cooling DODGE CHALLENGER 2021 User Guide

262SERVICING AND MAINTENANCE
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 shut off the engine or interrupt the igni-
tion when the transmission is in gear and the
vehicle is in motion.
Do not try to start the engine by pushing or
towing the vehicle.
Do not idle the engine with any spark plug wires
disconnected or removed, such as when diag -
nostic testing, or for prolonged periods during
very rough idle or malfunctioning operating
conditions.
NOTE:The vehicle exhaust system may be equipped with
an Electronic Exhaust Valve (EEV) system, if the
exhaust system is replaced with aftermarket
products a Malfunction Indicator Lamp (MIL) will
illuminate.
COOLING SYSTEM
Coolant Checks
Check engine coolant (antifreeze) protection every
12 months (before the onset of freezing weather,
where applicable). If the engine coolant is dirty, the
system should be drained, flushed, and refilled
with fresh Organic Additive Technology (OAT)
coolant (conforming to MS.90032) by an
authorized dealer. Check the front of the 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 condenser.
Check the coolant recovery bottle tubing for brittle
rubber, cracking, tears, cuts, and tightness of the
connection at the 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.
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.
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.

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SERVICING AND MAINTENANCE263
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 247.
Selection Of Coolant
For further information Ú page 306.
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 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. 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 10 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.

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 an 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.
8

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264SERVICING AND MAINTENANCE
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,
seek emergency assistance immediately.
Coolant Level
The coolant bottle provides a quick visual method
for determining that the engine coolant
(antifreeze) level is adequate. With the engine off
and cold, the level of the engine coolant in the
bottle should be between the ranges indicated on
the bottle.
The radiator normally remains completely full, so
there is no need to remove the radiator cap unless
checking for engine coolant freeze point or
replacing engine coolant. 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 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.
WARNING!
Do not open 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 MAINTENANCE265
(Continued)
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.
BRAKE SYSTEM
In order to ensure brake system performance, all
brake system components should be inspected
periodically Ú page 247.
Fluid Level Check — Brake Master Cylinder
Check the fluid level in the master cylinder
immediately if the Brake System Warning Light
indicates system failure.
Check the fluid level in the master cylinder when
performing underhood services.
Clean the top of the master cylinder area before
removing the cap. Add fluid to bring the level up to
the top of the “FULL” mark on the side of the
master cylinder reservoir.
Overfilling of fluid is not recommended because it
may cause leaking in the system.
Add enough fluid to bring the level up to the
requirements described on the brake fluid
reservoir. With disc brakes, fluid level can be
expected to fall as the brake pads wear. However,
low fluid level may be caused by a leak and a
checkup may be needed.
Use only brake fluid that has been recommended
by the manufacturer, and has been kept in a tightly
closed container to avoid contamination from
foreign matter or moisture Ú page 306.
WARNING!
Riding the brakes can lead to brake failure and
possibly a collision. Driving with your foot resting
or riding on the brake pedal can result in
abnormally high brake temperatures, excessive
lining wear, and possible brake damage. You
would not have your full braking capacity in an
emergency.
WARNING!
Use only manufacturer's recommended brake
fluid Úpage 306. Using the wrong type of
brake fluid can severely damage your brake
system and/or impair its performance. The
proper type of brake fluid for your vehicle is
also identified on the original factory installed
hydraulic master cylinder reservoir.
To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that
has been in a tightly closed container. Keep
the master cylinder reservoir cap secured at
all times. Brake fluid in a open container
absorbs moisture from the air resulting in a
lower boiling point. This may cause it to boil
unexpectedly during hard or prolonged
braking, resulting in sudden brake failure. This
could result in a collision.
Overfilling the brake fluid reservoir can result
in spilling brake fluid on hot engine parts,
causing the brake fluid to catch fire. Brake
fluid can also damage painted and vinyl
surfaces, care should be taken to avoid its
contact with these surfaces.8

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270SERVICING AND MAINTENANCE
F20 30 Amp Pink –Wiper Motor
F21 30 Amp Pink
–Headlamp Washers*
20 Amp Blue – Police Police Bat Feed #2
F22 40 Amp Green
–Engine Cooling Pump
(6.2L Supercharged)
20 Amp Blue – Police Police Bat Feed # 3
F23 20 Amp Blue –Police Bat Feed # 1
F24 50 Amp Red
–Radiator Fan (6.2L Supercharged)
20 Amp Blue Police Ignition Run/ACC Feed # 3
F28 ––Spare
F29 –15 Amp BlueAuto Trans (Challenger / Charger
Police)
F30 ––Spare
F31 –25 Amp ClearEngine Module
F32 ––Spare
F33 ––Spare
F34 –25 Amp ClearASD Feed #1
Cavity Cartridge Fuse Mini-FuseDescription
* If Equipped

