2022 RAM 1500 radiator

422SERVICING AND MAINTENANCE
Cooling System — Drain, Flush And Refill
NOTE: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.
If the engine coolant (antifreeze) is dirty or
contains visible sediment, have an authorized
dealer clean and flush with OAT coolant
(conforming to MS.90032).
For the proper maintenance intervals Úpage 394.
Selection Of Coolant
For further information Ú page 473.
NOTE:
Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT)
engine coolant, may result in engine damage
and may decrease corrosion protection. OAT
engine coolant is different and should not be
mixed with Hybrid Organic Additive Technology
(HOAT) engine coolant or any “globally compat -
ible” coolant. If a non-OAT engine coolant is
introduced into the cooling system in an emer -
gency, the cooling system will need to be
drained, flushed, and refilled with fresh OAT
coolant (conforming to MS.90032), by an autho -
rized dealer as soon as possible.
Do not use water alone or alcohol-based engine
coolant products. Do not use additional rust
inhibitors or anti-rust products, as they may not
be compatible with the radiator engine coolant
and may plug the radiator.
This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not
recommended.
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.
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.

22_DT_OM_EN_USC_t.book Page 422

SERVICING AND MAINTENANCE423
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
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.
Checking Coolant Level — 3.6L Engine
The level of the coolant in the pressurized coolant
bottle should be between the “MIN” and “MAX”
range on the bottle when the engine is cold.
The radiator normally remains completely full, so
there is no need to remove the cap unless
checking for coolant freeze point or replacing
engine coolant (antifreeze). Advise your service
attendant of this. As long as the engine operating
temperature is satisfactory, the coolant bottle
need only be checked once a month. When
additional engine coolant is needed to maintain
the proper level, it should be added to the coolant
bottle. Do not overfill.
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

22_DT_OM_EN_USC_t.book Page 423

424SERVICING AND MAINTENANCE
Checking Coolant Level — 5.7L Engines
With the engine off and cold, the level of the engine
coolant should be between the ADD and SAFE
range on the dipstick.
To check the coolant level:

1. Open the coolant reservoir.

2. Lift and remove the plastic dipstick from the
reservoir neck.

Coolant Reservoir Dipstick

3. Check the coolant level on the dipstick.
The radiator normally remains completely full, so
there is no need to remove the radiator cap unless
checking for engine coolant (antifreeze) freeze
point or replacing engine coolant. Advise your
service attendant of this. As long as the engine
operating temperature is satisfactory, the coolant
bottle need only be checked once a month. When additional engine coolant is needed to
maintain the proper level, it should be added to the
coolant bottle. Do not overfill.
Cooling System Notes
NOTE:When the vehicle is stopped after a few miles/kilo
-
meters 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.
CHARGE AIR COOLER — INTER-COOLER
(D
IESEL ENGINE)
The charge air cooler is positioned in front of the
radiator and the air conditioner condenser. Air
enters the engine through the air cleaner and
passes through the turbocharger, where it is
pressurized. This pressurized air rapidly reaches
high temperature. The air is then directed through
a hose to the charge air cooler and through
another hose to the intake manifold of the engine.
This cooling process enables more efficient
burning of fuel resulting in fewer emissions.

22_DT_OM_EN_USC_t.book Page 424

SERVICING AND MAINTENANCE425
(Continued)
To guarantee optimum performance of the system,
keep the surfaces of the charge air cooler,
condenser and radiator clean and free of debris.
Periodically check the hoses leading to and from
the charge air cooler for cracks or loose clamps
resulting in loss of pressure and reduced engine
performance.
BRAKE SYSTEM
In order to ensure brake system performance, all
brake system components should be inspected
periodically Ú
page 394.
Fluid Level Check — Brake Master Cylinder
The fluid level of the brake 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
Úpage 476.
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 manufacturer's recommended brake
fluid Ú page 476. 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.
To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that
has been in a tightly closed container. Keep
the master cylinder reservoir cap secured at
all times. Brake fluid in an open container
absorbs moisture from the air resulting in a
lower boiling point. This may cause it to boil
unexpectedly during hard or prolonged
braking, resulting in sudden brake failure. This
could result in a collision.
Overfilling the brake fluid reservoir can result
in spilling brake fluid on hot engine parts,
causing the brake fluid to catch fire. Brake
fluid can also damage painted and vinyl
surfaces, care should be taken to avoid its
contact with these surfaces.
Do not allow petroleum based fluid to contam -
inate the brake fluid. Brake seal components
could be damaged, causing partial or
complete brake failure. This could result in a
collision.
WARNING!
8

