engine coolant RAM CHASSIS CAB 2023 Owner's Guide

SERVICING AND MAINTENANCE369
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 ten years or 150,000 miles
(240,000 km) before replacement. To prevent
reducing this extended maintenance period, it is
important to 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 a local 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.
WARNING!
Do not open a 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.
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370SERVICING AND MAINTENANCE
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
by a child or pet, seek emergency assistance
immediately.
Checking Coolant Level — 6.4L 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.
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 (antifreeze) 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
The charge air cooler is positioned below 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.
The air entering the engine has been cooled by
about 50° to 100°F (10° to 38°C). This cooling
process enables more efficient burning of fuel
resulting in fewer emissions.

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TECHNICAL SPECIFICATIONS419
ENGINE FLUIDS AND LUBRICANTS
6.4L GASOLINE ENGINE
6.7L DIESEL ENGINE
Component Fluid, Lubricant, or Genuine Part
Engine CoolantWe recommend using Mopar® Antifreeze/Coolant 10–Year/150,000 Mile
(240,000 km) Formula OAT (Organic Additive Technology).
Engine Oil We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil which meets the
requirements of the manufacturer Material Standard MS-A0921. Equivalent full synthetic SAE 0W-40
engine oil can be used but must have the API Donut trademark Ú
page 354.
Fuel Selection 87 Octane (R+M)/2 Method, 0-15% Ethanol (Do not use E-85).
Component Fluid, Lubricant, or Genuine Part
Engine CoolantWe recommend using Mopar® Antifreeze/Coolant 10 Year/150,000 Mile
(240,000 km) Formula OAT (Organic Additive Technology).
Engine Oil In ambient temperatures above 0°F (-18°C), we recommend using 10W-30 engine oil such as Mopar®,
Shell Rotella and Shell Rimula that meets the manufacturer Material Standard MS-10902 and the API CK-4
engine oil category is required. Products meeting Cummins® CES 20081 may also be used. The
identification of these engine oils is typically located on the back of the oil container.
In ambient temperatures below 0°F (-18°C), we recommend using 5W-40
synthetic engine oil such as
Mopar®, Shell Rotella and Shell Rimula that meets the manufacturer Material Standard MS-10902 and the
API CK-4 engine oil category is required.
Fuel Filters We recommend using Mopar® Fuel Filter. Must meet 3 micron rating (engine mounted filter). Must meet
5 micron rating (chassis mounted filter).
Using a fuel filter that does not meet the manufacturer’s filtration
and water separating requirements can severely impact fuel system life and reliability.
Crankcase Ventilation Filter We recommend using Mopar® CCV Filter.
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420TECHNICAL SPECIFICATIONS
Fuel Selection
Use good quality diesel fuel from a reputable supplier in your vehicle. Federal law requires that you must fuel
this vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low
Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the emissions control system.

For most year-round service, Number 2 diesel fuel meeting ASTM specification D-975 Grade S15 will
provide good performance.
If climatized or diesel 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.
This vehicle is fully compatible with biodiesel blends up to 5% biodiesel meeting ASTM specification D-975.

Pickup models, and Chassis Cab models configured with optional B20 capability, are additionally
compatible with 20% biodiesel meeting ASTM specification D-7467.
Diesel Exhaust Fluid Mopar® Diesel Exhaust Fluid (API Certified) (DEF) or equivalent that has been API Certified to the ISO
22241 standard. Use of fluids not API Certified to ISO 22241 may result in system damage. You can receive
assistance in locating DEF in the United States by calling 866-RAM-INFO (866-726-4636). In Canada call
1–800–465–2001 (English) or 1–800–387–9983 (French).
Component
Fluid, Lubricant, or Genuine Part
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 (anti -
freeze) is not recommended.

