Cooling System: Description and Operation
Engine CoolingCAUTION: Vehicle cooling systems are filled with Motorcraft Premium Gold Engine Coolant with Bittering Agent (US only) VC-7-B (US), CVC-7-A (Canada); or equivalent (yellow color) meeting Ford specification WSS-M97B51-A1. Always fill the cooling system with the same type of coolant that was drained from the system. Do not mix coolant types.
The cooling system consists of these components:
^ Block heater
^ Bypass tube
^ Degas bottle
^ Degas bottle cap
^ Fan blade
^ Electronic fan clutch
^ Fan shroud
^ Radiator
^ Radiator draincock
^ Upper and lower radiator hoses
^ Bypass coolant hose
^ Coolant pump
^ Coolant thermostat The coolant pump:
^ circulates the coolant.
The coolant thermostat:
^ controls coolant temperature.
^ allows quicker engine warm-up.
The degas bottle:
^ holds surplus coolant when hot.
^ de-aerates the system reducing hot spots.
^ is the location for service fill.
^ allows coolant expansion and system pressurization.
^ replenishes coolant to the system.
The fan blade:
^ draws air through the radiator to help cool the system coolant.
The fan clutch:
^ is an electronically controlled clutch that controls the fan speed.
The radiator:
^ cannot be serviced. Install a new radiator.
^ allows excess heat to be transferred to the air.
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.
CAUTION: Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle.
When adding engine coolant, use a 50/50 mixture of engine coolant and distilled water.
To maintain the integrity of the coolant and the cooling system:
^ Add Motorcraft Premium Gold Engine Coolant. Use the same type of coolant that is present in the system. Do not mix coolant types.
^ Do not add orange-colored Motorcraft Specialty Orange Engine Coolant. Mixing coolants may degrade the coolant's protection rating.
^ Do not add alcohol, methanol or brine or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
^ Do not mix with recycled coolant. Use of such a coolant may harm the engine and cooling system components.
Coolant Flow Diagram, Expedition and Navigator without Auxiliary Heater:
Coolant Flow Diagram, Expedition and Navigator with Auxiliary Heater:
Coolant Flow Diagram, Expedition EL and Navigator L with Auxiliary Heater:
