coolant RAM CHASSIS CAB 2022 Owner's Guide

SERVICING AND MAINTENANCE339
6.7L DIESEL ENGINE
1 — Battery 7 — Brake Fluid Reservoir Cap
2 — Engine Coolant Pressure Cap 8 — Battery
3 — Engine Coolant Pressure Reservoir 9 — Power Distribution Center (Fuses)
4 — Engine Oil Fill 10 — Engine Air Cleaner Filter
5 — Engine Oil Dipstick 11 — Power Steering Reservoir Cap
6 — Automatic Transmission Dipstick 12 — Washer Fluid Reservoir Cap
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354SERVICING AND MAINTENANCE
(Continued)
(Continued) Under normal operating conditions, the catalytic
converter will not require maintenance. However, it
is important to keep the engine properly tuned to
ensure proper catalyst operation and prevent
possible catalyst damage.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being
assessed against you.
In unusual situations involving grossly
malfunctioning engine operation, a scorching odor
may suggest severe and abnormal catalyst
overheating. If this occurs, stop the vehicle, turn off
the engine and allow it to cool. Service, including a
tune-up to manufacturer's specifications, should
be obtained immediately. To minimize the possibility of catalytic converter
damage:
Do not interrupt the ignition when the transmis
-
sion 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 compo -
nents disconnected or removed, such as when
diagnostic testing, or for prolonged periods
during very rough idle or malfunctioning oper -
ating conditions.
COOLING SYSTEM
WARNING!
Exhaust gases can injure or kill. They contain
carbon monoxide (CO), which is colorless and
odorless. Breathing it can make you uncon -
scious and can eventually poison you
Ú page 309.
A hot exhaust system can start a fire if you
park over materials that can burn. Such mate -
rials might be grass or leaves coming into
contact with your exhaust system. Do not park
or operate your vehicle in areas where your
exhaust system can contact anything that can
burn.
CAUTION!
The catalytic converter requires the use of
unleaded fuel only. Leaded gasoline will
destroy the effectiveness of the catalyst as an
emissions control device and may seriously
reduce engine performance and cause
serious damage to the engine.
Damage to the catalytic converter can result if
your vehicle is not kept in proper operating
condition. In the event of engine malfunction,
particularly involving engine misfire or other
apparent loss of performance, have your
vehicle serviced promptly. Continued opera -
tion of your vehicle with a severe malfunction
could cause the converter to overheat,
resulting in possible damage to the converter
and vehicle.
CAUTION!
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 radi -
ator 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.

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SERVICING AND MAINTENANCE355
Engine Coolant Checks
Check the engine coolant (antifreeze) protection
every 12 months (before the onset of freezing
weather, where applicable). If the engine coolant 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 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 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.
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 Organic Additive
Technology (OAT) coolant (conforming to
MS.90032).
For the proper maintenance intervals Úpage 329.
Selection Of Coolant
For further information Ú page 404.
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 ten 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.

When working near the radiator cooling fan,
disconnect the fan motor lead or turn the igni -
tion to the OFF mode. The fan is temperature
controlled and can start at any time the igni -
tion is in the ON mode.
WARNING!
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356SERVICING AND MAINTENANCE
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.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.
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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SERVICING AND MAINTENANCE357
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.
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.
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404TECHNICAL SPECIFICATIONS
ENGINE FLUIDS AND LUBRICANTS
6.4L GASOLINE ENGINE
Component Fluid, Lubricant, or Genuine Part
Engine Coolant We 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 342.
Engine Oil Filter We recommend using a Mopar® Engine Oil Filter. If a Mopar® Engine Oil Filter
is unavailable only use filters that meet or exceed SAE/USCAR-36 Filter
Performance Requirements.
Fuel Selection 87 Octane (R+M)/2 Method, 0-15% Ethanol (Do not use E-85).

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TECHNICAL SPECIFICATIONS405
6.7L DIESEL ENGINE
Component Fluid, Lubricant, or Genuine Part
Engine Coolant We 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.
Engine Oil Filter We recommend using a Mopar® Engine Oil Filter. If a Mopar® Engine Oil Filter
is unavailable only use filters that meet or exceed SAE/USCAR-36 Filter
Performance Requirements.
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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406TECHNICAL SPECIFICATIONS
(Continued)
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.