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TECHNICAL SPECIFICATIONS305
FLUID CAPACITIES
US Metric
Fuel (Approximate)
All Engines 18.5 Gallons70 Liters
Engine Oil With Filter
3.6L Engine 6 Quarts5.6 Liters
5.7L Engine 7 Quarts6.6 Liters
Cooling System*
3.6L Engine 11.1 Quarts10.5 Liters
5.7L Engine 14.7 Quarts13.9 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
9

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306TECHNICAL SPECIFICATIONS
ENGINE FLUIDS AND LUBRICANTS
Component Fluid, Lubricant, or Genuine Part
Engine Coolant We recommend you use Mopar® Antifreeze/Coolant 10 Year/150,000 Mile
(240,000 km) Formula OAT (Organic Additive Technology).
Engine Oil – 3.6L/5.7L Engine We recommend you use API Certified SAE 5W-20 Engine Oil, meeting the
requirements of the manufacturer Material Standard MS-6395 such as
Mopar® SAE 5W-20, Pennzoil SAE 5W-20, and Pennzoil gold 5W-20
semi-synthetic oil. Refer to your engine oil filler cap for correct SAE grade.
Engine Oil Filter We recommend you use 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 – 3.6L Engine 87 Octane (R+M)/2 Method, 0-15% ethanol.
Fuel Selection – 5.7L Engine With Automatic Transmission
89 Octane recommended – 87 Octane acceptable (R+M)/2 Method, 0-15% ethanol.

Fuel Selection – 5.7L Engine With Manual Transmission 91 Octane or higher (R+M)/2 Method, 0-15% ethanol.
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 (antifreeze)
is not recommended.

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313
Autostick Operation
.................................................... 91Axle Fluid....................................................... 307Axle Lubrication............................................. 307
B
Back-Up......................................................... 108Battery.................................................... 70, 254Charging System Light................................. 70Keyless Key Fob Replacement.................... 14Location.................................................... 254Belts, Seat..................................................... 223Blind Spot Monitoring.................................... 184BluetoothConnecting To A Particular Mobile Phone Or Audio Device After Pairing
................154Body Mechanism Lubrication........................ 260B-Pillar Location............................................. 285Brake Assist System...................................... 179Brake Control System.................................... 179Brake Fluid.......................................... 265, 307Brake System...................................... 265, 301Fluid Check..................................... 265, 307Master Cylinder......................................... 265Parking........................................................ 82Warning Light..................................... 70, 301
Brake/Transmission Interlock......................... 87Break-In Recommendations, New Vehicle....... 82Brightness, Interior Lights................................ 45Bulb Replacement........................................ 276Bulbs, Light.......................................... 225, 276
C
Camera, Rear................................................ 108Capacities, Fluid........................................... 305Caps, FillerFuel.......................................................... 109Oil (Engine)............................................... 251Radiator (Coolant Pressure)..................... 264Car Washes................................................... 298Carbon Monoxide Warning............................ 225CargoVehicle Loading........................................ 110CD................................................................. 148Cellular Phone.............................................. 177Certification Label......................................... 110Chains, Tire................................................... 295Chart, Tire Sizing........................................... 281Check Engine Light
(Malfunction Indicator Light)............................ 77Checking Your Vehicle For Safety................. 223Checks, Safety.............................................. 223Child Restraint.............................................. 208
Child RestraintsBooster Seats........................................... 211Child Seat Installation............................... 221How To Stow An unused ALR Seat Belt..... 217Infant And Child Restraints....................... 210Lower Anchors And Tethers For Children.. 213Older Children And Child Restraints.......... 210Seating Positions...................................... 212Clean Air Gasoline......................................... 303CleaningWheels...................................................... 294Climate Control................................................48Cold Weather Operation...................................81Compact Spare Tire...................................... 292Contract, Service........................................... 309Controls........................................................ 140Cooling Pressure Cap (Radiator Cap)............ 264Cooling System............................................. 262Adding Coolant (Antifreeze)...................... 263Coolant Level................................... 262, 264Cooling Capacity....................................... 305Disposal Of Used Coolant......................... 264Drain, Flush, And Refill............................. 262Inspection................................................. 264Points To Remember................................ 264Pressure Cap............................................ 264Radiator Cap............................................. 264Selection Of Coolant (Antifreeze)......................... 263, 305, 306
11