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428
INDEX
A
Adaptive Cruise Control (ACC)
(Cruise Control)
.................................... 148, 150Adding Engine Coolant (Antifreeze)............... 369Adding Fuel.................................................... 177Additives, Fuel............................................... 413AdjustDown........................................................... 33Forward....................................................... 33Rearward..................................................... 33Up................................................................ 33Adjustable Pedals............................................ 38Advance Phone Connectivity......................... 242Air BagAir Bag Operation...................................... 299Air Bag Warning Light................................ 297Enhanced Accident Response......... 302, 341Event Data Recorder (EDR)....................... 341If Deployment Occurs................................ 302Knee Impact Bolsters................................ 299Maintaining Your Air Bag System.............. 303Maintenance............................................. 303Redundant Air Bag Warning Light.............297Transporting Pets...................................... 322
Air Bag Light................................ 103, 297, 322Air Cleaner, Engine
(Engine Air Cleaner Filter).................... 355, 375Air Conditioner Maintenance........................ 357Air Conditioner Refrigerant........................... 357Air Conditioner System................................. 357Air Conditioning................................................ 62Air Conditioning Filter....................................... 65Air Conditioning System................................... 64Air Conditioning, Operating Tips....................... 64Air Filter........................................................ 355Air PressureTires......................................................... 397AlarmPanic........................................................... 16Security Alarm....................................23, 104Alterations/ModificationsVehicle......................................................... 10Antifreeze (Engine Coolant).......................... 368Capacities................................................. 418Disposal................................................... 370Anti-Lock Brake System (ABS)...................... 270Anti-Lock Warning Light................................ 108
Assist, Hill Start............................................. 276Audio Settings............................................... 230Audio Systems (Radio).................................. 199Auto Down Power Windows..............................75Automatic Door Locks......................................27Automatic Folding Mirrors................................44Automatic Headlights.......................................52Automatic Temperature Control (ATC)..............64Automatic Transmission....................... 132, 373Adding Fluid.............................................. 373Fluid And Filter Change............................. 373Fluid Change............................................. 373Fluid Level Check...................................... 372Fluid Type........................................ 373, 421Shifting..................................................... 135Special Additives...................................... 372Automatic Transmission Limp Home Mode... 133AutoPark....................................................... 113AUX Camera......................................... 173, 176Auxiliary Driving Systems.............................. 277Axle Fluid.............................................. 374, 421Axle Lubrication............................................ 374

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429
B
Back Up Camera
............................................ 166Back-Up......................................................... 166Battery................................................. 104, 352Blanket...................................................... 123Charging System Light............................... 104Keyless Key Fob Replacement.................... 16Battery Saver Feature...................................... 55Belts, Seat..................................................... 322Blind Spot Assist Cameras............................. 277Bluetooth Connecting To A Particular Mobile PhoneOr Audio Device After Pairing
................238Body Builders Guide........................................ 10Body Mechanism Lubrication........................ 364B-Pillar Location............................................. 394Brake Assist System...................................... 271Brake Control System.................................... 271Brake Fluid.......................................... 371, 421Brake System...................................... 371, 411Fluid Check............................................... 371Master Cylinder......................................... 371Parking...................................................... 128Warning Light............................................ 103Brake/Transmission Interlock....................... 131Bulb Replacement......................................... 384Bulbs, Light.......................................... 324, 384
C
Cab Top Clearance Lights............................. 388Camera......................................................... 166Camera, AUX........................................ 173, 176Camera, Rear....................................... 166, 168Camera, Trailer Surround View..................... 173Capacities, Antifreeze (Engine Coolant)........ 418Capacities, Fluid........................................... 418Caps, FillerOil (Engine)............................................... 350Power Steering......................................... 148Radiator (Coolant Pressure)..................... 369Car Washes................................................... 408Carbon Monoxide Warning............................ 324Cargo Light....................................................... 54CD................................................................. 232Cellular Phone.............................................. 263Center High Mounted Stop Light................... 388Center Seat Storage Compartment.................. 66Changing A Flat Tire...................................... 329Charge Air Cooler.......................................... 370Chart, Tire Sizing........................................... 390Check Engine Light
(Malfunction Indicator Light)......................... 112Checking Your Vehicle For Safety................. 321Checks, Safety.............................................. 321Child Restraint.............................................. 305
Child RestraintsBooster Seats........................................... 308Child Seat Installation...................... 315, 317How To Stow An unused ALR Seat Belt..... 313Infant And Child Restraints....................... 307Locating The LATCH Anchorages.............. 312Lower Anchors And Tethers For Children.. 310Older Children And Child Restraints.......... 308Seating Positions...................................... 309Clean Air Gasoline......................................... 413CleaningWheels...................................................... 403Climate Control................................................58Automatic....................................................59Manual........................................................62Cold Weather Operation................................ 117Compact Spare Tire...................................... 401Connected Services...................................... 244Connected Services FAQ............................... 258Connected Services Features....................... 247Connected Services, Getting Started............ 246Connected Services, Introduction................. 244Contract, Service........................................... 424Controls........................................................ 224Cooling Pressure Cap (Radiator Cap)............ 369
11

