2019 Ram 4500 Chassis Cab radiator

SERVICING AND MAINTENANCE 435
• 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
glycolbased engine coolant (antifreeze) is not recom -
mended.
• Some vehicles require special tools to add coolant prop -
erly. 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 mainte -
nance 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 (antifreeze) that
meets the requirements of FCA Material Standard MS.90032.
When adding engine coolant (antifreeze):
• We recommend using Mopar Antifreeze/Coolant 10
Year/150,000 Mile (240,000 km) Formula OAT (Organic
Additive Technology) that meets the requirements of FCA
Material Standard MS.90032.
• Mix a minimum solution of 50% OAT engine coolant that meets the requirements of FCA 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 (antifreeze)
solution. The use of lower quality water will reduce the
amount of corrosion protection in the engine cooling
system.
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436 SERVICING AND MAINTENANCE
NOTE:
• It is the owner's responsibility to maintain the proper levelof protection against freezing according to the tempera -
tures occurring in the area where the vehicle is operated.
• Some vehicles require special tools to add coolant prop -
erly. 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 (antifreeze) types is not recom -
mended and can result in cooling system damage. If
HOAT and OAT coolant are mixed in an emergency, have
a 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 (anti -
freeze) 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 accu-
mulation of foreign material on the sealing surfaces. Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a regu-
lated 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. If ingested by a
child or pet, seek emergency assistance immediately. Clean
up any ground spills immediately.WARNING!
• Do not open hot engine cooling system. Never add engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an over -
heated 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.

SERVICING AND MAINTENANCE 437
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
(antifreeze) is needed to maintain the proper level, it should
be added to the coolant bottle. Do not overfill.
Points To Remember
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 mois-
ture 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 (antifreeze) additions are required, the cooling system should be pressure tested for leaks.

• Maintain engine coolant (antifreeze) concentration at a minimum of 50% OAT coolant (conforming to MS.90032)
and distilled water for proper corrosion 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 oper -
ation. If replacement is ever necessary, install ONLY the
correct type thermostat. Other designs may result in unsat -
isfactory engine coolant (antifreeze) performance, poor
gas mileage, and increased emissions.
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TECHNICAL SPECIFICATIONS 485
CAUTION!
• Mixing of engine coolant (antifreeze) other than speci -
fied 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
Technology (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 autho -
rized dealer as soon as possible.
• Do not use water alone or alcohol-based engine coolant (antifreeze) products. Do not use additional rust inhib -
itors or antirust products, as they may not be compat -
ible 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.
8

