Engine Cooling
The engine cooling system consists of the:
- block heater.
- fan blade and clutch.
- fan shroud.
- coolant expansion tank.
- thermostat.
- thermostat housing assembly (4.0L SOHC).
- coolant pump.
- radiator.
- radiator cap.
- radiator hose.
- heater tube assembly (4.0L SOHC).
The radiator allows excess engine heat to be transferred to the air.
The coolant pump forces coolant to flow through the cooling system.
The thermostat is a control valve actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit and returns to the coolant pump. When the thermostat is opened, coolant is allowed to flow through the radiator circuit in order to transfer engine generated heat to the outside air.
The radiator cap serves as the location for filling the cooling system and provides for a controlled pressure in the cooling system. When the pressure reaches a predetermined level, a valve in the radiator cap opens to allow coolant to flow into the coolant expansion tank. As the engine cools, a valve in the radiator cap allows for coolant to flow from the coolant expansion tank back into the radiator.
The coolant expansion tank holds surplus coolant, allows for coolant expansion and replenishes coolant to the cooling system. It is equipped with a non-pressurized cap which allows coolant to be added to keep it filled to prescribed levels.
The electronically controlled fan clutch is controlled by the PCM based upon requests for airflow to cool the engine, transmission and A/C condenser. If no cooling is required, the electronics permit the fan to spin at a slower speed yielding improved fuel economy.
The optional block heater keeps the engine coolant warm during cold weather. The electrical heating element is installed in a core plug opening and uses a standard 110V electrical supply.
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 coolant expansion tank.
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. 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 or methanol 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.
- the addition of Cooling System Stop Leak Pellets darkens Motorcraft Premium Gold Engine Coolant from yellow to golden tan.
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 8620 | Upper radiator hose |
| 4 | 8100 | Radiator cap |
| 5 | 8286 | Lower radiator hose |
| 6 | 18472 | Heater inlet tube assembly |
| 7 | 8592 | Thermostat housing outlet |
| 8 | 8592 | Thermostat housing |
| 9 | 8548 | Coolant bypass hose |
| 10 | 18C266 | Heater hose assembly |
| 11 | 18476 | Heater core |
| 12 | 8501 | Coolant pump |
| 13 | 6019 | Engine front cover |
| 14 | 6010 | Engine block |
| 15 | 6051 | Cylinder head gasket |
| 16 | 6049 | Cylinder head |
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 8620 | Upper radiator hose |
| 4 | 8100 | Radiator cap |
| 5 | 8286 | Lower radiator hose |
| 6 | 18472 | Heater inlet tube assembly |
| 7 | 8592 | Thermostat housing outlet |
| 8 | 8592 | Thermostat housing |
| 9 | 8548 | Coolant bypass hose |
| 10 | 18C266 | Heater hose assembly |
| 11 | 18476 | Heater core |
| 12 | 6A642 | Oil cooler |
| 13 | 6N867 | Oil cooler outlet hose |
| 14 | 8501 | Coolant pump |
| 15 | 6019 | Engine front cover |
| 16 | 6010 | Engine block |
| 17 | 6051 | Cylinder head gasket |
| 18 | 6049 | Cylinder head |
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 8620 | Upper radiator hose |
| 4 | 8100 | Radiator cap |
| 5 | 8286 | Lower radiator hose |
| 6 | 18472 | Heater core outlet hose |
| 7 | 18472 | Heater core inlet tube assembly |
| 8 | 8592 | Thermostat housing outlet |
| 9 | 8575 | Thermostat |
| 10 | 8592 | Thermostat housing |
| 11 | 8548 | Coolant bypass hose |
| 12 | 18B402 | Heater core hose and tube assembly |
| 13 | 18K470 | Auxiliary heater and A/C tube assembly |
| 14 | 18476 | Heater core |
| 15 | 8501 | Coolant pump |
| 16 | 6019 | Engine front cover |
| 17 | 6010 | Engine block |
| 18 | 6051 | Cylinder head gasket |
| 19 | 6049 | Cylinder head |
| 20 | 18476 | Auxiliary heater core |
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 8620 | Upper radiator hose |
| 4 | 8100 | Radiator cap |
| 5 | 8286 | Lower radiator hose |
| 6 | 18472 | Heater core outlet hose |
| 7 | 18472 | Heater core inlet tube assembly |
| 8 | 8592 | Thermostat housing outlet |
| 9 | 8575 | Thermostat |
| 10 | 8592 | Thermostat housing |
| 11 | 8548 | Coolant bypass hose |
| 12 | 18B402 | Heater core hose and tube assembly |
| 13 | 18K470 | Auxiliary heater and A/C tube assembly |
| 14 | 18476 | Heater core |
| 15 | 6A642 | Oil cooler |
| 16 | 6N867 | Oil cooler outlet hose |
| 17 | 8501 | Coolant pump |
| 18 | 6019 | Engine front cover |
| 19 | 6010 | Cylinder block |
| 20 | 6051 | Cylinder head gasket |
| 21 | 6049 | Cylinder head |
| 22 | 18476 | Auxiliary heater core |
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 18472 | Heater core inlet hose |
| 4 | 8100 | Radiator cap |
| 5 | 8620 | Upper radiator hose |
| 6 | 8501 | Coolant pump |
| 7 | 8286 | Lower radiator hose |
| 8 | 18465 | Heated PCV fitting inlet hose |
| 9 | 18472 | Heater core outlet hose |
| 10 | 18465 | Heated PCV fitting outlet hose |
| 11 | 9A474 | Heated PCV fitting |
| 12 | 8A520 | Coolant crossover manifold assembly |
| 13 | 6010 | Cylinder block |
| 14 | 6881 | Oil filter adapter |
| 15 | 6051 | Cylinder head gasket |
| 16 | 18663 | Heater core outlet tube assembly |
| 17 | 6049 | Cylinder head |
| 18 | 18C553 | Heater core hose assembly |
| 19 | 18476 | Heater core |
| Item | Part Number | Description |
|---|---|---|
| 1 | 8A080 | Coolant expansion tank |
| 2 | 8005 | Radiator |
| 3 | 18472 | Heater core outlet hose |
| 4 | 8100 | Radiator cap |
| 5 | 18K470 | Heater core hose assembly |
| 6 | 8620 | Upper radiator hose |
| 7 | 8501 | Coolant pump |
| 8 | 8286 | Lower radiator hose |
| 9 | 18K470 | Auxiliary heater and A/C tube assembly |
| 10 | 18465 | Heated PCV fitting outlet hose |
| 11 | 18465 | Heated PCV fitting inlet hose |
| 12 | 9A474 | Heated PCV fitting |
| 13 | 8A520 | Coolant crossover manifold assembly |
| 14 | 6010 | Cylinder block |
| 15 | 6881 | Oil filter adapter |
| 16 | 6051 | Cylinder head gasket |
| 17 | 6049 | Cylinder head |
| 18 | 18663 | Heater core outlet tube |
| 19 | 18476 | Heater core |
| 20 | 18476 | Auxiliary heater core |