2021 LINCOLN NAUTILUS heating

CHECKING THE COOLANT
When the engine is cold, check the
concentration and level of the coolant at the
intervals listed in the scheduled maintenance
information. See Scheduled Maintenance
(page 459).
Note: Make sure that the coolant level is
between the minimum and maximum marks
on the coolant reservoir.
Note: Coolant expands when it is hot. The
level may extend beyond the
MAX mark.
If the coolant level is at or below the
minimum mark, add prediluted coolant
immediately.
Maintain coolant concentration within 48%
to 50%, which equates to a freeze point
between
-29°F (-34°C) and -35°F (-37°C).
Coolant concentration should be checked
using a refractometer. We do not recommend
the use of hydrometers or coolant test strips
for measuring coolant concentration. Adding Coolant WARNING:
Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap with
a thick cloth to prevent the possibility of
scalding and slowly remove the cap.
Failure to follow this instruction could result
in personal injury. 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 add coolant
further than the MAX mark. 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. Note:
Do not use stop leak pellets, cooling
system sealants, or non-specified additives
as they can cause damage to the engine
cooling or heating systems. Resulting
component damage may not be covered by
the vehicle Warranty.
Note: Automotive fluids are not
interchangeable.
It is very important to use prediluted coolant
approved to the correct specification in order
to avoid plugging the small passageways in
the engine cooling system.
See Capacities
and Specifications (page 407). Do not mix
different colors or types of coolant in your
vehicle. Mixing of engine coolants or using
an incorrect coolant may harm the engine or
cooling system components and could void
the vehicle Warranty.
Note: If prediluted coolant is not available,
use the approved concentrated coolant
diluting it to 50/50 with distilled water.
See
Capacities and Specifications (page 407).
Using water that has not been deionized
may contribute to deposit formation,
corrosion and plugging of the small cooling
system passageways.
340
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

To top up the coolant level do the following:
1. Unscrew the cap slowly. Any pressure
escapes as you unscrew the cap.
2. Add enough prediluted coolant to reach
the correct level.
Note: We do not recommend the use of
recycled coolant.
3. Replace the coolant reservoir cap. Turn the cap clockwise until it contacts the
hard stop.
4. Check the coolant level in the coolant reservoir the next few times you drive
your vehicle. If necessary, repeat step 2.
If you have to add more than 1.1 qt (1 L) of
engine coolant per month, have your vehicle
checked as soon as possible. Operating an
engine with a low level of coolant can result
in engine overheating and possible engine
damage.
In case of emergency, you can add a large
amount of water without engine coolant in
order to reach a vehicle service location.
Service your vehicle as soon as possible. Water alone, without engine coolant, can
cause engine damage from corrosion,
overheating or freezing.
Do not use the following as a coolant
substitute, as they can cause engine damage
from overheating or freezing:
•
Alcohol.
• Methanol.
• Brine.
• Any coolant mixed with alcohol or
methanol antifreeze.
Do not add extra inhibitors or additives to
the coolant. These can be harmful and
compromise the corrosion protection of the
coolant.
Severe Climates
If you drive in extremely cold climates, you
may need to increase the coolant
concentration above 50%. Note:
A coolant concentration of 60%
provides improved freeze point protection.
Coolant concentrations above 60% decrease
the overheat protection characteristics of
the coolant and could cause engine
damage.
If you drive in extremely hot climates, you
may need to decrease the coolant
concentration to 40%.
Note: Coolant concentrations below 40%
decrease the freeze and corrosion protection
characteristics of the coolant and could
cause engine damage.
Coolant Change
Change the coolant at specific mileage
intervals. Refer to the scheduled
maintenance information.
See Normal
Scheduled Maintenance (page 463).
Note: Dispose of used coolant in the
appropriate manner.
Follow your community's regulations and
standards for recycling and disposing of
automotive fluids.
341
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

