HYUNDAI I20 2022 Owners Manual

10-32
Maintenance
The high-pressure cooling system
has a reservoir filled with year-round
antifreeze coolant. The reservoir is filled
at the factory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and
before traveling to a colder climate.
NOTICE
• Do not drive with no engine coolant.
It may cause water pump failure and
engine seizure, etc.
• When the engine overheats from
low engine coolant, suddenly adding
engine coolant may cause cracks
in the engine. To prevent damage,
add engine coolant slowly in small
quantities.
Checking the coolant level
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„„Petrol Engine (1.0 T-GDi)Petrol Engine (1.0 T-GDi)
Check the condition and connections
of all cooling system hoses and
heater hoses. Replace any swollen or
deteriorated hoses.
The coolant level should be filled
between F (Full) and L (Low) marked on
the side of the coolant reservoir when
the engine is cool.
If the coolant level is low, add enough
distilled (deionized) water.
Bring the level to F (Full), but do
not overfill. If frequent additions are
required, we recommend that the
system be inspected by an authorized
HYUNDAI dealer.
ENGINE COOLANT

10-33
10
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„„Petrol Engine (1.0 T-GDi)Petrol Engine (1.0 T-GDi)
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„„Petrol Engine (Smartstream G1.2)Petrol Engine (Smartstream G1.2)
WARNING
Removing radiator cap
• Never attempt to remove the radiator
cap while the engine is operating or
hot. Doing so might lead to cooling
system and engine damage and could
result in serious personal injury from
escaping hot coolant or steam.• Turn the engine off and wait until it
cools down. Use extreme care when
removing the radiator cap. Wrap
a thick towel around it, and turn it
counterclockwise slowly to the first
stop. Step back while the pressure
is released from the cooling system.
When you are sure all the pressure
has been released, press down on the
cap, using a thick towel, and continue
turning counterclockwise to remove
it.
• Even if the engine is not operating,
do not remove the radiator cap
or the drain plug while the engine
and radiator are hot. Hot coolant
and steam may still blow out under
pressure, causing serious injury.
WARNING
The electric motor (cooling
fan) is controlled by engine
coolant temperature,
refrigerant pressure and
vehicle speed. It may
sometimes operate even when the
engine is not running. Use extreme
caution when working near the blades
of the cooling fan so that you are not
injured by a rotating fan blades. As the
engine coolant temperature decreases,
the electric motor will automatically
shut off. This is a normal condition.

10-34
Maintenance
Recommended engine coolant
• Use only soft (distilled) water in the
coolant mixture.
• The engine in your vehicle has
aluminum engine parts and must be
protected by an ethylene-glycol-based
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 mixture percentage, refer to the
following table.
Ambient
TemperatureMixture Percentage
(volume)
Antifreeze Water
-15°C (5°F)35 65
-25°C (-13°F)40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40

WARNING
Radiator cap
Do not remove the radiator
cap when the engine and
radiator are hot. Scalding
hot coolant and steam
may blow out under pressure causing
serious injury.
Changing the coolant
We recommend that the coolant be
replaced by an authorized HYUNDAI
dealer.
NOTICE
Put a thick cloth or fabric around the
radiator cap before refilling the coolant
in order to prevent the coolant from
overflowing into engine parts such as
the alternator.
WARNING
Coolant
• Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
• Radiator coolant can severely
obscure visibility when sprayed on
the windshield and may cause loss
of vehicle control or damage to paint
and body trim.

10-35
10
Checking the brake/clutch fluid
level
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Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX (Maximum) and MIN
(Minimum) marks on the side of the
reservoir.
Before removing the reservoir cap
and adding brake/clutch fluid, clean
the area around the reservoir cap
thoroughly to prevent brake/clutch fluid
contamination. If the level is low, add
fluid to the MAX (Maximum) level. The
level will fall with accumulated mileage.
This is a normal condition associated
with the wear of the brake linings and/or
clutch disc (if equipped).
If the fluid level is excessively low, we
recommend that the system be checked
by an authorized HYUNDAI dealer.
Use only the specified brake/clutch fluid.
(Refer to “Recommended lubricants or
capacities” in chapter 2.)
Never mix different types of fluid.
WARNING
Loss of brake fluid
In the event the brake system
requires frequent additions of fluid,
we recommend that the system be
inspected by an authorized HYUNDAI
dealer.
i Information
Before removing the brake/clutch filter
cap, read the warning on the cap.
WARNING
Clean filler cap before removing. Use
only DOT 4 brake/clutch fluid from a
sealed container.
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10-36
Maintenance
WARNING
Brake/clutch fluid
When changing and adding brake/
clutch fluid, handle it carefully. Do not
let it come in contact with your eyes.
If brake/clutch fluid come in contact
with your eyes, immediately flush them
with a large quantity of fresh tap water.
Have your eyes examined by a doctor
as soon as possible.
NOTICE
Do not allow brake/clutch fluid to
contact the vehicle’s body paint, as
paint damage will result.
Brake/clutch fluid, which has been
exposed to open air for an extended
time should never be used as its quality
cannot be guaranteed. It should be
properly disposed. Don’t put in the
wrong kind of fluid. A few drops of
mineral-based oil, such as engine oil, in
your brake/clutch system can damage
brake/clutch system parts.

10-37
10
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10-38
Maintenance
Checking the washer fluid level
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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
Coolant
• Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
• Radiator coolant can severely
obscure visibility when sprayed on
the windshield and may cause loss
of vehicle control or damage to the
paint and body trim.
• Windshield washer fluid agents
contain some amounts of alcohol
and can be flammable under certain
circumstances. Do not allow sparks
or flame come in contact with the
washer fluid or the washer fluid
reservoir. Damage to the vehicle or
occupants could occur.
• Windshield washer fluid is poisonous
to humans and animals. Do not drink
and avoid coming in contact with
the windshield washer fluid. Serious
injury or death could occur.
WASHER FLUID

10-39
10
Checking the parking brake
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Check the stroke of the parking brake by
counting the number of “clicks’’ heard
while fully applying it from the released
position.
Also, the parking brake alone should
securely hold the vehicle on a fairly
steep grade. If the stroke is more or less
than specified, we recommend that the
system be inspected by an authorized
HYUNDAI dealer.
Stroke : 5~7 “clicks’’ at a force of 20 kg
(44 lbs, 196 N).
PARKING BRAKE

10-40
Maintenance
Draining water from fuel filter
The fuel filter for diesel engine plays an
important role of separating water from
fuel and accumulating the water in its
bottom.
If water accumulates in the fuel filter,
the warning light comes on when the
ignition switch is in the ON position.
If this warning light turned
on, we recommend that the
system be serviced by an
authorized HYUNDAI dealer.
NOTICE
If the water accumulated in the fuel
filter is not drained at proper times,
damages to the major parts such as the
fuel system can be caused by water
permeation in the fuel filter.
Fuel filter cartridge replacement
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When replacing the fuel filter cartridge,
we recommend that you use parts
for replacement from an authorized
HYUNDAI dealer.
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10-41
10
AIR CLEANER
Filter replacement
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The air cleaner filter can be cleaned for
inspection using compressed air.
Do not attempt to wash or to rinse it, as
water will damage the filter.
If soiled, the air cleaner filter must be
replaced.
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1. Loosen the air cleaner cover attaching
clips and open the cover.
2. Wipe the inside of the air cleaner.
3. Replace the air cleaner filter.
4. Lock the cover with the cover
attaching clips.
5. Check that the cover is firmly
installed.