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TECHNICAL SPECIFICATIONS407
CHASSIS FLUIDS AND LUBRICANTS
6.4L GASOLINE ENGINE
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.
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission – 8-Speed Use only Mopar® ZF 8 & 9 Speed ATF Automatic Transmission Fluid, or
equivalent. Failure to use the correct fluid may affect the function or
performance of your transmission.
Automatic Transmission – 6-Speed Use only Mopar® ASRC Automatic Transmission Fluid or equivalent. Failure to
use the proper fluid may affect the function or performance of your
transmission.
Transfer Case We recommend using Mopar® Transfer Case Lubricant for Borg Warner 44-44
and 44-45.
Front and Rear Axle Fluid We recommend using SAE 75W-85 HD Ram GL-5 Synthetic Axle Lubricant.
Limited slip additive is required for limited slip axles. If the axle fluid is not
pre-mixed with limited slip additive we recommend using Mopar®
MS-10111 Limited Slip Additive.
Brake Master Cylinder We recommend using Mopar® DOT 3 and SAE J1703.
Power Steering Reservoir
We recommend using Mopar® Power Steering Fluid +4, Mopar® ATF+4 Automatic
Transmission Fluid.

CAUTION!
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413
INDEX
A
Adaptive Cruise Control (ACC) (Cruise
Control)
................................................ 141, 143Adding Engine Coolant (Antifreeze)............... 355Adding Fuel.................................................... 169Additives, Fuel............................................... 399AdjustDown........................................................... 32Forward....................................................... 32Rearward..................................................... 32Up................................................................ 32Adjustable Pedals............................................ 37Advance Phone Connectivity......................... 231Air BagAir Bag Operation...................................... 286Air Bag Warning Light................................ 284Enhanced Accident Response......... 290, 327Event Data Recorder (EDR)....................... 327If Deployment Occurs................................ 289Knee Impact Bolsters................................ 286Maintaining Your Air Bag System.............. 291Maintenance............................................. 291Redundant Air Bag Warning Light.............285Transporting Pets...................................... 307Air Bag Light..................................95, 284, 307
Air Cleaner, Engine (Engine Air Cleaner
Filter)................................................... 342, 361Air Conditioner Maintenance........................ 344Air Conditioner Refrigerant........................... 344Air Conditioner System................................. 344Air Conditioning................................................ 58Air Conditioning Filter....................................... 61Air Conditioning System................................... 60Air Conditioning, Operating Tips....................... 60Air Filter........................................................ 342Air PressureTires......................................................... 383AlarmSecurity Alarm...................................... 23, 96Alterations/ModificationsVehicle......................................................... 10Antifreeze (Engine Coolant).......................... 355Capacities................................................. 403Disposal................................................... 356Anti-Lock Brake System (ABS)...................... 259Anti-Lock Warning Light................................ 100Assist, Hill Start............................................. 264Audio Settings............................................... 219Audio Systems (Radio).................................. 190Auto Down Power Windows............................. 71Automatic Door Locks...................................... 26
Automatic Headlights.......................................48Automatic Temperature Control (ATC)..............60Automatic Transmission....................... 122, 360Adding Fluid.............................................. 360Fluid And Filter Change............................. 360Fluid Change............................................. 360Fluid Level Check............................. 358, 359Fluid Type........................................ 360, 407Shifting..................................................... 126Special Additives...................................... 358Automatic Transmission Limp Home Mode... 125AutoPark....................................................... 105AUX Camera......................................... 165, 168Auxiliary Driving Systems.............................. 266Axle Fluid.....................................360, 361, 407Axle Lubrication................................... 360, 361
B
Back-Up......................................................... 159Back-Up Camera........................................... 159Battery................................................... 96, 340Blanket..................................................... 114Charging System Light.................................96Keyless Key Fob Replacement....................16Battery Saver Feature......................................51Belts, Seat.................................................... 307
11

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