3. If this is not possible, wait for a short
period of time for the engine to cool.
4. Check the coolant level. If the coolant level is at or below the minimum mark,
add prediluted coolant immediately.
5. When the engine temperature cools, you
can re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
Note: Driving your vehicle without repair
increases the chance of engine damage.
Engine Coolant Temperature
Management (If Equipped) WARNING:
To reduce the risk of
crash and injury, be prepared that the
vehicle speed may reduce and the vehicle
may not be able to accelerate with full
power until the coolant temperature
reduces. If you tow a trailer with your vehicle, the
engine may temporarily reach a higher
temperature during severe operating
conditions, for example ascending a long or
steep grade in high ambient temperatures.
At this time, you may notice the coolant
temperature gauge moves toward the red
zone and a message may appear in the
information display.
You may notice a reduction in vehicle speed
caused by reduced engine power in order
to manage the engine coolant temperature.
Your vehicle may enter this mode if certain
high-temperature and high-load conditions
take place. The amount of speed reduction
depends on vehicle loading, grade and
ambient temperature. If this occurs, there is
no need to stop your vehicle. You can
continue to drive.
The air conditioning may automatically turn
on and off during severe operating
conditions to protect the engine from
overheating. When the coolant temperature
decreases to the normal operating
temperature, the air conditioning turns on. If the coolant temperature gauge moves fully
into the red zone, or if the coolant
temperature warning or service engine soon
messages appear in your information display,
do the following:
1.
Stop your vehicle as soon as it is safe to
do so. Fully apply the parking brake, shift
into park (P) or neutral (N).
2. Leave the engine running until the coolant temperature gauge needle
returns to the normal position. If the
temperature does not drop after several
minutes, follow the remaining steps.
3. Switch the engine off and wait for it to cool. Check the coolant level.
4. If the coolant level is at or below the minimum mark, add prediluted coolant
immediately.
5. If the coolant level is normal, restart the engine and continue.
343
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

TIRE SEALANT AND INFLATOR KIT
COMPONENTS
Air compressor (inside)
A
Selector switch
B
On and Off button
C
Air pressure gauge
D
Sealant bottle and canister
E
Dual purpose hose: air and repair
F
Tire valve connector
G
Accessory power plug
H
Casing/housing
I
Bike/raft/sports ball adapters
J
USING THE TIRE SEALANT AND
INFLATOR KIT
Tips for use of the kit
To ensure safe operation of the kit:
• Before operating the kit, make sure your
vehicle is safely off the road and away
from moving traffic.
• Do not remove any foreign objects, such
as nails or screws, from the tire. •
Do not allow the compressor to operate
continuously for more than 15 minutes.
This will help prevent the compressor
from overheating.
• Only use the kit when the ambient
temperature is between -22°F (-30°C) and
158°F (70°C).
• Only use the sealing compound before
the use-by date. The use-by date is on a
label on the sealant canister and can be
seen through the rectangular viewing
window on the bottom of the compressor.
Check the use-by date regularly and
replace the canister when the sealant
expires.
Note: Sealant compound contains latex. Use
appropriate precautions to avoid any allergic
reactions. When inflation only is required for
a tire or other objects, the selector
must be in the Air position.
What to do when a tire is punctured
A tire puncture within the tire's tread area
can be repaired in two stages with the kit.
379
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Tire Sealant and Inflator KitE175977 E175978

