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Engine and Secondary Cooling
System Refill Procedure
The following procedure should be used
when refilling the engine or secondary
cooling systems after it has been drained
or become extremely low:
1. Before you remove the cap, turn the
engine off and let it cool.
2. When the engine is cool, wrap a thick
cloth around the cap. Slowly turn cap
counterclockwise until pressure begins
to release.
3. Step back while the pressure releases.
4. When you are sure that all the pressure
has been released, use the cloth to turn
it counterclockwise and remove the
cap.
5. Slowly add prediluted engine coolant
to the coolant reservoir until the
coolant level is within the minimum
and maximum range as listed on the
reservoir.
6. Reinstall the pressure relief cap.
7. Start and run the engine at 2000 rpm
for 2 minutes.
8. Shut engine off, and remove the
pressure relief cap as previously
outlined.
9. If required, add prediluted engine
coolant to the coolant reservoir until
the coolant level is within the minimum
and maximum range as listed on the
reservoir.
10. Engine cooling system: Repeat
Step 5 until the coolant level has
stabilized (is no longer dropping after
each step) and the upper radiator
hose at the radiator is warm to the
touch (indicating that the engine
thermostat is open and coolant is
flowing through the radiator).
11. Check the secondary cooling system.
Repeat Step 5 until the coolant level
has stabilized (is no longer dropping
after each step) and the lower
passenger side of the secondary
radiator is warm to the touch
(indicating secondary thermostat is
open and coolant is flowing through
the entire system).
12. Reinstall the pressure relief cap. Shut
the engine off and let it cool.
13. Check the coolant level in the
reservoir before you drive your vehicle
the next few times.
14. If necessary, add prediluted engine
coolant to the coolant reservoir until
the coolant level is within the
minimum and maximum range as
listed on the reservoir. After any
coolant has been added, check the
coolant concentration.
Recycled Coolant
We do not recommend the use of recycled
coolant as an approved recycling process
is not yet available.
Dispose of used engine coolant in an
appropriate manner. Follow your
community’s regulations and standards
for recycling and disposing of automotive
fluids.
Severe Climates
If you drive in extremely cold climates:
• It may be necessary to increase the
coolant concentration above 50%.
• A coolant concentration of 60%
provides improved freeze point
protection. Coolant concentrations
above 60% decrease the overheat
protection characteristics of the
coolant and may cause engine
damage.
335
Super Duty (TFE) Canada/United States of America, enUSA, First Printing
Maintenance
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