2019 Ram 3500 cooling

524 SERVICING AND MAINTENANCE
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) beforereplacement. 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.
NOTE:
• It is the owner's responsibility to maintain the proper level of 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
an authorized dealer drain, flush, and refill with OAT
coolant (conforming to MS.90032) as soon as possible.

SERVICING AND MAINTENANCE 525
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.
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.
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.
7

526 SERVICING AND MAINTENANCE
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.

TECHNICAL SPECIFICATIONS 571
FLUID CAPACITIES
U.S.Metric
Fuel (Approximate)
2500/3500 Shortbed Models 31 Gallons117 Liters
2500/3500 Longbed Models 32 Gallons121 Liters
Engine Oil With Filter
6.4L Engine (We recommend you use SAE 0W-40 engine oil meeting the
requirements of FCA Material Standard MS-12633 for use in all operating
temperatures.) 7 Quarts
6.6 Liters
Cooling System
6.4L Engine – (We recommend you use Mopar Antifreeze/Coolant 10
Year/150,000 Mile Formula that meets the requirements of FCA Material
Standard MS.90032.) 16.6 Quarts
15.7 Liters
8

TECHNICAL SPECIFICATIONS 573
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

680
Center High Mounted Stop Light......................................... 453
Center Seat Storage Compartment ....................................... 113
Changing A Flat Tire .............................................................. 469
Chart, Tire Sizing .................................................................... 533
Check Engine Light (Malfunction Indicator Light) ........... 193
Checking Your Vehicle For Safety ........................................ 286
Checks, Safety .......................................................................... 286
Child Restraint ........................................................................ 258
Child Restraints Booster Seats ........................................................................ 262
Child Seat Installation ................................................ 275, 277
How To Stow An unused ALR Seat Belt ......................... 273Infant And Child Restraints .............................................. 260Locating The LATCH Anchorages ................................... 269
Lower Anchors And Tethers For Children ..................... 264Older Children And Child Restraints .............................. 261
Seating Positions ................................................................. 263
Clean Air Gasoline .................................................................. 568
Cleaning Wheels................................................................................... 551
Climate Control ......................................................................... 79 Automatic ............................................................................... 83
Manual .................................................................................... 79
Cold Weather Operation........................................................ 296
Compact Disc (CD) Maintenance ......................................... 672
Compact Spare Tire ................................................................ 549 Contract, Service......................................................................675
Cooling Pressure Cap (Radiator Cap) ..................................525
Cooling System ........................................................................522
Adding Coolant (Antifreeze) .............................................524
Coolant Level ...............................................................522, 525Cooling Capacity .................................................................571
Disposal Of Used Coolant..................................................525Drain, Flush, And Refill .....................................................523
Inspection ............................................................................. 525
Points To Remember ........................................................... 526Pressure Cap ........................................................................525Radiator Cap ........................................................................525Selection Of Coolant (Antifreeze) .....................523, 571, 572
Corrosion Protection ...............................................................557
Cruise Control (Speed Control) ....................................354, 357
Cruise Light .....................................................................191, 192
Cupholders...............................................................................122
Customer Assistance ..............................................................673
Cybersecurity ...........................................................................576 D
Daytime Running Lights ..........................................................68
Dealer Service ..........................................................................506
Defroster, Rear Window ..........................................................79
Defroster, Windshield ......................................................79, 287
Delay (Intermittent) Wipers ....................................................77
Diagnostic System, Onboard .................................................192

690
Tire Stowage ............................................................................ 483
Tires................................................................... 289, 541, 548, 555 Aging (Life Of Tires)........................................................... 545
Air Pressure ......................................................................... 541
Chains ................................................................................... 552Compact Spare..................................................................... 549
Dual ............................................................................... 554, 565
General Information ................................................... 541, 548
High Speed........................................................................... 543Inflation Pressure ................................................................ 542
Life Of Tires ......................................................................... 545
Load Capacity .............................................................. 537, 538
Pressure Monitoring System (TPMS) ....................... 186, 220
Quality Grading .................................................................. 555
Radial .................................................................................... 543Replacement......................................................................... 546
Rotation ................................................................................ 553
Safety............................................................................. 531, 541
Sizes....................................................................................... 533
Snow Tires ............................................................................ 548
Spare Tires .................................................................... 548, 550
Spinning................................................................................ 544
Trailer Towing ..................................................................... 420
Tread Wear Indicators ........................................................ 545
Wheel Nut Torque .............................................................. 565
To Open Hood ......................................................................... 101 Tongue Weight/Trailer Weight ............................................418
Tonneau Cover ................................................................147, 558
Tonneau Cover Cleaning .......................................................558
Towing ..............................................................................411, 495 Disabled Vehicle ..................................................................495
Guide .....................................................................................418
Recreational ..........................................................................430
Weight ...................................................................................418
Towing Behind A Motorhome ..............................................430
Traction .....................................................................................436
Traction Control ......................................................................200
Traction Control Switch .........................................................200
Trailer Sway Control (TSC) ................................................... 205
Trailer Towing .........................................................................411 Cooling System Tips ........................................................... 426Hitches ..................................................................................417
Minimum Requirements ....................................................418
Mirrors ....................................................................................62
Tips ........................................................................................426Trailer And Tongue Weight...............................................418Wiring ...................................................................................424
Trailer Towing Guide .............................................................418
Trailer Weight ..........................................................................418
Transfer Case ...........................................................................530 Electronically Shifted ..........................................................309
Fluid ...................................................................................... 574