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314 Corrosion Protection
...................................... 298Cruise Control.................................................. 93Cruise Control (Speed Control)........................ 94Cruise Light.............................................. 75, 76Customer Assistance..................................... 308Customer Programmable Features................120Cybersecurity................................................. 119
D
Daytime Running Lights................................... 42Dealer Service............................................... 254Deck Lid Power Release............................................ 59Defroster, Windshield.................................... 223De-Icer, Remote Start...................................... 20Delay (Intermittent) Wipers.............................. 46Deleting A Phone........................................... 155Diagnostic System, Onboard........................... 76Dimmer SwitchHeadlight..................................................... 42DipsticksOil (Engine)................................................ 253Disabled Vehicle Towing................................ 244Disc Drive...................................................... 148Disconnecting................................................ 155DisposalAntifreeze (Engine Coolant)....................... 264Disturb........................................................... 157
Door Ajar.......................................................... 71Door Ajar Light................................................. 71Door LocksAutomatic.................................................... 24Doors............................................................... 21Drag & Drop.................................................. 138Drive Modes.................................................. 173Driver Memory Presets................................. 145Driver’s Seat Back Tilt...................................... 29DrivingThrough Flowing, Rising, Or Shallow Standing Water
................................................... 118
E
Electric Brake Control System....................... 179Anti-Lock Brake System............................ 178Electronic Roll Mitigation................. 179, 183Electric Remote Mirrors................................... 37Electrical Power Outlets................................... 54
Electronic Power Distribution Center (Fuses)... 268
Electronic Speed Control (Cruise Control)........ 94Electronic Stability Control (ESC).................. 180Electronic Throttle Control Warning Light......... 71Emergency, In Case OfFreeing Vehicle When Stuck..................... 243Jacking..................................................... 229Jump Starting......................... 238, 239, 240Towing...................................................... 244
Emission Control System Maintenance............77Engine.................................................. 251, 252Air Cleaner................................................ 256Block Heater................................................81Break-In Recommendations........................82Checking Oil Level.................................... 253Compartment.................................. 251, 252Compartment Identification...................... 251Coolant (Antifreeze).................................. 262Cooling...................................................... 262Exhaust Gas Caution................................ 225Fails To Start................................................81Flooded, Starting.........................................81Fuel Requirements................................... 302Jump Starting......................... 238, 239, 240Oil...........................................255, 305, 306Oil Filler Cap............................................. 251Oil Filter.................................................... 256Oil Selection..................................... 255, 305Oil Synthetic.............................................. 255Overheating.............................................. 241Starting.................................................78, 79
Enhanced Accident Response Feature... 206, 245
Ethanol.......................................................... 303Exhaust Gas Cautions................................... 225Exhaust System................................... 225, 261Exterior Lighting...............................................41Exterior Lights........................................ 41, 225

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315
F
Filler Location Fuel
........................................ 109Filters Air Cleaner................................................. 256Air Conditioning.................................. 52, 258Engine Oil........................................ 256, 306Engine Oil Disposal................................... 256Flashers......................................................... 226Hazard Warning......................................... 226Turn Signals................................ 44, 75, 225Flash-To-Pass.................................................. 43Flooded Engine Starting.................................. 81Fluid Capacities............................................. 305Fluid Leaks.................................................... 225Fluid Level ChecksBrake........................................................ 265Cooling System.......................................... 262Engine Oil.................................................. 253Transfer Case............................................ 267Fluid, Brake................................................... 307Fog Lights........................................................ 44Fold-Flat Seats.......................................... 29, 30Forward Collision Warning............................. 187Freeing A Stuck Vehicle................................. 243
Fuel............................................................... 302Additives................................................... 303Clean Air................................................... 303Ethanol..................................................... 303Filler Cap (Gas Cap).................................. 109Gasoline................................................... 302Materials Added....................................... 303Methanol.................................................. 303Octane Rating.................................. 302, 306Requirements........................................... 302Specifications........................................... 306Tank Capacity........................................... 305Fueling.......................................................... 109Fuses............................................................ 267
G
Garage Door Opener (HomeLink)..................... 38Gas Cap (Fuel Filler Cap).............................. 109Gasoline, Clean Air........................................ 303Gasoline, Reformulated................................ 303Gear Ranges.................................................... 88Glass Cleaning.............................................. 300Gross Axle Weight Rating..................... 111, 112Gross Vehicle Weight Rating................ 110, 111GVWR............................................................ 110
H
HazardDriving Through Flowing, Rising, Or Shallow Standing Water
.................................... 118Hazard Warning Flashers.............................. 226Head Restraints........................................34, 35Head Rests............................................... 34, 35HeadlightsAutomatic....................................................43Cleaning.................................................... 298High Beam/Low Beam Select Switch..........42Lights On Reminder.....................................43On With Wipers............................................43Passing........................................................43Switch..........................................................41Time Delay...................................................43Washers.................................................... 253Heated Mirrors.................................................38Heated Seats...................................................32Heater..............................................................48Heater, Engine Block........................................81
High Beam/Low Beam Select (Dimmer) Switch.. 42
Hill Start Assist.............................................. 182HitchesTrailer Towing........................................... 113HomeLink (Garage Door Opener).....................38Hood Prop........................................................58Hood Release...................................................5811

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