HYUNDAI I20 2023 Owners Manual
Page 571 of 649
9-12
Maintenance
Dual clutch transmission fluid
(if equipped)
Inspect the dual clutch transmission
fluid according to the maintenance
schedule.
% U D N H K R V H V D Q G O L Q H V
Visually check for proper installation,
chafing, cracks, deterioration and any
leakage. Replace any deteriorated or
damaged parts immediately.
% U D N H F O X W F K I O X L G L I H T X L S S H G
Check brake/clutch fluid level in the
brake fluid reservoir. The level should
be between “MIN” (Minimum) and
“MAX” (Maximum) marks on the side
of the reservoir. Use only hydraulic
brake/clutch fluid conforming to DOT 4
specification.
Parking brake
Inspect the parking brake system
including the parking brake lever and
cables.
Rear brake drums and linings
(if equipped)
Check the rear brake drums and linings
for scoring, burning, leaking fluid,
broken parts, and excessive wear.
% U D N H S D G V F D O L S H U V D Q G U R W R U V
Check the pads for excessive wear, discs
for run out and wear, and calipers for
fluid leakage.
For more information on checking the
pads or lining wear limit, refer to the
HYUNDAI web site.
(http://service.hyundai-motor.com)
Suspension mounting bolts
Check the suspension connections for
looseness or damage. Retighten to the
specified torque.
Steering gear box, linkage &
boots/lower arm ball joint
With the vehicle stopped and engine
off, check for excessive free-play in the
steering wheel.
Check the linkage for bends or damage.
Check the dust boots and ball joints
for deterioration, cracks, or damage.
Replace any damaged parts.
Drive shafts and boots
Check the drive shafts, boots and
clamps for cracks, deterioration, or
damage. Replace any damaged parts
and, if necessary, repack the grease.
Air conditioning refrigerant/
compressor
Check the air conditioning lines and
connections for leakage and damage.
Page 572 of 649
9-13
09
ENGINE OIL
Engine oil is used for lubricating,
cooling, and operating various hydraulic
components in the engine. Engine oil
consumption whilst driving is normal,
and it is necessary to check and refill the
engine oil regularly. Also, check and refill
the oil level within the recommended
maintenance schedule to prevent
deterioration of oil performance.
Check the engine oil following the below
procedure.
Checking the engine oil level
„Smartstream G 1.0 T-GDi/ Smartstream G1.0 T-GDi (48V) MHEV
OBC3090008
„Smartstream G1.2
OBC3090009
„Petrol 1.4
OBC3090010
1. Follow all of the oil manufacturer’s
precautions.
2. Be sure the vehicle is on the level
ground in P (Park) with the parking
brake set and the wheels blocked.
3. Turn the engine on and warm
the engine up until the coolant
temperature reaches a constant
normal temperature.
4. Turn the engine off, remove the oil
filler cap and pull the dipstick out.
Wait for 15 minutes for the oil to
return to the oil pan.
5. Wipe the dipstick clean and re-insert
it fully.
6. Pull the dipstick out again and check
the level. The level should be between
the F-L line.
Page 573 of 649
9-14
Maintenance
„Smartstream G 1.0 T-GDi/ Smartstream G1.0 T-GDi (48V) MHEV
OBC3090011
„Smartstream G1.2
OBC3090013
„Petrol 1.4
OBC3090013R
7. If the oil level is below the L, add
enough oil to bring the level to F.
Use only the specified engine oil (Refer
to “Recommended Lubricants and
Capacities” section in chapter 2).
NOTICE
To prevent damage to your engine:
[ Do not spill engine oil when adding or
changing engine oil. Wipe off spilled
oil immediately.
[ The engine oil consumption may
increase whilst you break in a new
vehicle and it will be stabilized after
driving 6,000 km (4,000 miles).
[ The engine oil consumption can be
affected by driving habits, climate
conditions, traffic conditions,
oil quality, etc. Therefore, it is
recommended that you inspect the
engine oil level regularly and refill it if
necessary.
Page 574 of 649
9-15
09
Checking the engine oil and
filter
[ We recommend that the engine oil
and filter be replaced by a HYUNDAI
authorised repairer.
[ If the maintenance schedule to
replace engine oil is exceeded,
the engine oil performance may
deteriorate, and the engine condition
may be affected. Therefore, replace
the engine oil according to the
maintenance schedule.
[ To keep the engine in optimal
condition, use the recommended
engine oil and filter. If the
recommended engine oil and filter are
not used replace it according to the
maintenance schedule under severe
usage conditions.
[ The purpose of the maintenance
schedule for engine oil replacement
is to prevent oil deterioration and it is
irrelevant to oil consumption. Check
and refill engine oil regularly.