591
Auto Unlock, Doors ................................................................ 269
Automatic Door Locks ............................................................. 37
Automatic Headlights .............................................................. 68
Automatic Temperature Control (ATC) ................................ 89
Automatic Transmission ................................................ 265, 442 Adding Fluid ....................................................................... 442Fluid And Filter Change .................................................... 442
Fluid Change........................................................................ 442
Fluid Level Check ....................................................... 439, 440
Fluid Type .................................................................... 439, 486
Shifting.................................................................................. 256
Special Additives................................................................. 439
Automatic Transmission Limp Home Mode ...................... 269
Auxiliary Driving Systems .................................................... 174
Axle Fluid................................................................. 442, 443, 486
Axle Lubrication.............................................................. 442, 443 B
Back-Up .................................................................................... 326
Back-Up Camera ..................................................................... 326
Battery............................................................................... 148, 417 Charging System Light....................................................... 148
Keyless Key Fob Replacement ............................................ 19
Battery Saver Feature ............................................................... 71 Belts, Seat ................................................................................. 241
Body Builders Guide ................................................................ 14
Body Mechanism Lubrication ............................................... 428 B-Pillar Location ......................................................................450
Brake Assist System ................................................................163
Brake Control System .............................................................162
Brake Fluid .......................................................................438, 486
Brake System....................................................................438, 476 Fluid Check ..........................................................................438
Master Cylinder ...................................................................438Parking ..................................................................................252
Warning Light......................................................................146
Brake/Transmission Interlock ..............................................256
Bulb Replacement ...................................................................371
Bulbs, Light ......................................................................243, 371 C
Cab Top Clearance Lights ......................................................379
Camera...................................................................................... 326
Camera, Rear....................................................................326, 330
Capacities, Antifreeze (Engine Coolant) ..............................483
Capacities, Fluid ......................................................................483
Caps, Filler Oil (Engine) ..................................................................415, 419
Power Steering .....................................................................284
Radiator (Coolant Pressure)...............................................436
Car Washes ..............................................................................471
Carbon Monoxide Warning ...........................................240, 482
Cargo Light ................................................................................71 Cellular Phone .........................................................................555
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592
Center High Mounted Stop Light......................................... 377
Center Seat Storage Compartment ....................................... 106
Changing A Flat Tire .............................................................. 390
Chart, Tire Sizing .................................................................... 446
Check Engine Light (Malfunction Indicator Light) ........... 159
Checking Your Vehicle For Safety ........................................ 240
Checks, Safety .......................................................................... 240
Child Restraint ........................................................................ 214
Child Restraints Booster Seats ........................................................................ 218
Child Seat Installation ................................................ 229, 231
How To Stow An unused ALR Seat Belt ......................... 227Infant And Child Restraints .............................................. 216Locating The LATCH Anchorages ................................... 224
Lower Anchors And Tethers For Children ..................... 220Older Children And Child Restraints .............................. 217
Seating Positions ................................................................. 219
Clean Air Gasoline .................................................................. 479
Cleaning Wheels................................................................................... 464
Climate Control ......................................................................... 77 Automatic ............................................................................... 81
Manual .................................................................................... 77
Cold Weather Operation........................................................ 250
Compact Disc (CD) Maintenance ......................................... 584
Compact Spare Tire ................................................................ 462 Contract, Service......................................................................587
Cooling Pressure Cap (Radiator Cap) ..................................436
Cooling System ........................................................................433
Adding Coolant (Antifreeze) .............................................435
Coolant Level ...............................................................434, 437Cooling Capacity .................................................................483
Disposal Of Used Coolant..................................................436Drain, Flush, And Refill .....................................................434
Inspection ............................................................................. 437
Points To Remember ........................................................... 437Pressure Cap ........................................................................436Radiator Cap ........................................................................436Selection Of Coolant (Antifreeze) .............................434, 484
Corrosion Protection ...............................................................470
Cruise Control (Speed Control) ....................................285, 288
Cruise Light ............................................................................. 157
Cupholders...............................................................................115
Customer Assistance ..............................................................585
Cybersecurity ...........................................................................488 D
Daytime Running Lights ..........................................................67
Dealer Service ..........................................................................417
Defroster, Rear Window ..........................................................77
Defroster, Windshield ......................................................77, 241
Delay (Intermittent) Wipers ....................................................75
Diagnostic System, Onboard .................................................158

599
Rearward ................................................................................ 42
Recline..................................................................................... 43
Tilt ........................................................................................... 43
Up ............................................................................................ 42
Power Steering Fluid .............................................................. 486
Pregnant Women And Seat Belts.......................................... 199
Preparation For Jacking ......................................................... 390
PTO (Power Take-Off) ........................................................... 281 R
Radial Ply Tires ....................................................................... 456
Radiator Cap (Coolant Pressure Cap).......................... 434, 436
Radio Frequency General Information ........................................... 23, 28, 30, 36
Radio Operation ...................................................................... 555
Rain Sensitive Wiper System................................................... 76
Rear Axle (Differential) .................................................. 442, 443
Rear Camera ............................................................................ 330
Rear ParkSense System .................................................. 309, 317
Rear Window, Sliding .............................................................. 95
Reclining Rear Seats ................................................................. 41
Recreational Towing ............................................................... 358 Shifting Into Transfer Case Neutral (N) .......................... 360
Shifting Out Of Transfer Case Neutral (N) ..................... 362
Reformulated Gasoline .......................................................... 479
Refrigerant ............................................................................... 422
Release, Hood ............................................................................ 95 Reminder, Seat Belt .................................................................189
Remote Keyless Entry...............................................................18 Panic Alarm............................................................................18
Programming Additional Key Fobs ............................. 23, 29
Remote Starting Exit Remote Start Mode........................................................27

Uconnect Customer Programmable Features ...... 500, 522, 541

Uconnect Settings ................................................500, 522, 541
Replacement Bulbs..................................................................371
Replacement Keys .....................................................................29
Replacement Tires ...................................................................459
Reporting Safety Defects ........................................................588
Restraints, Child ......................................................................214
Restraints, Head ........................................................................50 Rotation, Tires..........................................................................466 S
Safety Checks Inside Vehicle .................................................241
Safety Checks Outside Vehicle ..............................................243
Safety Defects, Reporting .......................................................588
Safety Information, Tire .........................................................444
Safety Tips ................................................................................240
Safety, Exhaust Gas.................................................................240
Schedule, Maintenance........................................................... 410
Seat Belt Automatic Locking Retractor (ALR) ................................200
Seat Belt Reminder ..................................................................146
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