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430 Cooling System
.............................................. 368Adding Coolant (Antifreeze)....................... 369Coolant Level.................................. 368, 370Cooling Capacity........................................ 418Disposal Of Used Coolant.......................... 370Drain, Flush, And Refill.............................. 368Inspection................................................. 370Points To Remember................................. 370Pressure Cap............................................. 369Radiator Cap............................................. 369Selection Of Coolant (Antifreeze)..... 368, 419Corrosion Protection...................................... 407Cruise Control (Speed Control)... 148, 149, 150Cruise Light................................................... 110Customer Assistance..................................... 422Cybersecurity................................................. 199
D
Daytime Running Lights................................... 52Dealer Service............................................... 353Defroster, Rear Window................................... 62Defroster, Windshield............................. 62, 322Delay (Intermittent) Wipers.............................. 57Deleting A Phone........................................... 238Diagnostic System, Onboard......................... 111Diesel Exhaust Brake.................................... 129Diesel Fuel..................................................... 415Diesel Fuel Requirements............................. 415Diesel Fuel System, Re-Priming..................... 363Differential, Limited Slip................................ 147
Dipsticks Power Steering......................................... 148Disabled Vehicle Towing............................... 339Disc Drive..................................................... 232Disconnecting............................................... 238DisposalAntifreeze (Engine Coolant)...................... 370Disturb.......................................................... 241Door Ajar....................................................... 105Door Ajar Light.............................................. 105Door LocksAutomatic.................................................... 27Doors............................................................... 24Draining Fuel/Water Separator Filter............ 360Driver Memory Presets................................. 230Driver’s Seat Back Tilt...................................... 31DrivingThrough Flowing, Rising, Or Shallow Standing Water
................................................... 198Dual Rear Wheels....................... 332, 406, 411
E
Electric Brake Control System....................... 271Anti-Lock Brake System............................ 270Electronic Roll Mitigation................. 272, 277Electrical Power Outlets................................... 71Electronic Range Select (ERS)............. 134, 137Electronic Stability Control (ESC).................. 272Electronic Throttle Control Warning Light...... 104Electronically Shifted Transfer Case.... 140, 143
Emergency Braking.............................. 128, 280Emergency, In Case OfFreeing Vehicle When Stuck..................... 338Hazard Warning Flasher........................... 325Jacking...................................................... 329Jump Starting........................................... 333Emission Control System Maintenance......... 112Engine.................................................. 350, 351Air Cleaner................................................ 355Block Heater............................................. 119Break-In Recommendations............ 127, 128Compartment........................................... 351Compartment Identification...................... 350Coolant (Antifreeze).................................. 419Exhaust Gas Caution................................ 324Fails To Start............................................. 116Flooded, Starting...................................... 116Fuel Requirements................................... 413Identification............................................. 351Idling......................................................... 124Jump Starting........................................... 333Oil.................................................... 353, 419Oil Filler Cap............................................. 350Oil Filter.................................................... 354Oil Reset......................................................92Oil Selection.............................................. 353Oil Synthetic.............................................. 354Overheating.............................................. 335Runaway................................................... 176Starting..................................................... 115

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434 O
Occupant Restraints
...................................... 288Octane Rating, Gasoline (Fuel)...................... 413Oil Filter, Change........................................... 354Oil Filter, Selection......................................... 354Oil life Reset
b
............................................... 92Oil Pressure Light.......................................... 104Oil Reset.......................................................... 92Oil, Engine........................................... 353, 419Capacity.................................................... 418Dipstick..................................................... 352Disposal.................................................... 354Filter................................................ 354, 419Filter Disposal........................................... 354Identification Logo..................................... 354Materials Added To................................... 354Pressure Warning Light............................. 104Recommendation............................ 353, 354Synthetic................................................... 354Onboard Diagnostic System.......................... 111Operating Precautions................................... 111Operator Manual Owner's Manual........................................ 426Outside Rearview Mirrors................................ 42Overdrive....................................................... 138Overdrive OFF Switch..................................... 138Overheating, Engine...................................... 335
P
Paint Care..................................................... 407Pair (link) Uconnect Phone To A
mobile Phone
b
.......................................... 236Panic Alarm...................................................... 16Parking Brake............................................... 128ParkSenseFront And Rear......................................... 159ParkSense System, Rear.............................. 159Passive Entry................................................... 25Pedals, Adjustable........................................... 38Pedestrian Warning System.......................... 280Pets.............................................................. 322Phone Mode................................................. 234Placard, Tire And Loading Information.......... 394PowerDistribution Center (Fuses)....................... 377Door Locks.................................................. 24Mirrors......................................................... 43Outlet (Auxiliary Electrical Outlet)......... 71, 72Outside Mirror Lights................................... 46Seats........................................................... 33Sliding Rear Window.................................... 76Steering.................................................... 148Take-Off Adapter...................................... 147Take-Off Operation................................... 147Windows...................................................... 74
Power SeatsDown...........................................................33Forward.......................................................33Rearward.....................................................33Recline.........................................................33Tilt................................................................33Up................................................................33Power Steering Fluid..................................... 421Pregnant Women And Seat Belts.................. 294Preparation For Jacking................................ 329Presets.......................................................... 230Profile Settings.............................................. 202Programmable Features............................... 199PTO (Power Take-Off).................................... 147
R
Radial Ply Tires.............................................. 398Radiator Cap (Coolant Pressure Cap)... 368, 369RadioPresets..................................................... 230Settings.................................................... 199Radio Controls.............................................. 224Radio Mode................................................... 224Radio Operation................................... 224, 263Radio Remote Controls................................. 224Rain Sensitive Wiper System...........................58

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