Engine Cooling

The cooling system consists of the following components:

• Block heater
• Engine coolant temperature (ECT) sensor
• Fan blade, fan motor and fan shroud assembly
• Radiator
• Pressure relief cap
• Radiator draincock
• Coolant pump
• Coolant temperature indicator sender unit
• Coolant thermostat
• Oil filter adapter
• Radiator overflow hose

The radiator allows excess engine heat to be transferred to the air.

Radiator tanks cannot be repaired.

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 clean, drinkable water.

To maintain the integrity of the coolant and the cooling system:

• Add Motorcraft Premium Gold Engine Coolant or equivalent meeting Ford specification WSS-M97B51-A1 (yellow color). Use the same coolant that is present in the system. Do not mix coolant types.
• Do not add orange-colored Motorcraft Specialty Orange Engine Coolant or equivalent meeting Ford specification WSS-M97B44-D. Mixing coolants may degrade the coolant's corrosion protection.
• Do not add alcohol, methanol, 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 unless it meets the requirements of Ford specification WSS-M97B51-A1. Not all coolant recycling processes meet these Ford specifications. Use of such coolants can harm the engine and cooling system components.

Fig 1: Coolant Flow Diagram, 4.6L

Courtesy of FORD MOTOR CO.