2022 DODGE DURANGO coolant temperature

SERVICING AND MAINTENANCE273
Adding Coolant
Your vehicle has been built with an improved
engine coolant (OAT coolant conforming to
MS.90032) that allows extended maintenance
intervals. This engine coolant (antifreeze) can
be used up to 10 years or 150,000 miles
(240,000 km) before replacement. To prevent
reducing this extended maintenance period, it is
important that you use the same engine coolant
(OAT coolant conforming to MS.90032) throughout
the life of your vehicle.
Please review these recommendations for using
Organic Additive Technology (OAT) engine coolant
that meets the requirements of the manufacturer
Material Standard MS.90032. When adding
engine coolant:
We recommend using Mopar® Antifreeze/
Coolant 10 Year/150,000 Mile (240,000 km)
Formula OAT that meets the requirements of the
manufacturer Material Standard MS.90032.
Mix a minimum solution of 50% OAT engine
coolant that meets the requirements of the
manufacturer Material Standard MS.90032
and distilled water. Use higher concentrations
(not to exceed 70%) if temperatures below
−34°F (−37°C) are anticipated. Please contact
an authorized dealer for assistance.
Use only high purity water such as distilled or
deionized water when mixing the water/engine
coolant solution. The use of lower quality water
will reduce the amount of corrosion protection
in the engine cooling system.
NOTE:
It is the owner's responsibility to maintain the
proper level of protection against freezing
according to the temperatures occurring in the
area where the vehicle is operated.
Some vehicles require special tools to add
coolant properly. Failure to fill these systems
properly could lead to severe internal engine
damage. If any coolant is needed to be added to
the system, please contact an authorized
dealer.
Mixing engine coolant types is not recom -
mended and can result in cooling system
damage. If HOAT and OAT coolant are mixed in
an emergency, have an authorized dealer drain,
flush, and refill with OAT coolant (conforming to
MS.90032) as soon as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
engine coolant (antifreeze), and to ensure that
engine coolant will return to the radiator from the
coolant expansion bottle/recovery tank if so
equipped. The cap should be inspected and cleaned if there
is any accumulation of foreign material on the
sealing surfaces.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is
a regulated substance requiring proper disposal.
Check with your local authorities to determine the
disposal rules for your community. To prevent
ingestion by animals or children, do not store
ethylene glycol-based coolant in open containers
or allow it to remain in puddles on the ground,
clean up any ground spills immediately. If ingested,
seek emergency assistance immediately.
WARNING!
Do not open hot engine cooling system. Never
add engine coolant (antifreeze) when the
engine is overheated. Do not loosen or
remove the cap to cool an overheated engine.
Heat causes pressure to build up in the
cooling system. To prevent scalding or injury,
do not remove the pressure cap while the
system is hot or under pressure.
Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or
engine damage may result.
8

