus engine coolant when hot.
^ returns the engine coolant back to the radiator when cool.

The fan blade draws air through the radiator to help cool the engine coolant.

The fan clutch is a thermostatically controlled clutch that controls the fan drive.

The fan motor:
^ operates only when the ignition switch is in the RUN position.
^ will not operate with the switch in the OFF position.

The engine coolant flows:
^ from the lower radiator hose to the water pump.
^ from the water pump to the engine block and the cylinder heads.

A closed water thermostat returns the engine coolant to the water pump; an open water thermostat allows the engine coolant to flow to the radiator.

Recycled coolant:

For vehicles with green coolant:
^ Use Premium Engine Coolant E2FZ-19549-AA or an equivalent engine coolant that meets Ford specification ESE-M97B4-A.
^ Properly recycled engine coolant may be used in vehicles originally equipped with green coolant.

For vehicles with orange coolant:
^ Use Ford Extended Life Engine Coolant F6AZ-19541AA or an equivalent DEX-COOL coolant or a coolant meeting Ford specification WSS-M97B4-D.
^ Do not add conventional green coolant or recycled coolant to your vehicle if originally equipped with orange coolant.

Unsatisfactory coolant materials:
^ alcohol-type antifreeze does not provide adequate water pump lubrication
^ has lower boiling point
^ reduced antifreeze protection
^ alkaline brine solutions will cause serious engine cooling system damage

The water temperature indicator sender unit provides a signal to the temperature gauge.

The optional block heater:
^ electrical heating element is installed in the core plug opening.
^ uses a standard 110V electrical supply
^ keeps the engine coolant warm during cold weather.