cooling JEEP WRANGLER 4XE 2021 Owners Manual
Page 126 of 476
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$ K R W H Q J L Q H F R R O L Q J V \ V W H P L V G D Q J H U R X V < R X R U
R W K H U V F R X O G E H E D G O \ E X U Q H G E \ V W H D P R U E R L O L Q J
F R R O D Q W , W L V U H F R P P H Q G H G W R F D O O D Q D X W K R U L ] H G
G H D O H U I R U V H U Y L F H L I \ R X U Y H K L F O H R Y H U K H D W V
Úpage 401.
CAUTION!
Driving with a hot engine 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”, turn the engine
off immediately and call an authorized dealer for
service.
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Take care to avoid the radiator cooling fan
whenever the hood is raised. It can start
anytime the ignition switch is ON. You can be
injured by moving fan blades.
Remove any metal jewelry such as rings,
watch bands and bracelets that could make
an inadvertent electrical contact. You could be
seriously injured.
Batteries contain sulfuric acid that can burn
your skin or eyes and generate hydrogen gas
which is flammable and explosive. Keep open
flames or sparks away from the battery.
WARNING!
Do not allow vehicles to touch each other as this
could establish a ground connection and
personal injury could result.
WARNING!
Failure to follow this jump starting procedure
could result in personal injury or property
damage due to battery explosion.
CAUTION!
Failure to follow these procedures could result in
damage to the charging system of the booster
vehicle or the discharged vehicle.
Page 397 of 476
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$ K R W H [ K D X V W V \ V W H P F D Q V W D U W D I L U H L I \ R X S D U N
R Y H U P D W H U L D O V W K D W F D Q E X U Q 6 X F K P D W H U L D O V
P L J K W E H J U D V V R U O H D Y H V F R P L Q J L Q W R F R Q W D F W
Z L W K \ R X U H [ K D X V W V \ V W H P ' R Q R W S D U N R U
R S H U D W H \ R X U Y H K L F O H L Q D U H D V Z K H U H \ R X U
H [ K D X V W V \ V W H P F D Q F R Q W D F W D Q \ W K L Q J W K D W F D Q
E X U Q : $ 5 1 , 1 *
Do not attempt to inspect an accessory drive
belt with vehicle running.
When working near the radiator cooling fan,
disconnect the fan motor lead. The fan is
temperature controlled and can start at any
time regardless of ignition mode. You could be
injured by the moving fan blades.
You can be badly injured working on or around
a motor vehicle. Only do service work for which
you have the knowledge and the proper equip-
ment. If you have any doubt about your ability
to perform a service job, take your vehicle to a
competent mechanic.
8
21_JL_OM_EN_USC_t.book Page 395
Page 403 of 476
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You or others can be badly burned by hot
engine coolant (antifreezeyf R U V W H D P I U R P \ R X U
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.
8
21_JL_OM_EN_USC_t.book Page 401
Page 405 of 476
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Do not open hot engine cooling system. Never
add engine coolant (antifreezeyf Z K H Q W K H
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.
8
21_JL_OM_EN_USC_t.book Page 403
Page 406 of 476
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Do not open hot engine cooling system. Never
add engine coolant (antifreezeyf Z K H Q W K H
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.
Page 438 of 476
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7 K H W U D F W L R Q J U D G H D V V L J Q H G W R W K L V W L U H L V E D V H G
R Q V W U D L J K W D K H D G E U D N L Q J W U D F W L R Q W H V W V D Q G
G R H V Q R W L Q F O X G H D F F H O H U D W L R Q F R U Q H U L Q J
K \ G U R S O D Q L Q J R U S H D N W U D F W L R Q F K D U D F W H U L V W L F V
: $ 5 1 , 1 *
7 K H W H P S H U D W X U H J U D G H I R U W K L V W L U H L V
H V W D E O L V K H G I R U D W L U H W K D W L V S U R S H U O \ L Q I O D W H G D Q G
Q R W R Y H U O R D G H G ( [ F H V V L Y H V S H H G X Q G H U L Q I O D W L R Q
R U H [ F H V V L Y H O R D G L Q J H L W K H U V H S D U D W H O \ R U L Q
F R P E L Q D W L R Q F D Q F D X V H K H D W E X L O G X S D Q G
S R V V L E O H W L U H I D L O X U H
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Take care to avoid the radiator cooling fan
whenever the hood is raised. It can start
anytime the ignition switch is ON. You can be
injured by moving fan blades.
Remove any metal jewelry such as rings,
watch bands and bracelets that could make
an inadvertent electrical contact. You could be
seriously injured.
Vehicles with the Stop/Start system will be
equipped with two batteries. Both the main
and the supplemental batteries must be
disconnected to completely de-energize the
12 Volt electrical system.
Serious injury or death could result if you do
not disconnect both batteries. To learn how to
properly disconnect, see an authorized dealer.
CAUTION!
If the negative battery cables are not isolated
properly it can cause a potential power spike or
surge in the system, resulting in damage to
essential electrical components.
Page 456 of 476
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Mixing of engine coolant (antifreezeyf R W K H U W K D Q V S H F L I L H G 2 U J D Q L F $ G G L W L Y H 7 H F K Q R O R J \ 2 $ 7 \f engine coolant (antifreezeyf P D \ U H V X O W L Q H Q J L Q H G D P D J H D Q G
may decrease corrosion protection. Organic Additive Technology (OATyf H Q J L Q H F R R O D Q W L V G L I I H U H Q W D Q G V K R X O G Q R W E H P L [ H G Z L W K + \ E U L G 2 U J D Q L F $ G G L W L Y H 7 H F h-
nology (HOATyf H Q J L Q H F R R O D Q W D Q W L I U H H ] H \f or any “globally compatible” coolant (antifreezeyf , I D Q R Q 2 $ 7 H Q J L Q H F R R O D Q W D Q W L I U H H ] H \f 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.90032yf E \ D Q
authorized dealer as soon as possible.
Do not use water alone or alcohol-based engine coolant (antifreezeyf S U R G X F W V ' R Q R W X V H D G G L W L R Q D O U X V W L Q K L E L W R U V R U D Q W L U X V W S U R G X F W V D V W K H \ P D \ Q R W E H
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 (antifreezeyf 8 V H R I S U R S \ O H Q H J O \ F R O E D V H G H Q J L Q H F R R O D Q W D Q W i -
freezeyf L V Q R W U H F R P P H Q G H G .