WARNING
Used engine oil may cause irritation or
cancer of the skin if left in contact with
the skin for prolonged periods of time.
Used engine oil contains chemicals
that have caused cancer in laboratory
animals. Always protect your skin
by washing your hands thoroughly
with soap and warm water as soon as
possible after handling used oil.
i Information
: K H Q W K H R L O S U H V V X U H L V O R Z G X H W R
L Q V X I I L F L H Q W H Q J L Q H R L O W K H ( Q J L Q H 2 L O
3 U H V V X U H
Z D U Q L Q J O L J K W Z L O O
L O O X P L Q D W H , Q D G G L W L R Q W K H H Q K D Q F H G
H Q J L Q H S U R W H F W L R Q V \ V W H P Z K L F K O L P L W V
W K H H Q J L Q H
Page 575 of 649
9-16
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 concentration level at least once
a year, at the beginning of the winter
season, and before travelling to a colder
climate.
NOTICE
[ : K H Q W K H H Q J L Q H R Y H U K H D W V I U R P
low engine coolant, suddenly adding
engine coolant may cause cracks
in the engine. To prevent damage,
add engine coolant slowly in small
quantities.
[ ' R Q R W G U L Y H Z L W K Q R H Q J L Q H F R R O D Q W
It may cause water pump failure and
engine seizure, etc.
Checking the coolant level
OBC3090014
„Type A
„Type B
OBC3090061
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 a HYUNDAI
authorised repairer.
ENGINE COOLANT
Page 576 of 649
9-17
09
OBC3090006
„Type A
„Type B
OBC3090007
WARNING
Do not remove a radiator cap/
engine coolant reservoir cap.
[ Never attempt to remove the radiator
cap/engine coolant reservoir cap
whilst the engine is operating or hot.
[ Doing so might lead to cooling
system failure 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/
engine coolant reservoir cap. Wrap
a thick towel around it, and turn it
counterclockwise slowly to the first
stop. Step back whilst 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/
engine coolant reservoir cap or the
drain plug whilst 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.
The electric motor (cooling fan) may
operate until you disconnect the
negative battery cable.
Page 577 of 649
9-18
Maintenance
WARNING
OBC3090015
1. Check if the radiator cap label is
straight In front.
2. Make sure that the tiny protrusions
inside the radiator cap should be
securely interlocked.
Recommended engine coolant
[ When adding coolant, use only
distilled (deionized) water for your
vehicle and never mix hard water in
the coolant filled at the factory. An
incorrect coolant mixture can result
in serious malfunction or engine
damage.
[ The engine in your vehicle has
aluminium 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 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
i Information
, I L Q G R X E W D E R X W W K H P L [ U D W L R D
Z D W H U D Q G D Q W L I U H H ] H P L [ L V W K H
H D V L H V W W R P L [ W R J H W K H U D V L W Z L O O E H W K H
V D P H T X D Q W L W \ R I H D F K , W L V V X L W D E O H W R
X V H I R U P R V W W H P S H U D W X U H U D Q J H V R I
Page 578 of 649
9-19
09
Changing the engine coolant
We recommend that coolant be changed
by an authorised HYUNDAI according to
the Maintenance Schedule.
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
alternator.
WARNING
Do not use engine coolant or antifreeze
in the washer fluid reservoir.
Engine coolant can severely obscure
visibility when sprayed on the
windscreen and may cause loss of
vehicle control resulting in an accident.
Engine coolant may also cause damage
to paint and body trim.
Page 579 of 649
9-20
Maintenance
Checking the brake/clutch fluid
level
OBC3090016R
Check the fluid level in the reservoir
periodically. The fluid level should be
between MAX and MIN marks on the left
or right 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
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,
we recommend that the system be
checked by a HYUNDAI authorised
repairer.
i Information
8 V H R Q O \ W K H V S H F L I L H G E U D N H F O X W F K I O X L G
5 H I H U W R
Page 580 of 649
9-21
09
WARNING
Do not allow brake/clutch fluid to come
in contact with your eyes. If brake/
clutch fluid comes in contact with
your eyes, flush your eyes with clean
water for at least 15 minutes and get
immediate medical attention.
NOTICE
[ ' R Q R W D O O R Z E U D N H F O X W F K I O X L G W R
contact the vehicle’s body paint, as
paint damage will result.
[ % U D N H F O X W F K I O X L G Z K L F K K D V E H H Q
exposed to open air for an extended
time should never be used as its
quality cannot be guaranteed. It
should be disposed of properly.
[ ' R QT W S X W L Q W K H Z U R Q J N L Q G R I I O X L G $
few drops of mineral-based oil, such
as engine oil, in your brake/clutch
system can damage system parts.