Lincoln 2014 MKZ Hybrid Owner's Manual page 258

Note: For best results, coolant
concentration should be tested with a
refractometer such as Rotunda tool
300-ROB75240 available from your
dealer. Ford does not recommend the use
of hydrometers or coolant test strips for
measuring coolant concentrations.
Note: Automotive fluids are not
interchangeable. Do not use engine
coolant or antifreeze or windshield washer
fluid outside of its specified function and
vehicle location.
Adding Coolant
WARNINGS
Do not add engine coolant when the
engine is hot. Steam and scalding
liquids released from a hot cooling system
can burn you badly. Also, you can be
burned if you spill coolant on hot engine
parts.
Do not put engine coolant in the
windshield washer fluid container. If
sprayed on the windshield, engine coolant
could make it difficult to see through the
windshield.
To reduce the risk of personal injury,
make sure the engine is cool before
unscrewing the coolant pressure relief cap.
The cooling system is under pressure;
steam and hot liquid can come out
forcefully when the cap is loosened
slightly.
Do not add coolant further than the
MAX mark.
MKZ (CC9)
Maintenance
Note: Do not use stop leak pellets, cooling
system sealants, or additives as they can
cause damage to the cooling or heating
systems. This damage would not be
covered under your vehicle s warranty.
Note: During normal vehicle operation,
the coolant may change color from orange
to pink or light red. As long as the coolant
is clear and uncontaminated, this color
change does not indicate the coolant has
degraded nor does it require the coolant
to be drained, the system to be flushed,
or the coolant to be replaced.
Note: It is very important to use prediluted
coolant meeting the Ford specification in
order to avoid plugging the small coolant
passageways. Use of concentrated
coolant and water may cause coolant
passageway plugging and void the
warranty. See Capacities and
Specifications (page 302).
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