22_DT_OM_EN_USC_t.book Page 425

TECHNICAL SPECIFICATIONS475
NOTE:If Climatized or Number 1 ULSD fuel is not available, and you are operating below 20°F (-6°C), in sustained arctic conditions, Mopar® Premium Diesel Fuel
Treatment (or equivalent) is recommended to avoid gelling.
CAUTION!
Mixing of engine coolant (antifreeze) other than specified Organic Additive Technology (OAT) engine coolant (antifreeze), may result in engine damage and
may decrease corrosion protection. Organic Additive Technology (OAT) engine coolant is different and should not be mixed with Hybrid Organic Additive Tech -
nology (HOAT) engine coolant (antifreeze) or any “globally compatible” coolant (antifreeze). If a non-OAT engine coolant (antifreeze) is introduced into the
cooling system in an emergency, the cooling system will need to be drained, flushed, and refilled with fresh OAT coolant (conforming to MS.90032), by an
authorized dealer as soon as possible.
Do not use water alone or alcohol-based engine coolant (antifreeze) products. Do not use additional rust inhibitors or antirust products, as they may not be
compatible with the radiator engine coolant and may plug the radiator.
This vehicle has not been designed for use with propylene glycol-based engine coolant (antifreeze). Use of propylene glycol-based engine coolant (antifreeze)
is not recommended.
9

22_DT_OM_EN_USC_t.book Page 475

482 Bed Divider
...................................................... 97Bed Step.......................................................... 90Bedliner......................................................... 463Belts, Seat..................................................... 368Blind Spot Monitoring.................................... 319Bluetooth Connecting To A Particular MobilePhone Or Audio Device After Pairing
..... 276Body Builders Guide........................................ 11Body Mechanism Lubrication........................ 418Bodywork....................................................... 461B-Pillar Location............................................. 448Brake Assist System...................................... 313Brake Control System.................................... 313Brake Fluid.......................................... 425, 476Brake System...................................... 425, 466Fluid Check............................................... 425Master Cylinder......................................... 425Parking...................................................... 150Warning Light............................................ 128Brake/Transmission Interlock....................... 154Bulb Replacement......................................... 438Bulbs, Light.......................................... 370, 438
C
Camera.......................................................... 199Camera, AUX.................................................. 203Camera, Rear................................................ 199Camera, Surround View................................. 200
Camera, Trailer 360...................................... 203Capacities, Fuel............................................ 472Caps, FillerOil (Engine)............................................... 403Radiator (Coolant Pressure)..................... 423Car Washes................................................... 462Carbon Monoxide Warning............................ 370Care And Maintenance................................. 461Cargo Light..............................................57, 135CD................................................................. 270Cellular Phone.............................................. 302Center High Mounted Stop Light................... 443Center Seat Storage Compartment.................. 70Charge Air Cooler.......................................... 424Chart, Tire Sizing........................................... 445Check Engine Light
(Malfunction Indicator Light)......................... 139Checking Your Vehicle For Safety................. 368Checks, Safety.............................................. 368Child Restraint.............................................. 354Child RestraintsBooster Seats........................................... 357Child Seat Installation..................... 363, 364How To Stow An unused ALR Seat Belt.... 362Infant And Child Restraints....................... 356Locating The LATCH Anchorages.............. 361Lower Anchors And Tethers ForChildren................................................ 359Older Children And Child Restraints......... 357Seating Positions...................................... 358
Clean Air Gasoline......................................... 468CleaningWheels...................................................... 457Climate Control................................................62Automatic....................................................62Manual........................................................65Cold Weather Operation................................ 145Compact Spare Tire...................................... 456Connected Services...................................... 282Connected Services FAQ............................... 297Connected Services Features....................... 286Connected Services, Getting Started............ 284Connected Services, Introduction................. 283Contract, Service........................................... 478Controls........................................................ 262Cooling Pressure Cap (Radiator Cap)............ 423Cooling System.................................... 130, 421Adding Coolant (Antifreeze)...................... 422Coolant Level..........................421, 423, 424Cooling Capacity....................................... 472Disposal Of Used Coolant......................... 423Drain, Flush, And Refill............................. 422Inspection........................................ 423, 424Points To Remember................................ 424Pressure Cap............................................ 423Radiator Cap............................................. 423Selection Of Coolant (Antifreeze)......................... 422, 472, 473Corrosion Protection..................................... 461

