2021-2024 Hyundai Bayon SUV Maintenance -> Engine coolant User Manual
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Maintenance -> Engine coolant for Your Hyundai Bayon SUV Second Generation (2021-2024)

Maintenance  
ENGINE COOLANT  
The high-pressure cooling system has  
a reservoir filled with year-round anti-  
freeze coolant. The reservoir is filled at  
the factory.  
Checking the coolant level  
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  
OAC3089005TU  
• When the engine overheats from  
low engine coolant, suddenly add-  
ing engine coolant may cause  
cracks in the engine. To prevent  
damage, add engine coolant slow-  
ly in small quantities.  
Check the condition and connections of  
all cooling system hoses and heater  
hoses. Replace any swollen or deterio-  
rated hoses.  
The coolant level should be filled be-  
tween F (Full) and L (Low) marked on  
the side of the coolant reservoir when  
the engine is cool.  
• Do not drive with no engine cool-  
ant. It may cause water pump fail-  
ure and engine seizure, etc.  
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 re-  
quired, we recommend that the system  
be inspected by a HYUNDAI authorised  
repairer.  
9-14  
09  
Recommended engine coolant  
• When adding coolant, use only dis-  
tilled (deionized) water for your vehi-  
cle and never mix hard water in the  
coolant filled at the factory. An incor-  
rect coolant mixture can result in seri-  
ous malfunction or engine damage.  
• The engine in your vehicle has alu-  
minium 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 re-  
duce the effectiveness of the solu-  
tion.  
OAC3089006TU  
WARNING  
Never remove the radiator  
cap or the drain plug  
whilst the engine and ra-  
diator are hot. Hot coolant  
and steam may blow out  
under pressure, causing serious in-  
jury.  
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 cool-  
ing system. When you are sure all  
the pressure has been released,  
press down on the cap, using a thick  
towel, and continue turning counter-  
clockwise to remove it.  
For mixture percentage, refer to the fol-  
lowing table.  
Mixture Percentage  
(volume)  
Ambient  
Temperature  
Antifreeze  
Water  
65  
35  
40  
50  
60  
-15°C (5°F)  
-25°C (-13°F)  
-35°C (-31°F)  
-45°C (-49°F)  
60  
50  
40  
WARNING  
Information  
i
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.  
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  
-35°C (-31°F) and higher.  
Keep hands, clothing and tools away  
from the rotating fan blades of the  
cooling fan.  
9-15  
Maintenance  
Changing the engine coolant  
We recommend that the coolant be re-  
placed by a HYUNDAI authorised re-  
pairer.  
NOTICE  
Put a thick cloth or fabric around the  
radiator cap before refilling the cool-  
ant in order to prevent the coolant  
from overflowing into engine parts  
such as alternator.  
WARNING  
Do not use engine coolant or anti-  
freeze in the washer fluid reservoir.  
Engine coolant can severely ob-  
scure visibility when sprayed on the  
windscreen and may cause loss of  
vehicle control or damage to paint  
and body trim.  
9-16  

Related Topics

Engine compartment Maintenance services Owner?s responsibility Owner maintenance precautions Owner maintenance Owner maintenance schedule Scheduled maintenance services Explanation of scheduled maintenance items Engine oil Checking the engine oil level Checking the engine oil and filter Checking the coolant level Changing the engine coolant Brake/Clutch fluid Checking the brake/clutch fluid level Washer fluid Checking the washer fluid level Parking brake Air cleaner Climate control air filter Filter inspection Filter replacement Wiper blades Blade inspection Blade replacement Battery For best battery service Battery capacity label Battery recharging Reset items Tyres and wheels Tyre care Recommended cold tyre inflation pressures Check tyre inflation pressure Tyre rotation Wheel alignment and tyre balance Tyre replacement Wheel replacement Tyre traction Tyre maintenance Tyre sidewall labelling Low aspect ratio tyres Fuses Instrument panel fuse replacement Engine compartment panel fuse replacement Fuse/relay panel description Light bulbs Headlight, position light, turn signal light, fog light and daytime running light, low beam assist-static light bulb replacement Headlight and front fog light aiming Side repeater light replacement Rear combination light bulb replacement High mounted stop light replacement License plate light bulb replacement Interior light bulb replacement Appearance care Exterior care Interior care Emission control system 1. Crankcase emission control system 2. Evaporative emission control system 3. Exhaust emission control system

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