2021 HYUNDAI I20 engine coolant

9-8
Emergency situations
6. If you cannot find the cause of the
overheating, wait until the engine
temperature has returned to normal.
Then, if coolant has been lost,
carefully add coolant to the reservoir
to bring the fluid level in the reservoir
up to the halfway mark.
7. Proceed with caution, keeping alert
for further signs of overheating.
If overheating happens again,
we recommend that you call an
authorized HYUNDAI dealer for
assistance.
NOTICE
• Serious loss of coolant indicates a
leak in the cooling system and we
recommend the system be checked
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.

Engine compartment .................................................................................... 10-4
Maintenance services
................................................................................... 10-6
Owner’s responsibility ............................................................................................ 10-6
Owner maintenance precautions........................................................................... 10-6
Owner maintenance ..................................................................................... 10-8
Owner maintenance schedule ............................................................................... 10-8
Scheduled maintenance service ................................................................ 10-10
Normal maintenance schedule - petrol engine .................................................... 10-11
Maintenance under severe usage conditions - petrol engine
............................ 10-15
Normal maintenance schedule - diesel engine ....................................................10-17
Maintenance under severe usage conditions - diesel engine ............................10-20
Explanation of scheduled maintenance items ..........................................10-24
Engine oil
..................................................................................................... 10-26
Checking the engine oil level (Petrol Engine) .......................................................10-28
Checking the engine oil level (Diesel Engine) ......................................................10-29
Changing the engine oil and filter
......................................................................... 10-31
Engine coolant .............................................................................................10-32
Checking the coolant level .................................................................................... 10-32
Recommended engine coolant .............................................................................10-34
Changing the coolant
............................................................................................10-34
Brake/clutch fluid ........................................................................................10-35
Checking the brake/clutch fluid level ................................................................... 10-35
Intelligent Manual Transmission (iMT) System actuator fluid .................. 10-37
Checking the iMT system actuator fluid level ...................................................... 10-37
Washer fluid ................................................................................................ 10-38
Checking the washer fluid level ............................................................................10-38
Parking brake .............................................................................................. 10-39
Checking the parking brake ..................................................................................10-39
Fuel filter (for diesel) ................................................................................... 10-40
Draining water from fuel filter .............................................................................. 10-40
Fuel filter cartridge replacement
......................................................................... 10-40
Air cleaner .................................................................................................... 10-41
Filter replacement .................................................................................................. 10-41
Climate control air filter.............................................................................. 10-43
Filter inspection ..................................................................................................... 10-43
Filter replacement ................................................................................................. 10-43
10. Maintenance
10

10-4
Maintenance
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake/clutch* fluid reservoir
4. Air cleaner
5. Fuse box 6. Battery
7. Windshield washer fluid reservoir
8. Radiator cap
9. Engine oil dipstick
ENGINE COMPARTMENT
The actual engine room in the vehicle may differ from the illustration.
OBI3090001/OBC3090003ROBI3090001/OBC3090003R
„„Petrol Engine (Kappa 1.0 T-GDI)Petrol Engine (Kappa 1.0 T-GDI)
„„Petrol Engine (Smartstream G1.2)Petrol Engine (Smartstream G1.2)

10-5
10
1. Engine coolant reservoir
2. Engine oil filler cap
3. Brake/clutch* fluid reservoir
4. Air cleaner
5. Fuse box 6. Battery
7. Windshield washer fluid reservoir
8. Radiator cap
9. Engine oil dipstick
10. Fuel filter

„„(Diesel) 1.5 WGT(Diesel) 1.5 WGT
The actual engine room in the vehicle may differ from the illustration.
OBI3090002OBI3090002

10-8
Maintenance
The following lists are vehicle checks
and inspections that should be
performed at the frequencies indicated
to help ensure safe, dependable
operation of your vehicle.
Any adverse conditions should be
brought to the attention of your dealer
as soon as possible.
These Owner Maintenance Checks are
generally not covered by warranties and
you may be charged for labor, parts and
lubricants used.
WARNING
Diesel Engine
Never manipulate or modify the
injection system while running the
diesel engine or within 30 seconds
after turning OFF the diesel engine. The
high-pressure pump, high-pressure
pipes, rail, and injectors are still subject
to high pressure immediately after
stopping the diesel engine.
When the fuel leakage vents out, it
may cause serious body injury. Any
people, who are implanted with the
artificial cardiac pacemaker, should
remain away from the ECU or the
wiring harness by at least 30 cm,
while running the diesel engine. The
high currents of the electronic engine
control system produce a considerable
amount of magnetic fields.
Owner maintenance schedule
When you stop for fuel:
• Check the engine oil level.
• Check the coolant level in coolant
reservoir.
• Check the windshield washer fluid
level.
• Look for low or under-inflated tires.
• Check the radiator and condenser.
Check if the front of the radiator and
condenser are clean and not blocked
with leaves, dirt or insects etc.
If any of the above parts are extremely
dirty or you are not sure of their
condition, we recommend that you
contact an authorized HYUNDAI
dealer.
WARNING
Be careful when checking your engine
coolant level when the engine is hot.
Scalding hot coolant and steam may
blow out under pressure. This could
cause burns or other serious injury.
OWNER MAINTENANCE

