Hyundai Yeni i20 2023 Owner's Manual page 570

Maintenance
Vacuum crankcase ventilation
hoses (if equipped)
Inspect the surface of hoses for evidence
of heat and/or mechanical damage. Hard
and brittle rubber, cracking, tears, cuts,
abrasions, and excessive swelling indi-
cate deterioration. Particular attention
should be paid to examine those hose
surfaces nearest to high heat sources,
such as the exhaust manifold.
Inspect the hose routing to assure that
the hoses do not come in contact with
any heat source, sharp edges or mov-
ing component which might cause heat
damage or mechanical wear. Inspect all
hose connections, such as clamps and
couplings, to make sure they are secure,
and that no leaks are present. Hoses
should be replaced immediately if there
is any evidence of deterioration or dam-
age.
Air cleaner filter
We recommend that the air cleaner filter
be replaced by an authorized HYUNDAI
dealer.
Spark plugs
(for gasoline engine)
Make sure to install new spark plugs of
the correct heat range.
When assembling parts, be sure to wipe
out foreign substances inside and outside
of the boot bottom of the ignition coil and
the insulator of the spark plug with a soft
cloth to prevent contamination of the
spark plug insulator.
WARNING
Do not disconnect and inspect spark
plugs when the engine is hot. You may
burn yourself.
9-22
Cooling system
Check the cooling system parts, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
Engine coolant
The coolant should be changed at the
intervals specified in the maintenance
schedule.
Manual transmission fluid/
Intelligent manual transmission
system actuator fluid
(if equipped)
Inspect the manual transmission fluid/
intelligent manual transmission system
actuator fluid according to the mainte-
nance schedule.
Automatic transmission fluid
(if equipped)
Automatic transmission fluid should not
be checked under normal usage condi-
tions.
We recommend that the automatic trans-
mission fluid is changed by an authorized
HYUNDAI dealer according to the main-
tenance schedule.
i
Information
Automatic transmission fluid color is red
when new.
As the vehicle is driven, the automatic
transmission fluid will begin to look dark-
er.
This is a normal condition. It does not need
to be replaced based on the color change.