scheduled maintenance guide. The coolant
concentration should be maintained at 50/50 coolant
and water, which equates to a freeze point of -36°C
(-34°F). Coolant concentration testing is possible
with a hydrometer or antifreeze tester (such as the
Rotunda Battery and Antifreeze Tester, 0014–R1060).
The level of coolant should be maintained at the“cold
full”of“cold fill range”level in the coolant reservoir.
If the level falls below, add coolant per the
instructions in theAdding Engine Coolantsection.
Your vehicle was factory-filled with a 50/50 engine
coolant and water concentration. If the
concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not
work properly.A50–50 mixture of coolant and
water provides the following:
•freeze protection down to -36°C (-34°F).
•boiling protection up to 129°C (265°F).
•protection against rust and other forms of
corrosion.
•an accurate temperature readout from the
engine coolant gauge.
When the engine is cold,
check the level of the
engine coolant in the
reservoir.
•The engine coolant
should be at the“cold
fill level”as listed on
the engine coolant
reservoir.
•Refer to the scheduled maintenance guide for
service interval schedules.
•Be sure to read and understandPrecautions when
servicing your vehiclein this chapter.
If the engine coolant has not been checked at the
recommended interval, the engine coolant reservoir
may become low or empty. If the reservoir is low or
empty, add engine coolant to the reservoir. Refer to
Adding engine coolantin this chapter.
2004 Mustang(mus)
Supplement
USA English(fus)
Maintenance
15