10-9
10
While operating your vehicle:
• Note any changes in the sound of the
exhaust or any smell of exhaust fumes
in the vehicle.
• Check for vibrations in the steering
wheel. Notice any increased steering
effort or looseness in the steering
wheel, or change in its straight-ahead
position.
• Notice if your vehicle constantly turns
slightly or “pulls” to one side when
traveling on smooth, level road.
• When stopping, listen and check for
unusual sounds, pulling to one side,
increased brake pedal travel or “hard-
to-push” brake pedal.
• If any slipping or changes in the
operation of your transmission occurs,
check the transmission fluid level.
• Check the parking brake.
• Check for fluid leaks under your
vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:
• Check the coolant level in the engine
coolant reservoir.
• Check the operation of all exterior
lights, including the stoplights, turn
signals and hazard warning flashers.
• Check the inflation pressures of all
tires including the spare for tires that
are worn, show uneven wear, or are
damaged.
• Check for loose wheel lug nuts.
At least twice a year
(i.e., every Spring and Fall):
• Check the radiator, heater and air
conditioning hoses for leaks or
damage.
• Check the windshield washer spray
and wiper operation. Clean wiper
blades with clean cloth dampened
with washer fluid.
• Check the headlight alignment.
• Check the muffler, exhaust pipes,
shields and clamps.
• Check the lap/shoulder belts for wear
and function.
At least once a year:
• Clean the body and door drain holes.
• Lubricate the door hinges and checks,
and hood hinges.
• Lubricate the door and hood locks and
latches.
• Lubricate the door rubber
weatherstrips.
• Check the air conditioning system.
• Inspect and lubricate Automated
manual transmission linkage and
controls.
• Clean the battery and terminals.
• Check the brake/clutch fluid level.

10-12
Maintenance
MAINTENANCE
INTERVALS
MAINTENANCE ITEMNumber of months or driving distance, whichever comes first
Kmsx1,000
1.51020304050607080
Months
2 1224364860728496
Years
- 12345678
ENGINE BAY
Engine oil & filter *
1 *2 *3
I RRRRRRRR
Drive beltAt first, Inspect 90,000km or 72 months after that,
Inspect every 30,000km or 24 month
Air cleaner filter 1.0 T-GDI C C R C R C R C C
S
martstream G1.2
CCCRCCRCC
Battery condition & specific gravity IIIIIIIII
Spark Plugs *
10
1.0 T-GDI Replace at every 70,000 kmsSmartstream G1.2
Replace at every 150,000 kms
Valve clearance *
4
Inspect at every 90,000 kms or 108 months
Vaccum Hose - - - I - - I - I
Idler / damper pulley/Adj. Bolt Inspect when replacing the drive belt or timing belt/chain
Brake/Clutch fluid Replace @ every 40,000 kms or 3 years
Engine Coolant (topup & specify gravity) *
5
Inspect at every service;
Replace first at 100,000 Km or 60 months ; then at every 30,000 Km or 24 months
Manual transaxle fluid *
6
------ I --
Dual Clutch transaxle fluid (if equipped)*
6
------ I --
MT system actuator fluid (if equipped) *
6
-R-R R-R
Intelligent Var. transaxle fluid (if equipped)*
6
-- -- I ---
I : Inspect and if necessary adjust,top-up, clean or replaceC : Clean and Replace if necessary R : Replace
NORMAL MAINTENANCE SCHEDULE - PETROL ENGINE (CONT.)

10-18
Maintenance
MAINTENANCE
INTERVALS
MAINTENANCE ITEMNumber of months or driving distance, whichever comes first
Kmsx1,000
1.51020304050607080
Months
2 1224364860728496
Years
- 12345678
ENGINE BAY
Engine oil & filter *
1 *2 *3
I RRRRRRRR
Drive beltAt first, inspect every 80,000km (50,000miles) or 48months :
after that, inspect every 20,000km (12,500miles) or 12months
Air cleaner filter - C R C R C R C
Battery condition & specific gravityIIIIIIIII
Valve clearance*
4
Inspect at every 90,000 kms or 108 months
Hoses (Vaccum/ EGR / VGT/ WGT) -IIIIIIII
Idler / damper pulley/Adj. Bolt Inspect when replacing the drive belt or timing belt/chain
Brake/Clutch fluid Inspect @ Every service ; Replace @ every 45,000 km or 3 years
Engine Coolant (topup & specify gravity) *
5
Inspect at every service;
Replace first at 120,000 Km or 120 months ; then at every 30,000 Km or 24 months
Manual transaxle fluid *
6
------ I - I
Dual Transmission fluid (if equipped) *
6
No Check ; No Service reqd.
NORMAL MAINTENANCE SCHEDULE - DIESEL ENGINE
C : Clean and Replace if necessary I : Inspect and if necessary adjust,top-up, clean or replace
R : Replace