2019 Ram 1500 radiator

To minimize the possibility of catalytic converter damage:
•Do not interrupt the ignition when the transmission is in
gear and the vehicle is in motion.
• Do not try to start the vehicle by pushing or towing the
vehicle.
• Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
Cooling System
WARNING!
• You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never open a cooling system pressure cap
when the radiator or coolant bottle is hot.
• Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.
(Continued)
WARNING! (Continued)
•When working near the radiator cooling fan, discon-
nect the fan motor lead or turn the ignition to the
OFF mode. The fan is temperature controlled and can
start at any time the ignition is in the ON mode.
Engine Coolant Checks
Check the engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where appli-
cable). If the engine coolant (antifreeze) is dirty or rusty in
appearance, the system should be drained, flushed and
refilled with fresh coolant. Check the front of the A/C
condenser (if equipped) or radiator for any accumulation
of bugs, leaves, etc. If dirty, clean by gently spraying water
from a garden hose vertically down the face of the A/C
condenser (if equipped) or the back of the radiator core.
Check the engine cooling system hoses for brittle rubber,
cracking, tears, cuts and tightness of the connection at the
coolant recovery bottle and radiator. Inspect the entire
system for leaks.
DO NOT REMOVE THE COOLANT PRESSURE CAP
WHEN THE COOLING SYSTEM IS HOT.
8
SERVICING AND MAINTENANCE 513

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 (antifreeze) (conforming to MS.90032).
Refer to the “Maintenance Plan” in this section for the
proper maintenance intervals.
Selection Of Coolant
Refer to “Fluids And Lubricants” in “Technical Specifica-
tions” for further information. NOTE:
•
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 Tech-
nology (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 authorized dealer as
soon as possible.
• Do not use water alone or alcohol-based engine coolant
(antifreeze) products. Do not use additional rust inhibi-
tors 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 propyl-
ene glycol-based engine coolant (antifreeze). Use of
propylene glycolbased engine coolant (antifreeze) is not
recommended.
514 SERVICING AND MAINTENANCE

•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 pos-
sible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) 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.
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
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.
(Continued)
WARNING! (Continued)
•Do not use a pressure cap other than the one speci-
fied for your vehicle. Personal injury or engine
damage may result.
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 contain-
ers 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 — 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). Ad-
vise your service attendant of this. As long as the engine
operating temperature is satisfactory, the coolant bottle
516 SERVICING AND MAINTENANCE

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.
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.
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 (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.
Opening The Coolant Reservoir
Coolant Reservoir Dipstick
8
SERVICING AND MAINTENANCE 517

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 moisture from rain, snow, or high humidity
accumulating on the radiator and being vaporized when
the thermostat opens, allowing hot engine coolant (anti-
freeze) 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 pro-
tection of your engine which contains aluminum com-
ponents.
• 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 necessary, install ONLY
the correct type thermostat. Other designs may result in
unsatisfactory engine coolant (antifreeze) performance,
poor gas mileage, and increased emissions.
518 SERVICING AND MAINTENANCE

CAUTION!
•Mixing of engine coolant (antifreeze) other than
specified Organic Additive Technology (OAT) en-
gine coolant (antifreeze), may result in engine dam-
age and may decrease corrosion protection. Organic
Additive Technology (OAT) engine coolant is differ-
ent and should not be mixed with Hybrid Organic
Additive Technology (HOAT) engine coolant (anti-
freeze) or any “globally compatible” coolant (anti-
freeze). 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 pos-
sible.
• 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.
9
TECHNICAL SPECIFICATIONS 565

Automatic Headlights........................71
Automatic High Beams .......................70
Automatic Tailgate Release ....................108
Automatic Temperature Control (ATC) ............93
Automatic Transmission ..................306, 521
Adding Fluid .......................... .521
Fluid And Filter Change ...................521
Fluid Change .......................... .521
Fluid Level Check .....................520, 521
Fluid Type ......................... .520, 566
Special Additives ........................ .520
Automatic Transmission Limp Home Mode ........311
Axle Fluid ........................... .521, 566
Axle Lubrication .......................... .521
Back-Up ................................ .396
Back-Up Camera .......................... .396
Battery .............................. .181, 497
Charging System Light ....................181
Keyless Key Fob Replacement ................23
Belts, Seat ............................... .285
Blind Spot Monitoring ...................... .210
Body Builders Guide ..........................5
Body Mechanism Lubrication ..................509
B-Pillar Location .......................... .528Brake Assist System
........................ .200
Brake Control System ....................... .199
Brake Fluid .......................... .519, 566
Brake System ......................... .519, 556
Fluid Check ........................... .519
Master Cylinder ........................ .519
Parking .............................. .300
Warning Light .......................... .180
Brake/Transmission Interlock ..................306
Bulb Replacement ......................... .441
Bulbs, Light .......................... .287, 441
Camera ................................ .396
Camera,

Rear ......................... .396, 398
Camper ................................ .147
Capacities, Fuel ........................... .563
Caps, Filler Oil (Engine) ........................ .494, 500
Radiator (Coolant Pressure) .................516
Carbon Monoxide Warning ................285, 562
Cargo Light ...............................73
Car Washes .............................. .548
Cellular Phone ........................... .646
Center High Mounted Stop Light ...............448
Center Seat Storage Compartment ...............117
12
INDEX 681

Chart, Tire Sizing.......................... .524
Check Engine Light (Malfunction Indicator Light). . . .195
Checking Your Vehicle For Safety ...............284
Checks, Safety ............................ .284
Child Restraint ........................... .263
Child Restraints Booster Seats ........................... .267
Child Seat Installation ..................277, 278
How To Stow An unused ALR Seat Belt ........276
Infant And Child Restraints .................265
Locating The LATCH Anchorages .............273
Lower Anchors And Tethers For Children .......269
Older Children And Child Restraints ...........266
Seating Positions ........................ .268
Clean Air Gasoline ........................ .559
Cleaning Wheels ............................... .542
Climate Control ............................80
Automatic ..............................84
Manual ................................80
Cold Weather Operation ..................... .299
Compact Disc (CD) Maintenance ................671
Compact Spare Tire ........................ .540
Contract, Service .......................... .676
Cooling Pressure Cap (Radiator Cap) ............516Cooling System
........................... .513
Adding Coolant (Antifreeze) .................515
Coolant Level ....................513, 516, 517
Cooling Capacity ........................ .563
Disposal Of Used Coolant ..................516
Drain, Flush, And Refill ....................514
Inspection ......................... .516, 517
Points To Remember ..................... .518
Pressure Cap ........................... .516
Radiator Cap .......................... .516
Selection Of Coolant (Antifreeze) .......514, 563, 564
Corrosion Protection ....................... .547
Cr

uise Control (Speed Control) .................343
Cruise Light .......................... .192, 193
Cupholders .............................. .125
Customer Assistance ....................... .674
Cybersecurity ............................ .570
Daytime Running Lights ......................69
Dealer Service ............................ .498
Defroster, Rear Window .......................80
Defroster, Windshield .....................80, 286
Delay (Intermittent) Wipers ....................77
Diagnostic System, Onboard ...................194
Differential, Limited Slip .....................335
682 INDEX