2022 LINCOLN NAUTILUS engine coolant

Engine coolant reservoir. See Checking the Coolant (page 347).A
Engine oil dipstick. See Engine Oil Dipstick Overview (page 345).B
Engine oil filler cap. See Adding Engine Oil (page 346).C
Brake fluid reservoir. See Checking the Brake Fluid (page 220).D
Battery. See Changing the 12V Battery (page 353).E
Power distribution box. See Accessing the Under Hood Fuse Box (page 323).F
Air filter. See Changing the Engine Air Filter (page 351).G
Windshield washer fluid reservoir. See Adding Washer Fluid (page 120).H
342
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

Engine coolant reservoir. See Checking the Coolant (page 347).A
Brake fluid reservoir. See Checking the Brake Fluid (page 220).B
Battery. See Changing the 12V Battery (page 353).C
Power distribution box. See Accessing the Under Hood Fuse Box (page 323).D
Air filter assembly. See Changing the Engine Air Filter (page 351).E
Engine oil dipstick. See Engine Oil Dipstick Overview (page 345).F
Engine oil filler cap. See Adding Engine Oil (page 346).G
Windshield washer fluid reservoir. See Adding Washer Fluid (page 120).H
344
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

ENGINE OIL CAPACITY ANDSPECIFICATION
For filling information, please refer to theCapacities and Specifications section of yourowner's manual. See Engine Oil Capacityand Specification (page 410).
CHECKING THE COOLANT
When the engine is cold, check theconcentration and level of the coolant at theintervals listed in the scheduled maintenanceinformation. See Scheduled Maintenance(page 463).
Note:Make sure that the coolant level isbetween the minimum and maximum markson the coolant reservoir.
Note: Coolant expands when it is hot. Thelevel may extend beyond the MAX mark.
If the coolant level is at or below theminimum mark, add prediluted coolantimmediately.
Maintain coolant concentration within 48%to 50%, which equates to a freeze pointbetween -29°F (-34°C) and -35°F (-37°C).Coolant concentration should be checkedusing a refractometer. We do not recommendthe use of hydrometers or coolant test stripsfor measuring coolant concentration.
Adding Coolant
WARNING: Keep your hands andclothing clear of the cooling fan.
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir cap witha thick cloth to prevent the possibility ofscalding and slowly remove the cap.Failure to follow this instruction could resultin personal injury.
WARNING: Do not add enginecoolant when the engine is on or thecooling system is hot. Failure to follow thisinstruction could result in personal injury.
WARNING: Do not add coolantfurther than the MAX mark.
WARNING: Do not put coolant in thewindshield washer reservoir. If sprayed onthe windshield, coolant could make itdifficult to see through the windshield.
WARNING: Do not allow the fluid totouch your skin or eyes. If this happens,rinse the affected areas immediately withplenty of water and contact your physician.
Note: Do not use stop leak pellets, coolingsystem sealants, or non-specified additivesas they can cause damage to the enginecooling or heating systems. Resultingcomponent damage may not be covered bythe vehicle Warranty.
Note:Automotive fluids are notinterchangeable.
347
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

It is very important to use prediluted coolantapproved to the correct specification in orderto avoid plugging the small passageways inthe engine cooling system. See Capacitiesand Specifications (page 404). Do not mixdifferent colors or types of coolant in yourvehicle. Mixing of engine coolants or usingan incorrect coolant may harm the engine orcooling system components and could voidthe vehicle Warranty.
Note:If prediluted coolant is not available,use the approved concentrated coolantdiluting it to 50/50 with deionized or distilledwater. See Capacities and Specifications(page 404). Using water that has not beendeionized may contribute to depositformation, corrosion and plugging of thesmall cooling system passageways.
To top up the coolant level do the following:
1.Unscrew the cap slowly. Any pressureescapes as you unscrew the cap.
2.Add enough prediluted coolant to reachthe correct level.
Note:We do not recommend the use ofrecycled coolant.
3.Replace the coolant reservoir cap. Turnthe cap clockwise until it contacts thehard stop.
4.Check the coolant level in the coolantreservoir the next few times you driveyour vehicle. If necessary, repeat step 2.
If you have to add more than 1.1 qt (1 L) ofengine coolant per month, have your vehiclechecked as soon as possible. Operating anengine with a low level of coolant can resultin engine overheating and possible enginedamage.
In case of emergency, you can add a largeamount of water without engine coolant inorder to reach a vehicle service location.Service your vehicle as soon as possible.
Water alone, without engine coolant, cancause engine damage from corrosion,overheating or freezing.
Do not use the following as a coolantsubstitute, as they can cause engine damagefrom overheating or freezing:
•Alcohol.
•Methanol.
•Brine.
•Any coolant mixed with alcohol ormethanol antifreeze.
Do not add extra inhibitors or additives tothe coolant. These can be harmful andcompromise the corrosion protection of thecoolant.
Severe Climates
If you drive in extremely cold climates, youmay need to increase the coolantconcentration above 50%.
Note:A coolant concentration of 60%provides improved freeze point protection.Coolant concentrations above 60% decreasethe overheat protection characteristics ofthe coolant and could cause enginedamage.
If you drive in extremely hot climates, youmay need to decrease the coolantconcentration to 40%.
348
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

