2023 GENESIS G90 Owners Manual

9-19
09
Information
The coolant level is influenced by the
engine temperature. Before checking or
refilling the coolant, turn the engine off.
WARNING
The electric motor for the
cooling fan may continue to
operate or start up when the
engine is not running and can
cause serious injury. Keep
hands, clothing and tools away
from the rotating fan blades of
the cooling fan.
Always turn off the vehicle unless the
vehicle has to be inspected with the
engine on. Be cautious as the cooling
fan may operate if the negative (-)
battery terminal is not disconnected.
WARNING
Make sure the coolant cap is properly
closed after refilling coolant. Otherwise
the engine could be overheated while
driving.
„Engine compartment front view
ORG3EV091045
1. Check if the coolant cap label is
straight in front.
ORG3EV091043
2. Make sure that the tiny protrusions
inside the coolant cap are securely
interlocked.

9-20
Maintenance
Recommended coolant

[When adding coolant, use only
deionized water, distilled water or soft
water for your vehicle and never mix
hard water in the coolant filled at the
factory.

[An incorrect coolant mixture can
result in severe malfunction or engine
damage.

[The engine in your vehicle has
aluminum engine parts and must be
protected by an phosphate-based
ethylene glycol coolant to prevent
corrosion and freezing.

[Do not use alcohol or methanol
coolant or mix them with the specified
coolant.

[Do not use a solution that contains
more than 60% antifreeze or less than
35% antifreeze, which would reduce
the effectiveness of the solution.
For mixing percentage, refer to the
following table:
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
5°F (-15°C) 35 65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40
Information
If in doubt about the mix ratio, a 50%
water and 50% antifreeze mix is the
easiest to mix together as it will be the
same quantity of each. It is suitable to
use for most temperature ranges of -31°F
(-35°C) and higher.
Changing Coolant
Have coolant be changed by an
authorized retailer of Genesis Branded
products according to the Maintenance
Schedule at the beginning of this
chapter.
WARNING
Do not use engine coolant or antifreeze
in the washer fluid reservoir.
Engine coolant can severely obscure
visibility when sprayed on the
windshield and may cause loss of
vehicle control resulting in an accident.
Engine coolant may also cause damage
to paint and body trim.
NOTICE
To prevent damage to engine parts,
put a thick towel around the engine
coolant cap or liquid-cooled intercooler
coolant cap before refilling the
coolant to prevent the coolant from
overflowing into engine parts, such as
the alternator.

9-21
09
Checking the Brake Fluid Level
ORS091006
Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX and MIN marks on the side
of the reservoir.
Before removing the reservoir cap and
adding brake fluid, clean the area around
the reservoir cap thoroughly to prevent
brake fluid contamination.
If the level is low, add the specified brake
fluid to the MAX level. The level will fall
with accumulated mileage. This is a
normal condition associated with the
wear of the brake linings. If the fluid level
is excessively low, have the brake system
checked by an authorized retailer of
Genesis Branded products.
WARNING
If the brake system requires frequent
additions of fluid this could indicate
a leak in the brake system. Have the
vehicle inspected by an authorized
retailer of Genesis Branded products.
WARNING
Do not let brake fluid enter into your
eyes. If brake fluid gets in your eyes,
flush your eyes with clean water for
at least 15 minutes and get immediate
medical attention.
NOTICE

[Do not allow brake fluid to contact
the vehicle’s body paint, as it will
result in paint damage.

[NEVER use brake fluid which has
been exposed to open air for an
extended time, as its quality cannot
be guaranteed. It should be disposed
of properly.

[Do not use the wrong type of brake
fluid. A few drops of mineral based
oil such as engine oil in your brake
system can damage brake system
parts.
Information
Use only the specified brake fluid (refer
to “Recommended Lubricants and
Capacities” section in chapter 2).
BRAKE FLUID

9-22
Maintenance
WASHER FLUID
Checking the Washer Fluid Level
ORS091007
Check the fluid level in the washer fluid
reservoir and add fluid if necessary. Plain
water may be used if washer fluid is not
available. However, use washer solvent
with antifreeze characteristics in cold
climates to prevent freezing.
WARNING
To prevent serious injury or death, take
the following safety precautions when
using washer fluid:

[Do not use engine coolant or
antifreeze in the washer fluid
reservoir. Engine coolant can
severely obscure visibility when
sprayed on the windshield and
may cause loss of vehicle control
resulting in an accident or damage to
paint and body trim.

