Cooling System: Description and Operation

The cooling system components are the:
^ block heater
^ fan blade
^ fan clutch
^ fan shroud
^ radiator
^ pressure relief cap
^ radiator draincock
^ water pump
^ water temperature indicator sender unit
^ water thermostat
^ oil filter adapter
^ the radiator allows excess engine heat to be transferred to the air.
^ radiator tanks cannot be serviced, replace as an assembly.
^ Upper radiator hose.
^ lower radiator hose.

The water pump circulates the coolant.

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

The degas bottle:
^ provides a location for service fill.
^ contains coolant expansion and system pressurization.
^ provides air separation during operation.
^ replenishes the engine coolant to the system.

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 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.

For vehicles with green coolant:
^ Use Ford Premium Engine Coolant E2FZ-19549-AA or an equivalent engine coolant that meets Ford Specification ESE-M97B44-A.
^ Ford Premium Engine Coolant protects all metal and rubber in Ford cooling systems for 3 years or 80,000 km (30,000 miles).
^ 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-19544-AA or an equivalent DEX-COOL(R) coolant or a coolant meeting Ford specification WSS-M97B44-D.
^ Ford Extended Life Engine Coolant is a silicate-free coolant that does not need to be replaced for 6 years or 240,000 km (150,000 miles), whichever occurs first.
^ 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.