engine coolant JEEP WAGONEER 2023 User Guide

SERVICING AND MAINTENANCE311
Inspect the front and rear axle fluid, change if
using your vehicle for police, taxi, fleet, off-road
or frequent trailer towing. X
X X XX XX
Inspect the brake linings, parking brake
function. X
X X XX XX
Inspect transfer case fluid. XX XXX
Additional Maintenance
Replace engine air cleaner filter. XX XXX
Replace the cabin air filter. To be replaced every 12,000 miles (19,000 km).
Replace spark plugs (3.0L Engine).
1X X Replace spark plugs (5.7L Engine).
1
X Replace spark plugs (6.4L Engine).
1
X
Flush and replace the engine coolant at
10 years or 150,000 miles (240,000 km)
whichever comes first. X
X
Mileage Or Time Passed (Whichever
Comes First)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
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SERVICING AND MAINTENANCE313
ENGINE COMPARTMENT
3.0L ENGINE
1 — Intercooler Coolant Pressure Cap 5 — Battery
2 — Engine Coolant Pressure Cap 6 — Engine Air Cleaner Filter
3 — Engine Oil Fill Cap 7 — Washer Fluid Reservoir Cap
4 — Brake Fluid Reservoir Cap 8 — Power Distribution Center (Fuses)
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314SERVICING AND MAINTENANCE
5.7L ENGINE
1 — Engine Air Cleaner Filter 6 — Engine Coolant Reservoir Cap
2 — Engine Oil Fill Cap 7 — Engine Coolant Pressure Cap
3 — Engine Oil Dipstick 8 — Power Distribution Center (Fuses)
4 — Brake Fluid Reservoir Cap 9 — Washer Fluid Reservoir Cap
5 — Battery

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SERVICING AND MAINTENANCE315
6.4L ENGINE
1 — Engine Coolant Pressure Cap 5 — Battery
2 — Engine Oil Fill Cap 6 — Engine Air Cleaner Filter
3 — Engine Oil Dipstick 7 — Washer Fluid Reservoir Cap
4 — Brake Fluid Reservoir Cap 8 — Power Distribution Center (Fuses)
8

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326SERVICING AND MAINTENANCE
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
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, 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
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.
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 310.
Selection Of Coolant
Refer to Engine Fluids And Lubricants Úpage 376.
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 antirust products, as they may not be compatible
with the radiator engine coolant and may plug the radi -
ator.
 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.
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
position. The fan is temperature controlled and can
start at any time the ignition is in the ON position.

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SERVICING AND MAINTENANCE327
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 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 tempera -
tures 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.
 Use care when filling under hood fluids such as engine
oil, washer fluid, antifreeze, etc. to minimize spillage
onto top of engine. Any excess fluid that is spilled onto
the top of the engine should be removed using
compressed air or an absorbent cloth.
 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 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, 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 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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328SERVICING AND MAINTENANCE
(Continued)
Coolant Level
The coolant 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 ranges
indicated on the bottle.
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.
BRAKE SYSTEM
In order to ensure brake system performance, all brake
system components should be inspected periodically. For
the proper maintenance intervals
Úpage 310.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be checked
whenever the vehicle is serviced, or immediately if the
Brake System Warning Light is on. If necessary, add fluid
to bring level within the designated marks on the side of
the reservoir of the brake master cylinder. Be sure to clean
the top of the master cylinder area before removing cap.
With disc brakes, fluid level can be expected to fall as the
brake pads wear. Brake fluid level should be checked
when pads are replaced. If the brake fluid is abnormally
low, check the system for leaks.
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 377. 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.

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SERVICING AND MAINTENANCE335
F46 –5 Amp TanBatt Snsr #2*
F47 –10 Amp RedBPCM
F48 –10 Amp RedCVPAM
F49 –30 Amp PinkAir Suspension Valves
F50 ––Spare
F51 –20 Amp Yellow Fuel Pmp * / FPCM *
F52 ––Spare
F53 ––Spare
F54 –20 Amp Yellow Headlamp LT
F55 ––Spare
F56 ––Spare
F57 ––Spare
F58 ––Spare
F59 50 Amp Red –Air Suspension
F60 ––Spare
F61 ––Spare
F62 ––Spare
F63 –20 Amp Yellow Camera Washer Frt
F64 ––Spare
F65 –15 Amp BlueACT Grille Shutter / ACT Air Dam / Coolant Valve LCVM * / RATVM
F66 –20 Amp Yellow Horns
F67 –10 Amp RedDTCM / Switchable Engine Mount / BSM #2
Cavity Cartridge Fuse Micro Fuse Description
* If Equipped
8

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TECHNICAL SPECIFICATIONS375
FLUID CAPACITIES
US Metric
Fuel (Approximate)
Short Wheel Base 26.5 gal100 L
Long Wheel Base 30.5 gal115 L
Engine Oil With Filter
3.0L Engine 7.5 qt7.1 L
5.7L Engine 7 qt6.6 L
6.4L Engine 7 qt6.6 L
Cooling System *
3.0L Engine 16.6 qt15.7 L
3.0L Engine Intercooler 2.9 qt2.7 L
5.7L Engine 17 qt16 L
6.4L Engine 18.4 qt17.4 L
* Includes heater and coolant recovery bottle filled to MAX level.
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376TECHNICAL SPECIFICATIONS
ENGINE FLUIDS AND LUBRICANTS
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) meeting the requirements of the
manufacturer Material Standard MS.90032.
Engine Coolant — Intercooler We recommend using Mopar® Antifreeze/Coolant 10 Year/150,000 Mile (240,000 km)
Formula OAT (Organic Additive Technology) meeting the requirements of the
manufacturer Material Standard MS.90032.

Engine Oil — 3.0L SO Engine
We recommend using Mopar® SAE 0W-20 Full Synthetic Engine Oil, which meets the
requirements of the manufacturer Material Standard MS-6395. Equivalent full synthetic
SAE 0W-20 engine oil can be used but must have the API Starburst trademark with a
certification level of API-SP or later
Úpage 319. API-SN+ is also acceptable.
CAUTION!
Usage of earlier API certification levels (such as API-SN or prior) can result in engine
damage and is not covered by the New Vehicle Limited Warranty.
Engine Oil — 3.0L HO Engine 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
with a certification level of API-SP or later
Úpage 319. API-SN+ is also acceptable.
CAUTION!
Usage of earlier API certification levels (such as API-SN or prior) can result in engine
damage and is not covered by the New Vehicle Limited Warranty.
Engine Oil — 5.7L Engine We recommend using Mopar® SAE 0W-20 Full Synthetic Engine Oil which meets the
requirements of the manufacturer Material Standard MS-6395. Equivalent full synthetic
SAE 0W-20 engine oil can be used but must have the API Starburst trademark
Úpage 319.

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