Engine Cooling: Notes

NOTE: The engine cooling system is filled with Motorcraft® Premium Gold Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of Motorcraft® Premium Gold Engine Coolant. Failure to follow these instructions may result in engine or cooling system damage.

NOTE: 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 . Failure to follow these instructions may damage the engine or cooling system.

NOTE: If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

The cooling system consists of the:

radiator.
cooling fan motor and shroud.
coolant expansion tank.
radiator drain valve.
coolant pump.
thermostat housing.
block heater (if equipped).

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 -37°C (-34°F)

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

NOTE: If cooling system stop leak pellets are used, Motorcraft® Premium Gold Engine Coolant may darken from yellow to golden tan.

Add Motorcraft® Premium Gold Engine Coolant or equivalent (yellow color) meeting Ford specification WSS-M97B51-A1 (yellow color). Do not mix 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 unless it meets the requirements of Ford specification WSS-M97B51-A1. Not all coolant recycling processes meet this Ford specification. Use of such a coolant may harm the engine and cooling system components. Do not mix coolant types.