If your information display resets prematurely
or becomes inoperative, you should perform
the oil change interval at six months or
5,000 mi (8,000 km) from your last oil
change. Never exceed one year or 10,000 mi
(16,000 km)
between oil change intervals.
You can drive high performance vehicles in
such a way that may lead to higher oil
consumption including extended time at high
engine speeds, high loads, engine braking,
hard cornering maneuvers, track and off-road
usage. Under these conditions, oil
consumption of approximately 1 quart per
500 miles (1 liter per 800 km) is possible.
Check the engine oil level at every refueling
and adjust to maintain proper levels to avoid
engine damage.
It is important to rely upon your dealership
to properly diagnose and repair your vehicle. We strongly recommend only using our
genuine or our authorized re-manufactured
replacement parts engineered for your
vehicle.
Additives and Chemicals
We do not recommend using chemicals or
additives not approved by us as part of your
vehicle
’s normal maintenance. Please consult
your warranty information.
Oils, Fluids and Flushing
In many cases, fluid discoloration is a normal
operating characteristic and, by itself, does
not necessarily indicate a concern or that the
fluid needs to be changed. Have discolored
fluids that also show signs of overheating or
foreign material contamination checked
immediately. Make sure to change the vehicle
’s oils and
fluids at the specified intervals or in
conjunction with a repair. Flushing is a viable
way to change fluid for many vehicle
sub-systems during scheduled maintenance.
It is critical that systems are flushed only with
new fluid that is the same as that required
to fill and operate the system or using our
approved flushing chemical.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections. Check Every Month
The air filter restriction gauge. 1
The engine oil level.
Function of all interior and the exterior lights.
460
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Scheduled Maintenance

Garage Door Opener Radio
Frequencies.................................................176
FCC and RSS-210 Industry Canada Compliance.......................................................176
General Maintenance Information...........459 Multi-Point Inspection........................................462
Owner Checks and Services...........................460
Protecting Your Investment.............................459
Why Maintain Your Vehicle?............................459
Why Maintain Your Vehicle at Your Dealership?......................................................459
Glasses Holder
..............................................185
Locating the Glasses Holder............................185
Global Opening and Closing......................130 Switching Global Closing On and Off............130
Switching Global Opening On and Off..........130
Using Global Closing..........................................130
Using Global Opening.......................................130
What Is Global Opening and Closing.............130
Glossary of Tire Terminology
....................369
H
Headlamp Adjusting See: Adjusting the Headlamps.......................348
Headlamps.......................................................119 Headlamp Indicators...........................................119 Switching Headlamp Exit Delay On and
Off........................................................................\
119
Using the High Beam Headlamps...................119
Headlamps – Troubleshooting..................120 Headlamps – Frequently Asked
Questions.........................................................120
Heated Seats..................................................163 Heated Seat Precautions..................................163
Switching the Heated Seats On and Off.......164
Heating See: Climate Control..........................................154
Hill Start Assist
..............................................225
Hill Start Assist – Troubleshooting................225
Hill Start Assist Precautions......................225
Hill Start Assist – Troubleshooting..........225 Hill Start Assist – Information
Messages.........................................................225
Hood Lock See: Opening and Closing the Hood............332
Horn...................................................................113
How Does 911 Assist Work
...........................73
How Does Active Park Assist Work.........246
How Does Adaptive Cruise Control With Stop and Go Work.....................................253
How Does All-Wheel Drive Work..............214
How Does Auto Hold Work
.......................226
How Does Blind Spot Information System Work..............................................................273 How Does Cross Traffic Alert Work.........276
How Does Drive Mode Control
Work..............................................................264
How Does Driver Alert Work.....................287
How Does Easy Entry and Exit Work.........99
How Does Hill Start Assist Work..............225
How Does Pre-Collision Assist Work......279
How Does Stability Control Work............229 Electronic Stability Control..............................
229
How Does the 360 Degree Camera Work..............................................................243
How Does the Garage Door Opener Work...............................................................173
How Does the Lane Keeping System Work..............................................................265
How Does the Memory Function Work................................................................171
How Does the Personal Safety System Work................................................................62
How Does the Rear Occupant Alert System Work
...............................................................169
How Does the Safety Canopy™ Work........65
How Does Traction Control Work
............228
How Does Trailer Sway Control Work..............................................................304
How Do Personal Profiles Work................447 Recalling and Changing a Profile...................447
How Do the Front Airbags Work................63
562
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Index