Note:A coolant concentration of 40%provides improved overheat protection.Coolant concentrations below 40% decreasethe overheat and corrosion protectioncharacteristics of the coolant and couldcause engine damage.
Coolant Change
WARNING: Do not dispose of coolantin the household refuse or the publicsewage system. Use an authorized wastedisposal facility.
Change the coolant at specific mileageintervals. Refer to the scheduledmaintenance information. See NormalScheduled Maintenance (page 467).
Note:Dispose of used coolant in theappropriate manner.
Follow your community's regulations andstandards for recycling and disposing ofautomotive fluids.
Fail-Safe Cooling
Fail-safe cooling allows you to temporarilydrive your vehicle before any incrementalcomponent damage occurs. The fail-safedistance depends on ambient temperature,vehicle load and terrain.
How Fail-Safe Cooling Works
If the engine begins to overheat,the coolant temperature gaugemoves toward the red zone:
A warning lamp illuminates and amessage may appear in theinformation display.
If the engine reaches a presetover-temperature condition, the engineautomatically switches to alternating cylinderoperation. Each disabled cylinder acts as anair pump and cools the engine.
When this occurs, your vehicle still operates,however:
•Engine power is limited.
•The air conditioning system turns off.
Continued operation increases the enginetemperature, causing the engine tocompletely shut down. Your steering andbraking effort increases in this situation.
When the engine temperature cools, you canre-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is for useduring emergencies only. Operate yourvehicle in fail-safe mode only as long asnecessary to bring your vehicle to rest ina safe location and seek immediate repairs.When in fail-safe mode, your vehicle willhave limited power, will not be able tomaintain high-speed operation, and maycompletely shut down without warning,potentially losing engine power, powersteering assist, and power brake assist,which may increase the possibility of acrash resulting in serious injury.
349
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir cap witha thick cloth to prevent the possibility ofscalding and slowly remove the cap.Failure to follow this instruction could resultin personal injury.
Your vehicle has limited engine power whenin the fail-safe mode, drive your vehicle withcaution. Your vehicle does not maintainhigh-speed operation and the engine couldoperate poorly.
Remember that the engine is capable ofautomatically shutting down to preventengine damage. In this situation:
1.Pull off the road as soon as safelypossible and switch the engine off.
2.If you are a member of a roadsideassistance program, we recommend thatyou contact your roadside assistanceservice provider.
3.If this is not possible, wait for a shortperiod of time for the engine to cool.
4.Check the coolant level. If the coolantlevel is at or below the minimum mark,add prediluted coolant immediately.
5.When the engine temperature cools, youcan re-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
Note:Driving your vehicle without repairincreases the chance of engine damage.
Engine Coolant TemperatureManagement (If Equipped)
WARNING: To reduce the risk ofcrash and injury, be prepared that thevehicle speed may reduce and the vehiclemay not be able to accelerate with fullpower until the coolant temperaturereduces.
If you tow a trailer with your vehicle, theengine may temporarily reach a highertemperature during severe operatingconditions, for example ascending a long orsteep grade in high ambient temperatures.
At this time, you may notice the coolanttemperature gauge moves toward the redzone and a message may appear in theinformation display.
You may notice a reduction in vehicle speedcaused by reduced engine power in orderto manage the engine coolant temperature. Your vehicle may enter this mode if certainhigh-temperature and high-load conditionstake place. The amount of speed reductiondepends on vehicle loading, grade andambient temperature. If this occurs, there isno need to stop your vehicle. You cancontinue to drive.
The air conditioning may automatically turnon and off during severe operatingconditions to protect the engine fromoverheating. When the coolant temperaturedecreases to the normal operatingtemperature, the air conditioning turns on.
350
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenance

