Ford 2007 F-650 Owner's Manual page 185

Maintenance and Specifications
6. Replace the cap. Turn until tightly installed to prevent coolant loss.
After any coolant has been added, check the coolant concentration (refer
to Severe climates later in this chapter). If the concentration is not
50/50 (protection to –34°F [–36°C]), drain some coolant and adjust the
concentration. It may take several drains and additions to obtain a 50/50
coolant concentration.
Whenever coolant has been added, the coolant level in the coolant
reservoir should be checked the next few times you drive the vehicle. If
necessary, add enough 50/50 concentration of engine coolant and
distilled water to bring the liquid level to the proper level.
If you have to add more than 1.0 quart (1.0L) of engine coolant per
month, have your dealer check the engine cooling system for leaks.
Operating an engine with a low level of coolant can result in engine
overheating and possible engine damage.
Recycled engine coolant
Ford Motor Company does NOT recommend the use of recycled engine
coolant in vehicles originally equipped with Motorcraft Premium Gold
Engine Coolant since a Ford-approved recycling process is not yet available.
Used engine coolant should be disposed of in an appropriate
manner. Follow your community's regulations and standards for recycling
and disposing of automotive fluids.
Engine coolant capacities and part numbers
For cooling system capacities, refer to Refill capacities in this chapter.
For coolant part numbers, refer to Lubricant specifications in this
chapter.
Severe climates
If you drive in extremely cold climates (less than –34°F [–36°C]):
• It may be necessary to increase the coolant concentration
above 50%.
• NEVER increase the coolant concentration above 60%.
• Engine coolant concentrations above 60% will decrease the
overheat protection characteristics of the engine coolant and
may cause engine damage.
• If available, refer to the chart on the coolant container to
ensure the coolant concentration in your vehicle will provide
adequate freeze protection at the temperatures in which you
drive in the winter months.
184
2007 F-650/750 (f67)
Supplement
USA (fus)