22_DT_OM_EN_USC_t.book Page 482

488 Power Steering
.............................................. 173Pregnant Women And Seat Belts...................340Presets.......................................................... 268Pressure Washing.......................................... 408Pretensioners Seat Belts.................................................. 340Profile Settings.............................................. 236
R
Radial Ply Tires.............................................. 452Radiator Cap
(Coolant Pressure Cap)........................ 421, 423RadioOff Road Pages......................................... 306Presets...................................................... 268Settings..................................................... 234Sound Setting............................................ 255Radio Controls............................................... 262Radio Mode................................................... 262Radio Operation.................................. 262, 302Radio Remote Controls.................................. 262Rain Sensitive Wiper System........................... 62RamBox........................................................... 94RamBox Safety................................................ 96Rear Axle (Differential)................................... 427Rear Cargo Area Utility Rails............................ 93Rear Cross Path............................................. 322Rear ParkSense System................................ 186Rear Window, Sliding....................................... 81Reclining Rear Seats....................................... 37
Recreational Towing..................................... 227Four-Wheel Drive Models......................... 228Shifting Into Transfer Case Neutral (N)..... 229Shifting Out Of Transfer CaseNeutral (N)........................................... 230Two-Wheel Drive Models.......................... 228Reformulated Gasoline................................. 468Refrigerant.................................................... 415Registering SiriusXM Guardian..................... 284Release, Hood................................................. 85Release, Tailgate............................................. 86Reminder, Seat Belt...................................... 335Remote Features, Door Lock/Unlock... 290, 298Remote Features, Horn And Lights............... 291Remote Features, Starting................... 290, 299Remote Keyless EntryProgramming Additional Key Fobs............... 22Remote Sound System (Radio) Control......... 262Remote Start (Diesel)...................................... 27Remote Start (Gasoline).................................. 24Remote StartingComfort Systems......................................... 26Exit Remote Start Mode.............................. 25Remote Starting System........................... 24, 27Remove, Tailgate............................................. 88Replacement Bulbs...................................... 438Replacement Tires........................................ 454Reporting Safety Defects.............................. 479Restraints, Child........................................... 354Restraints, Head.............................................. 41
Roadside Assistance............................ 291, 298Rotation, Tires............................................... 460
S
Safety............................................................ 261Safety Checks Inside Vehicle........................ 368Safety Checks Outside Vehicle...................... 369Safety Defects, Reporting............................. 479Safety Features............................................. 261Safety Information, Tire................................. 444Safety Tips.................................................... 368Safety, Exhaust Gas...................................... 370Satellite Radio............................................... 264Saved Radio Stations.................................... 268Schedule, Maintenance..............393, 398, 399Seat Belt Reminder....................................... 130Seat Belts............................................ 335, 368Adjustable Shoulder Belt.......................... 339Adjustable Upper Shoulder Anchorage..... 339Adjustable Upper Shoulder BeltAnchorage............................................ 339Automatic Locking Retractor (ALR)........... 340Child Restraints........................................ 354Energy Management Feature................... 340Extender................................................... 339Front Seat............................... 335, 336, 338Inspection................................................. 368Lap/Shoulder Belt Operation.................... 338Lap/Shoulder Belt Untwisting................... 338Lap/Shoulder Belts................................... 336

22_DT_OM_EN_USC_t.book Page 488