2023 DODGE HORNET radiator cap

218IN CASE OF EMERGENCY
IF YOUR ENGINE OVERHEATS
If the vehicle is overheating, it will need to be serviced by
an authorized dealer.
Potential signs of vehicle overheating:
Temperature gauge is at HOT (H)
 Strong smell of coolant
 White smoke coming from engine or exhaust
 Coolant bottle coolant has bubbles present If the temperature gauge is moving towards or close to the
HOT (H) position, you can reduce the potential for
overheating by taking the appropriate action.

On highways — slow down.
 In city traffic — while stopped, place the transmission in
NEUTRAL (N), but do not increase the engine idle speed
while preventing vehicle motion with the brakes.
 If your Air Conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
 You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control
to high. This allows the heater core to act as a supple -
ment to the radiator and aids in removing heat from the
engine cooling system.
GEAR SELECTOR OVERRIDE
If a malfunction occurs, and the gear selector cannot be
moved out of the PARK position, you can use the following
procedure to temporarily move the gear selector:

1. First turn the engine OFF.

2. Apply the parking brake.
3. Grab the boot material of the gear selector and pull up to carefully separate the gear selector bezel and
boot assembly from the center console.

Gear Selector Bezel

4. Press and maintain firm pressure on the brake pedal.
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 try to open a cooling system pressure cap when
the radiator or coolant bottle is hot.
CAUTION!
Driving with a hot cooling system could damage your
vehicle. If the temperature gauge reads “H,” pull over
and stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops back into
the normal range. If the pointer remains on the “H” and
you hear continuous chimes, turn the engine off
immediately and call for service.

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SERVICING AND MAINTENANCE233
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 specifications, should
be obtained immediately.
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 during diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
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 or rusty in
appearance, the system should be drained, flushed and
refilled with fresh engine coolant. Check the front of
the A/C condenser 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.
Cooling System — Drain, Flush And Refill
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 (conforming to MS.90032).
Refer to the Maintenance Plan for the proper
maintenance intervals
Úpage 224.
Selection Of Coolant
For further information Úpage 269.
NOTE:
Mixing of engine coolant (antifreeze) other than speci-
fied Organic Additive Technology (OAT) engine coolant,
may result in engine damage and may decrease corro -
sion protection. OAT engine coolant is different and
should not be mixed with Hybrid Organic Additive Tech -
nology (HOAT) engine coolant or any “globally compat -
ible” coolant. If a non-OAT engine coolant 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
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.

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.
 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.
8

23_GG_OM_EN_USC_t.book Page 233

234SERVICING AND MAINTENANCE
This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not recom -
mended.
 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 to use the same engine
coolant (OAT coolant conforming to MS.90032) throughout
the life of your vehicle.

Please review these recommendations for using 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 recommended 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. If ingested by a child or pet, seek emergency
assistance immediately. Clean up any ground spills
immediately.
WARNING!

Do not open a 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.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.

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SERVICING AND MAINTENANCE235
Coolant Level
The coolant expansion bottle provides a quick visual
method for determining that the coolant level is adequate.
With the engine off and cold, the level of the engine
coolant (antifreeze) in the bottle should be between the
“MIN” and “MAX” marks.
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.
Engine Coolant Level — 2.0L
With the engine OFF and cold, the level of the engine
coolant should be within the OK range between the
ADD and FULL range on the dipstick.

1. Remove the cap with level dipstick from the engine
coolant bottle.

2. Clean off the coolant from the dipstick.
3. Rest the cap on the opening of the coolant bottle without tightening the cap.
4. Remove the cap with dipstick and check the coolant level on the dipstick.
The radiator normally remains completely full, so there is
no need to remove the radiator/coolant pressure cap
unless checking for engine coolant freeze point or
replacing 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, only OAT coolant that meets the
requirements of the manufacturer Material Standard
MS.90032 should be added to the coolant bottle.
Do not overfill.
Cooling System Notes
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 (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 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
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory engine cooling performance,
poor gas mileage, and increased emissions.
WARNING!
Do not open a 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.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.
8

