2021 HYUNDAI I20 maintenance

10-30
Maintenance
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If it is near or at L, add enough oil to
bring the level to F. Do not overfill.
Use only the specified engine oil.
• If exceeding the maintenance
schedule for replacement of engine
oil, the engine oil performance
may deteriorate and the engine
condition may be affected. Therefore,
the replacement cycle should be
observed.
• If not using the recommended oil,
replace it according to the severe
usage maintenance conditions.
(Refer to “Recommended lubricants
and capacities” in chapter 2.)
WARNING
Radiator hose
Be very careful not to touch the
radiator hose when checking or adding
engine oil as it may be hot enough to
burn you.
CAUTION
• Do not spill engine oil, when adding
or changing engine oil. If you drop
the engine oil on the engine room,
wipe it off immediately.
• When you wipe the oil level gauge,
you should wipe it with a clean cloth.
When mixed with debris, it can cause
engine damage.

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

10-34
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.

10-36
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.

10-38
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

10-40
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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10-42
Maintenance
i Information
If the vehicle is operated in extremely
dusty or sandy areas, replace the element
more often than the usual recommended
intervals (refer to “Maintenance Under
Severe Usage Conditions” 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.
• Use HYUNDAI genuine parts or the
equivalent specified for your vehicle.
Use of non-genuine parts could
damage the air flow sensor.

10-43
10
Filter inspection
If the vehicle is operated in the severely
air-polluted cities or on dusty rough
roads for a long period, it should be
inspected more frequently and replaced
earlier. When you, the owner, replace
the climate control air filter, replace it
performing the following procedure,
and be careful to avoid damaging other
components.
Replace the filter according to the
maintenance Schedule.
Filter replacement
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1. Open the glove box.
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2. Push in both sides of the glove box as
shown. This will ensure that the glove
box stopper pins will get released
from its holding location allowing the
glove box to hang.
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3. Remove the climate control air filter
cover by pushing or pressing the clip
(1) on right side.
CLIMATE CONTROL AIR FILTER