Jeep WRANGLER 4Xe 2022 Manual page 67

CAUTION!
Use only high purity water such as deionized, or
distilled water when mixing the water/ coolant
(antifreeze) solution for the engine, battery or
high voltage electronics cooling systems.
The use of lower quality water will reduce the
amount of corrosion protection in the engine
cooling system.
Please note that 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.
NOTE:
Mixing 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.
Low pressure expansion bottles for power elec-

tronics and battery cooling require a special tool
for removing the cap from the expansion bottle.
For the battery coolant bottle, it is important to
not add coolant if level is low. The vehicle should
be taken to an authorized dealer for proper
servicing of the battery coolant loop if this
should occur.
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.
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.
SERVICING AND MAINTENANCE
Disposal Of Used Coolant
Used ethylene glycol-based coolant 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.
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 coolant (antifreeze) in the bottle should
be between the "MAX" and "MIN" lines marked on
the bottle.
As long as the engine operating temperature is
satisfactory, the coolant only needs to be checked
once a month.
When additional coolant is needed to maintain the
proper level, it should be added to the coolant
bottle. Do not overfill.
See an authorized dealer for service.
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