2023 HYUNDAI I20 radiator cap

2-12
Vehicle information
ENGINE COMPARTMENT
1. Engine coolant reservoir .............................................................................................................. 9-16
2. Engine oil filler cap ...................................................................................................................... 9-14
3. Brake/Clutch* fluid reservoir ......................................................................................................9-20
4. Air cleaner .................................................................................................................................... 9-24
5. Fuse box .......................................................................................................................................9-42
6. Battery ..........................................................................................................................................9-29
7. Windsreen washer fluid reservoir ............................................................................................... 9-23
8. Radiator cap ..................................................................................................................................9-17
9. Engine oil dipstick ....................................................................................................................... 9-13
The actual engine room in the vehicle may differ from the illustration.
OBC3090001R
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2-13
02
1. Engine coolant reservoir .............................................................................................................. 9-16
2. Engine oil filler cap ...................................................................................................................... 9-14
3. Brake/Clutch* fluid reservoir ......................................................................................................9-20
4. Air cleaner .................................................................................................................................... 9-24
5. Fuse box .......................................................................................................................................9-42
6. Battery ..........................................................................................................................................9-29
7. Windsreen washer fluid reservoir ............................................................................................... 9-23
8. Radiator cap ..................................................................................................................................9-17
9. Engine oil dipstick ....................................................................................................................... 9-13
The actual engine room in the vehicle may differ from the illustration.
OBC3090003R
„Smartstream G1.2

2-14
Vehicle information
1. Engine coolant reservoir .............................................................................................................. 9-16
2. Engine oil filler cap ...................................................................................................................... 9-14
3. Brake/Clutch* fluid reservoir ......................................................................................................9-20
4. Air cleaner .................................................................................................................................... 9-24
5. Fuse box .......................................................................................................................................9-42
6. Battery ..........................................................................................................................................9-29
7. Windsreen washer fluid reservoir ............................................................................................... 9-23
8. Radiator cap ..................................................................................................................................9-17
9. Engine oil dipstick ....................................................................................................................... 9-13
The actual engine room in the vehicle may differ from the illustration.
OBC3090004R
„3HWURO

4-6
Instrument cluster
Engine Coolant Temperature Gauge
„3.5-Inch
OBC3040007/OBC3040008
„10.25-Inch
This gauge indicates the temperature
of the engine coolant when the ignition
switch is in the ON position.
NOTICE
If the gauge pointer moves beyond the
normal range area toward the “130”
position, it indicates overheating that
may damage the engine.
Do not continue driving with an
overheated engine. If your vehicle
overheats, refer to “If the Engine
Overheats” in chapter 8.
WARNING
Never remove the radiator cap or
reservoir cap when the engine is hot.
The engine coolant is under pressure
and could cause severe burns. Wait
until the engine is cool before adding
coolant to the reservoir.
Fuel Gauge
„3.5-Inch
OBC3040009/OCN7040011L
„10.25-Inch
This gauge indicates the approximate
amount of fuel remaining in the fuel
tank.
i Information

8-9
08
If your temperature gauge indicates
overheating, you experience a loss of
power, or hear loud pinging or knocking,
the engine may be overheating. If this
happens, you should:
1. Pull off the road and stop as soon as it
is safe to do so.
2. Place the shift lever in P (Park, for
automatic transmission/dual clutch
transmission vehicle) or neutral (for
manual transmission/dual clutch
transmission vehicle) and set the
parking brake. If the air conditioning is
ON, turn it OFF.
3. If engine coolant is running out under
the vehicle or steam is coming out
from the bonnet, stop the engine. Do
not open the bonnet until the coolant
has stopped running or the steaming
has stopped. If there is no visible
loss of engine coolant and no steam,
leave the engine running and check
to be sure the engine cooling fan is
operating. If the fan is not running,
turn the engine off.
WARNING
Whilst the engine is
running, keep hands,
clothing and tools away
from the moving parts such
as the cooling fan and drive
belt to prevent serious
injury.4. Check for coolant leaking from the
radiator, hoses or under the vehicle. (If
the air conditioning had been in use, it
is normal for cold water to be draining
from it when you stop.)
5. If engine coolant is leaking out, stop
the engine immediately and we
recommend that you call a HYUNDAI
authorised repairer for assistance.
WARNING
NEVER remove the radiator
cap or the drain plug whilst
the engine and radiator are
hot. Hot coolant and steam
may blow out under
pressure, causing serious injury.
Turn the engine off and wait until the
engine 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 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.
IF THE ENGINE OVERHEATS

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.

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
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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.