If the coolant temperature gauge moves fullyinto the red zone, or if the coolanttemperature warning or service engine soonmessages appear in your information display,do the following:
1.Stop your vehicle as soon as it is safe todo so. Fully apply the parking brake, shiftinto park (P) or neutral (N).
2.Leave the engine running until thecoolant temperature gauge needlereturns to the normal position. If thetemperature does not drop after severalminutes, follow the remaining steps.
3.Switch the engine off and wait for it tocool. Check the coolant level.
4.If the coolant level is at or below theminimum mark, add prediluted coolantimmediately.
5.If the coolant level is normal, restart theengine and continue.
CHANGING THE ENGINE AIR
FILTER
WARNING: To reduce the risk ofvehicle damage and personal burn injuries,do not start your engine with the aircleaner removed and do not remove itwhile the engine is running.
When changing the air filter element, useonly the air filter element listed. SeeCapacities and Specifications (page 404).
For turbocharged equipped vehicles: Whenservicing the air cleaner, it is important thatno foreign material enter the air inductionsystem. The engine and turbocharger aresusceptible to damage from even smallparticles.
Change the air filter element at the properinterval. See Scheduled Maintenance (page463).
Note: Failure to use the correct air filterelement may result in severe enginedamage. The customer warranty may bevoid for any damage to the engine if thecorrect air filter element is not used.
1.Release the clamps that secure the airfilter housing cover.
2.Carefully lift the air filter housing cover.
3.Remove the air filter element from the airfilter housing.
4.Wipe any dirt or debris from the air filterhousing and cover to make sure no dirtgets in the engine and to make sure youhave a good seal.
351
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingMaintenanceE144365

Hybrid Battery Systems
We recommend the following actions for yourvehicle:
•When storing your vehicle for greaterthan 30 days the state of charge shouldbe approximately 50%. Additionally werecommend disconnecting the 12Vbattery which will reduce system loadson the HV battery.
12 Volt Battery
•Check and recharge as necessary. Keepconnections clean.
Note:It is necessary to reset memoryfeatures if you disconnect the battery cables.
Brakes
Make sure the brakes and parking brakerelease fully.
Note:If you intend on parking your vehiclefor an extended period after cleaning thewheels with a wheel cleaner, drive yourvehicle for a few minutes before doing so toreduce the risk of increased corrosion of thebrake discs, brake pads and linings.
Tires
•Maintain recommended air pressure.
Note:If you intend on parking your vehiclefor an extended period after cleaning thewheels with a wheel cleaner, drive yourvehicle for a few minutes before doing so.This reduces the risk of corrosion of thebrake discs, brake pads and linings.
REMOVING YOUR VEHICLE FROM
STORAGE
When your vehicle is ready to come out ofstorage, do the following:
•We recommend that you change theengine oil before you use your vehicleagain.
•Wash your vehicle to remove any dirt orgrease film build-up on window surfaces.
•Check windshield wipers for anydeterioration.
•Check under the hood for any foreignmaterial that may have collected duringstorage such as mice or squirrel nests.
•Check the exhaust for any foreignmaterial that may have collected duringstorage.
•Check tire pressures and set tire inflationper the Tire Label.
•Check brake pedal operation. Drive yourvehicle 15 ft (4.5 m) back and forth toremove rust build-up.
•Check fluid levels (including coolant, oiland gas) to make sure there are no leaks,and fluids are at recommended levels.
•If you remove the battery, clean thebattery cable ends and check fordamage.
Contact an authorized dealer if you have anyconcerns or issues.
370
2022 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202108, First-PrintingStoring Your Vehicle