[Do not allow sparks or flame to
contact the washer fluid or the
washer fluid reservoir. Washer fluid
may contain alcohol and can be
flammable.

[Do not drink washer fluid and avoid
contact with skin. Washer fluid is
harmful to humans and animals.

[Keep washer fluid away from
children and animals.

9-23
09
Filter Replacement
ORS092008N
Do not attempt to wash or to rinse it, as
water will damage the filter.
If soiled, the air cleaner filter must be
replaced.
Visit an authorized retailer of Genesis
Branded products to replace air cleaner
filter.
Replace the filter according to the
Maintenance Schedule.
Information
If the vehicle is operated in extremely
dusty or sandy areas, replace the air
cleaner filter more often than the
usual recommended intervals (Refer
to “Maintenance Under Severe Usage
Conditions” section in this chapter).
NOTICE

[Do not drive with the air cleaner filter
removed. This will result in excessive
engine wear.

[When removing the air cleaner filter,
be careful that dust or dirt does not
enter the air intake, or damage may
result.

[We recommend that you use parts
for replacement from an authorized
retailer of Genesis Branded products.
AIR CLEANER

9-24
Maintenance
Filter Inspection
The cabin air filter should be replaced
according to the Maintenance Schedule.
If the vehicle is operated in severely air-
polluted cities or on dusty rough roads
for a long period, it should be inspected
more frequently and replaced sooner.
Replace the cabin air filter by following
the procedure below and be careful to
avoid damaging other components.
Filter Replacement
ORS091009
1. Open the glove box and remove the
support rod M.
ORS091010
2. Remove the stoppers on both sides to
allow the glove box to hang freely on
the hinges.
ORS092011N
3. Press and hold the lock M on the left
side of the cover.
4. Pull out N the cover
5. Replace the cabin air filter.
6. Reassemble in the reverse order of
disassembly.
CABIN AIR FILTER

9-25
09
Engine Compartment
ORS091012
ORS092054N
1. Open the engine hood and remove
the cover of the air conditioning
assembly to locate the air filter.
2. Open the engine hood and remove
the cover of air conditioning unit.
3. Press and hold the lock M on the left
side of the cover.
4. Pull out N the cover
5. Replace the cabin air filter.
6. Reassemble in the reverse order of
disassembly.
NOTICE
ORS091061
A : Glove box,
B : Engine compartment
Install a new cabin air filter in the
correct direction to prevent noise and
reduce effectiveness.

[Glove box: Install with the arrow
V\PEROIDFLQJGRZQZDUG

9-26
Maintenance
WIPER BLADES
Blade Inspection
Contamination of either the windshield
or the wiper blades with foreign matter
can reduce the effectiveness of the
windshield wipers.
Common sources of contamination are
insects, tree sap, and hot wax treatments
used by some commercial car washes. If
the blades are not wiping properly, clean
both the window and the blades with a
good cleaner or mild detergent, and rinse
thoroughly with clean water.
NOTICE
To prevent damage to the wiper blades,
arms or other components, do not:

[Use gasoline, kerosene, paint
thinner, or other solvents on or near
them.

[Attempt to move the wipers
manually.

[Use non-specified wiper blades.
Information
Commercial hot waxes applied by
automatic car washes have been known to
make the windshield difficult to clean.
Information
Wiper blades are consumable items.
Normal wear of the wipers may not be
covered by your vehicle warranty.
Blade Replacement
When the wipers no longer clean
adequately, the blades may be worn or
cracked, and require replacement.
NOTICE

[In order to prevent damage to the
hood and the wiper arms, the wiper
arms should only be lifted when in
the top wiping position.

[Always return the wiper arms to the
windshield before driving.
ORS091013
1. Within 20 seconds of turning off the
engine, lift up and hold the wiper
lever to the MIST position for about 2
seconds until the wipers move to the
top wipe position.
2. At this time you can lift the wipers off
the windshield.
Information
This vehicle has a “hidden” wiper design
which means that the wipers cannot be
lifted manually when they are in their
bottom resting position.