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278
Brake System ...................................................... 236, 265
Anti-Lock (ABS)........................................................ 265 Fluid Check..................................................... 236
, 269
Master Cylinder ....................................................... 236
Parking ....................................................................... 82
Warning Light ............................................................. 71
Brake/Transmission Interlock........................................86
Brightness, Interior Lights ....................................... 42
, 43
Bulb Replacement ....................................................... 246
Bulbs, Light................................................................... 201
CCamera, Rear ............................................................... 116
Capacities, Fuel............................................................ 268
Caps, Filler Fuel .......................................................................... 119
Oil (Engine) .............................................................. 226
Radiator (Coolant Pressure)................................... 234
Car Washes .................................................................. 263
Carbon Monoxide Warning .......................................... 202
Cargo Tie-Downs ............................................................. 64
Cellular Phone .............................................................. 153
Certification Label ........................................................ 120
Chains, Tire................................................................... 259
Change Oil Indicator ....................................................... 68
Changing A Flat Tire ..................................................... 206
Chart, Tire Sizing .......................................................... 247
Check Engine Light (Malfunction Indicator Light) .........79
Checking Your Vehicle For Safety ............................... 199
Checks, Safety.............................................................. 199
Child Restraint.............................................................. 188 Child Restraints
Booster Seats .......................................................... 191
Child Seat Installation ............................................. 198How To Stow An unused ALR Seat Belt .................195Infant And Child Restraints ..................................... 190
Lower Anchors And Tethers For Children............... 192
Older Children And Child Restraints....................... 190
Seating Positions ..................................................... 191
Child Safety Locks .......................................................... 25
Clean Air Gasoline ........................................................ 266
Cleaning Wheels .....................................................................262
Windshield Wiper Blades ........................................ 230
Climate Control ............................................................... 46 Automatic ................................................................... 46
Cold Weather Operation ................................................. 81
Compact Spare Tire ...................................................... 258
Connector Universal Consumer Interface (UCI) ......................... 51
Console............................................................................ 51 Floor ........................................................................... 51
Contract, Service .......................................................... 272
Cooling Pressure Cap (Radiator Cap) ..........................234
Cooling System ............................................................. 233 Adding Coolant (Antifreeze) ....................................234
Coolant Level ................................................. 233
, 235
Cooling Capacity ...................................................... 268
Disposal Of Used Coolant ....................................... 234 Drain, Flush, And Refill............................................233
Inspection ................................................................ 235 Points To Remember .............................................. 235
Pressure Cap ........................................................... 234
Radiator Cap............................................................ 234
Selection Of Coolant (Antifreeze) ........ 233
, 268, 269
Cornering Lights ............................................................. 41
Corrosion Protection .................................................... 262
Cruise Light ..................................................................... 77 Customer Assistance ................................................... 270
Cybersecurity ................................................................ 129
DDaytime Running Lights ................................................. 40Defroster, Windshield .................................................. 200
Dipsticks Oil (Engine) .............................................................. 227
Disabled Vehicle Towing .............................................. 220
Disposal Antifreeze (Engine Coolant) .................................... 234
Door Ajar .................................................................. 72
, 73
Door Ajar Light ......................................................... 72, 73
Door Locks ...................................................................... 22 Dead Lock Device ..................................................... 25
Passive Entry ............................................................. 23
Driving Through Flowing, Rising, Or Shallow Standing Water ............................... 128

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282
Pets ............................................................................... 199
Placard, Tire And Loading Information ....................... 251
PowerDoor Locks .................................................................22
Liftgate ....................................................................... 60
Outlet (Auxiliary Electrical Outlet) ............................. 52
Outside Mirrors ..........................................................35
Seats...........................................................................29
Sunroof ....................................................................... 56
Windows .....................................................................55
Pregnant Women And Seat Belts................................ 174
Premium Instrument Cluster

b
...................................66
Preparation For Jacking ............................................... 206
Pretensioners Seat Belts ................................................................ 174
Profile Settings ............................................................. 132
Programmable Features .............................................. 130
RRadial Ply Tires ............................................................. 255
Radiator Cap (Coolant Pressure Cap) ......................... 234
Radio Settings ................................................................... 130
Sound Setting ......................................................... 145
Radio Operation ........................................................... 153
Radio Remote Controls................................................ 150
Rain Sensitive Wiper System .........................................45
Rear Camera ................................................................ 116
Rear Cross Path ........................................................... 161
Rear Seats, Folding .........................................................28 Rear Wiper/Washer ........................................................46
Recreational Towing .................................................... 126
Reformulated Gasoline................................................ 266
Refrigerant.................................................................... 230 Release, Hood................................................................. 58
Reminder, Lights On ....................................................... 41
Reminder, Seat Belt ..................................................... 169
Remote Control
Starting System ......................................................... 18
Remote Keyless Entry .................................................... 13 Arm The Alarm ........................................................... 20
Disarm The Alarm ...................................................... 21
Programming Additional Key Fobs ........................... 15
Remote Sound System (Radio) Control....................... 150
Remote Starting Exit Remote Start Mode ............................................ 19
Uconnect Customer Programmable Features ......... 19
Uconnect Settings ..................................................... 19
Remote Starting System ................................................ 18
Removable Rear Shelf.................................................... 63 Replacement Tires........................................................ 256
Reporting Safety Defects ............................................. 273
Restraints, Child ...........................................................188
Restraints, Head ............................................................. 31
Roll Over Warning ............................................................. 8
Rotation, Tires ............................................................... 260
SSafety Checks Inside Vehicle ....................................... 200
Safety Checks Outside Vehicle ....................................201
Safety Defects, Reporting ............................................273
Safety Information, Tire ................................................ 246
Safety Tips.....................................................................199
Safety, Exhaust Gas...................................................... 202
Schedule, Maintenance ............................................... 223
Seat Belt Reminder ........................................................ 73 Seat Belts............................................................. 169
, 200
Adjustable Shoulder Belt ........................................ 172 Adjustable Upper Shoulder Anchorage.................. 172
Adjustable Upper Shoulder Belt Anchorage .......... 172
Child Restraints ....................................................... 188Energy Management Feature................................. 174Extender................................................................... 174
Front Seat ............................................. 169
, 170, 171
Inspection ................................................................ 200
Lap/Shoulder Belt Operation ................................. 171 Lap/Shoulder Belt Untwisting ................................ 172
Lap/Shoulder Belts ................................................. 170Operating Instructions ............................................ 171
Pregnant Women .................................................... 174
Pretensioners .......................................................... 174
Rear Seat ................................................................. 170
Reminder ................................................................. 169
Seat Belt Extender .................................................. 174
Seat Belt Pretensioner............................................ 174
Untwisting Procedure.............................................. 172
Seat Belts Maintenance .............................................. 264
Seats ........................................................................ 28
, 29
Head Restraints ........................................................ 31
Heated ....................................................................... 30
Memory ...................................................................... 27
Power ......................................................................... 29
Rear Folding .............................................................. 28
Seatback Release ..................................................... 28
Tilting .................................................................. 28
, 29
Ventilated .................................................................. 31
Security Alarm ......................................................... 20
, 73
Arm The System ........................................................ 20
Disarm The System ................................................... 21

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