Engine Coolant Check - Ford MUSTANG MACH 1 2021 Supplement Manual

1. Remove the two sensor wire harness
retainers from the air box studs located
on the front side of the air box.
2. Remove the four studs that fasten the
upper air box housing to the lower air
box housing.
3. Separate the upper air box housing
from the lower air box housing.
4. Loosen the air filter clamp enough to
allow the filter to slip off the housing
easily.
5. Remove the air filter from the air filter
housing.
6. Wipe the newly-exposed air filter outlet
tube clamping area clean to remove
any dirt or debris.
7. Install a new air filter, taking care not
to damage the air filter element. Align
the tab on the closed end of the filter
with the notch in the air filter housing.
8. Tighten the air filter clamp down.
Note: Do not overtighten the clamp or studs
when reinstalling.
9. Reinstall the upper air box piece to the
lower air box piece. Tighten the 4 studs
down.
10. Reinstall the two sensor wire harness
retainers to the mating air box studs.

ENGINE COOLANT CHECK

Check the concentration and level of
engine coolant at the mileage intervals
listed in the scheduled maintenance
information.
Note: Make sure that the level is between
the MIN and MAX marks on the engine and
coolant reservoirs.
Note: Coolant expands when it is hot. The
level could extend beyond the MAX mark.
If the level is at the MIN mark, add coolant
immediately.
Mustang (CZG) Mach 1, enUSA, First-Printing
Maintenance
Maintain the coolant concentration within
48% to 50%, which equates to a freeze
point between -30°F (-34°C) and -34°F
(-37°C).
Note: For best results, test coolant
concentration with a refractometer, such as
Rotunda tool 300-ROB75240, available
from your dealer. We do not recommend
the use of hydrometers or coolant test strips
for measuring coolant concentrations.
Be sure to read and understand
Precautions in your Owner's Manual. If you
do not check the coolant at the
recommended interval, the engine coolant
reservoir could become low or empty. If
the reservoir is low or empty, add coolant
to the reservoir.
Note: Automotive fluids are not
interchangeable. Do not use engine coolant,
antifreeze or windshield washer fluid outside
of its specified function and vehicle
location. For more information about engine
coolant, see the Maintenance chapter of the
Owner s Manual.
Adding Coolant
WARNING: Do not add engine
coolant when the engine is on or the
cooling system is hot. Failure to follow
this instruction could result in personal
injury.
WARNING: Do not put coolant in
the windshield washer reservoir. If
sprayed on the windshield, coolant could
make it difficult to see through the
windshield.
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