Cooling System: Description and Operation
Engine Cooling
NOTICE: Always fill the cooling system with the manufacturer's specified coolant. If a non-specified coolant has been used the cooling system must be chemically flushed. Refer to Cooling System Flushing Cooling System Flushing. Failure to follow these instructions may damage the cooling system or engine.
The cooling system components include the following:
- Block heater
- Coolant pump
- Cooling fan blade
- Cooling fan clutch
- Cooling fan shroud
- Cylinder Head Temperature (CHT) sensor
- Degas bottle
- Pressure relief cap
- Radiator
- Radiator draincock
- Thermostat
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. A coolant concentration of 50% will provide freeze point protection down to -36°C (-33°F).
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). Do not mix coolant types.
- do not add/mix different coolant types. 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. Use of such coolants may harm the engine and cooling system components. Do not mix coolant types.
Coolant Flow Diagram, 4.6L (2V) without Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
Coolant Flow Diagram, 4.6L (2V) with Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
Coolant Flow Diagram, 5.4L (2V) without Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
Coolant Flow Diagram, 5.4L (2V) with Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
Coolant Flow Diagram, 6.8L (2V) without Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
Coolant Flow Diagram, 6.8L (2V) with Auxiliary Heat
NOTE: Black arrows indicate hot, white arrows indicate cold.