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274SERVICING AND MAINTENANCE
(Continued)
Cooling System Notes
NOTE:When the vehicle is stopped after a few miles/
kilometers of operation, you may observe vapor
coming from the front of the engine compartment.
This is normally a result of moisture from rain,
snow, or high humidity accumulating on the
radiator and being vaporized when the thermostat
opens, allowing hot engine coolant (antifreeze) to
enter the radiator.
If an examination of your engine compartment
shows no evidence of radiator or hose leaks, the
vehicle may be safely driven. The vapor will soon
dissipate.
Do not overfill the coolant expansion bottle.
Check the coolant freeze point in the radiator
and in the coolant expansion bottle. If engine
coolant needs to be added, the contents of the
coolant expansion bottle must also be protected
against freezing.
If frequent engine coolant additions are
required, the cooling system should be pressure
tested for leaks.
Maintain engine coolant concentration at a
minimum of 50% OAT coolant (conforming to
MS.90032) and distilled water for proper corro-
sion protection of your engine which contains
aluminum components.
Make sure that the coolant expansion bottle
overflow hoses are not kinked or obstructed.
Keep the front of the radiator clean. If your
vehicle is equipped with air conditioning, keep
the front of the condenser clean.
Do not change the thermostat for Summer or
Winter operation. If replacement is ever neces -
sary, install ONLY the correct type thermostat.
Other designs may result in unsatisfactory
engine cooling performance, poor gas mileage,
and increased emissions.
BRAKE SYSTEM
In order to ensure brake system performance, all
brake system components should be inspected
periodically. For the proper maintenance intervals
Ú page 256.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be
checked whenever the vehicle is serviced, or
immediately if the Brake System Warning Light is
on. If necessary, add fluid to bring level within the
designated marks on the side of the reservoir of
the brake master cylinder. Be sure to clean the top
of the master cylinder area before removing cap.
With disc brakes, fluid level can be expected to fall
as the brake pads wear. Brake fluid level should be
checked when pads are replaced. If the brake fluid
is abnormally low, check the system for leaks.
For further information Ú page 312.
WARNING!
Riding the brakes can lead to brake failure and
possibly a collision. Driving with your foot resting
or riding on the brake pedal can result in
abnormally high brake temperatures, excessive
lining wear, and possible brake damage. You
would not have your full braking capacity in an
emergency.
WARNING!
Use only the manufacturer’s recommended
brake fluid Úpage 312. Using the wrong type
of brake fluid can severely damage your brake
system and/or impair its performance. The
proper type of brake fluid for your vehicle is
also identified on the original factory installed
hydraulic master cylinder reservoir.

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317
INDEX
A
About Your Brakes......................................... 307Adaptive Cruise Control (ACC)
(Cruise Control).................................... 116, 118Adding Engine Coolant (Antifreeze)............... 273Adding Fuel.................................................... 137Additives, Fuel............................................... 309AdjustDown.................................................... 34, 35Forward................................................ 34, 35Rearward.............................................. 34, 35Up......................................................... 34, 35Air BagAir Bag Operation...................................... 206Air Bag Warning Light...................... 204, 207Driver Knee Air Bag................................... 211Enhanced Accident Response......... 214, 254Event Data Recorder (EDR)....................... 254Front Air Bag............................................. 207If Deployment Occurs................................ 213Knee Impact Bolsters................................ 211Maintaining Your Air Bag System.............. 215Maintenance............................................. 215
Redundant Air Bag Warning Light............. 205Side Air Bags............................................ 211Transporting Pets..................................... 232Air Bag Light.................................. 89, 204, 232Air Cleaner, Engine
(Engine Air Cleaner Filter)............................. 263Air Conditioner Maintenance........................ 264Air Conditioner Refrigerant.................. 264, 265Air Conditioner System................................. 264Air ConditioningRear............................................................. 59Air Conditioning Filter.................... 61, 264, 265Air Conditioning System................................... 60Air Conditioning, Operating Tips....................... 61Air Filter........................................................ 263Air PressureTires......................................................... 293AlarmArm The System................................... 21, 22Disarm The System..................................... 21Rearm The System...................................... 22Security Alarm............................................. 92Alarm SystemSecurity Alarm............................................. 21
All Wheel Drive (AWD)................................... 109Alterations/ModificationsVehicle.........................................................10Antifreeze (Engine Coolant).................. 272, 311Disposal.................................................... 273Anti-Lock Brake System (ABS)....................... 182Anti-Lock Warning Light...................................92Assist, Hill Start............................................. 186Audio Systems (Radio).................................. 156Auto Down Power Windows..............................70Automatic Headlights.......................................49Automatic High Beams.....................................48Automatic Temperature Control (ATC)..............60Automatic Transmission......................... 99, 105Adding Fluid.............................................. 275Fluid And Filter Change............................. 275Fluid Change............................................. 275Fluid Level Check...................................... 275Fluid Type........................................ 276, 312Special Additives...................................... 275Automatic Transmission Limp Home Mode... 108Auxiliary Driving Systems.............................. 188Auxiliary Electrical Outlet (Power Outlet)..........66Auxiliary Power Outlet......................................66Axle Fluid....................................................... 31211

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