2021 HYUNDAI ELANTRA HYBRID engine overheat

Emergency Situations
8-8
WARNING
Never remove the engine coolant cap and/or inverter
coolant cap or the drain plug
while the engine and radiator
are hot.
Hot coolant and steam may blow out
under pressure, causing serious injury.
Turn the hybrid system off and wait until
the engine cools down. Use extreme
care when removing the engine coolant
cap and/or inverter coolant 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.
CAUTION
• Serious loss of coolant indicates a
leak in the cooling system and should
be checked as soon as possible by an
authorized HYUNDAI dealer.
• 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.

Maintenance
9-18
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
• When the engine overheats by low
level of the engine coolant, suddenly
adding engine coolant may cause
cracks in the engine. To prevent
damage, add engine coolant slowly
in small quantities.
• Do not drive with no engine coolant.
It may cause water pump failure and
engine seizure, etc.
Checking the Coolant Level
OCN7H090005
„„Engine coolant
OCN7H090006
„„Inverter coolant
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 the MAX and the MIN marks on
the side of the coolant reservoir when
the engine is cool.
If the coolant level is low, add the
selected anti-freeze according to the
proper coolant mix ratio to bring the level
to the MAX mark, but do not overfill. If
frequent additions are required, see an
authorized HYUNDAI dealer for a cooling
system inspection.
ENGINE COOLANT/INVERTER COOLANT

Maintenance
9-20
WARNING
Make sure the coolant cap is properly
closed after refilling coolant. Otherwise
the engine could be overheated while
driving.
„„Engine compartment front view
OOSH089010L
1. Check if the coolant cap label is
straight In front.
„„Engine compartment rear view
OCN7H090009
2. Make sure that the tiny protrusions
inside the coolant cap is 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 improper coolant mixture can
result in severe malfunction or engine
damage.
• The engine in your vehicle has
aluminum engine parts and must be
protected by an ethylene-glycol with
phosphate 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 mixing percentage, refer to the
following table:
Ambient
Temperature Mixture Percentage
(volume)
Antifreeze Water
5°F (-15°C) 3565
-13°F (-25°C) 4060
-31°F (-35°C) 5050
-49°F (-45°C) 6040
Information
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 - 31°F and
higher.

Maintenance
9-22
Checking the Hybrid Starter &
Generator (HSG) Belt
Have the Hybrid Starter & Generator
(HSG) belt inspected or replaced
according to the Maintenance Schedule
in this chapter by an authorized
HYUNDAI dealer.
CAUTION
When the HSG belt is worn out or
damaged, replace the belt.
Otherwise, it may cause engine
overheating or battery discharge.
WARNING
• Turn the vehicle off while you inspect
the engine or Hybrid Starter &
Generator (HSG) belt. Otherwise it
may result in serious injury.
• Keep hands, clothing etc. away from
the Hybrid Starter & Generator (HSG)
belt.
HYBRID STARTER & GENERATOR (HSG) BELT

Index
I-6
G
Guide to Hyundai Genuine Parts
........................................................................\
...1-3
H
Hazard Warning Flasher
........................................................................\
................8-2
HEV (Hybrid Electric Vehicle) System
.................................................................1-9
High Beam Assist (HBA)
........................................................................\
............5-76
Detecting sensor (Front view camera) .............................................................5-76
Function malfunction and limitations ..............................................................5-77
Function operation ........................................................................\
....................5-77
Function settings ........................................................................\
......................5-76
Highway Driving Assist (HDA)
........................................................................\
.7-92
Function malfunction and limitations ..............................................................7-96
Function operation ........................................................................\
....................7-94
Function settings ........................................................................\
......................7-93
Hood
........................................................................\
............................................5-62
How to Use This Manual
........................................................................\
...............1-4
Hybrid Starter & Generator (HSG) Belt
..............................................................9-22
Checking the Hybrid Starter & Generator (HSG) Belt ....................................9-22
Hyundai Motor America
........................................................................\
................1-2
I
If the 12 Volt Battery Is Discharged
......................................................................8-4
Before Jump Starting ........................................................................\
..................8-4
Jump Starting........................................................................\
.............................. 8-5
If the Engine Overheats
........................................................................\
.................8-7
If the Engine Will Not Start
........................................................................\
...........8-3
If you Have a Flat Tire (With spare tire)
.............................................................8-15
Changing Tires ........................................................................\
.........................8-16
Jack and Tools ........................................................................\
..........................8-15
Ignition Switch
........................................................................\
..............................6-4
Engine Start/Stop Button ........................................................................\
............6-7
Key Ignition Switch ........................................................................\
...................6-4
Important Safety Precautions
........................................................................\
.........3-2
Air Bag Hazards ........................................................................\
.........................3-2
Always Wear Your Seat Belt ........................................................................\
......3-2
Control Your Speed ........................................................................\
....................3-2
Driver Distraction ........................................................................\
.......................3-2