2016 Hyundai Sonata spark plugs

5-66
Driving your vehicle
Check battery and cables
Winter puts additional burdens on
the battery system.Visually inspect
the battery and cables as
described in chapter 7.We recom-
mend that the level of charge in your
battery be checked by an authorised
HYUNDAI dealer.
Change to "winter weight" oil if
necessary
In some climates it is recommended
that a lower viscosity "winter weight"
oil be used during cold weather. See
section 8 for recommendations. If
you aren't sure what weight oil you
should use, we recommend that you
consult an authorised HYUNDAI
dealer.Check spark plugs and ignition
system
Inspect your spark plugs as
described in section 7 and replace
them if necessary. Also check all
ignition wiring and components to be
sure they are not cracked, worn or
damaged in any way.
To keep locks from freezing
To keep the locks from freezing,
squirt an approved de-icer fluid or
glycerine into the key opening. If a
lock is covered with ice, squirt it with
an approved de-icing fluid to remove
the ice. If the lock is frozen internally,
you may be able to thaw it out by
using a heated key. Handle the heat-
ed key with care to avoid injury.Use approved window washer
anti-freeze in system
To keep the water in the window
washer system from freezing, add an
approved window washer anti-freeze
solution in accordance with instruc-
tions on the container. Window wash-
er anti-freeze is available from an
authorised HYUNDAI dealer and
most auto parts outlets. Do not use
engine coolant or other types of anti-
freeze as these may damage the
paint finish.

7-11
7
Maintenance
NORMAL MAINTENANCE SCHEDULE (CONT.)
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*
4: For your convenience, it can be replaced prior to it's interval when you do maintenance of other items.
*5: Inspect for excessive valve noise and/or engine vibration and adjust if necessary. We recommend that the system be checked
by an authorised HYUNDAI dealer.
*
6: The fuel filter is considered to be maintenance free but periodic inspection is recommended for this maintenance schedule
depends on fuel quality. If there are some important matters like fuel flow restriction, surging, loss of power, hard starting prob-
lems etc, we recommend replacing the fuel filter immediately regardless of maintenance schedule and consulting with an autho-
rised HYUNDAI dealer for details.
Number of months or driving distance, whichever comes first
Months1224364860728496
Km×1,000153045607590105120
Spark plugs *4Theta 2.4 GDIReplace every 150,000 km or 120 months
Theta 2.0 T-GDIReplace every 75,000 km or 60 months
Valve clearance *5I
Vapour hose and fuel filler capII
Fuel tank air filter (if equipped)II
Vacuum hoseIIIIIIII
Fuel filter *6RR
Fuel lines, hoses and connectionsII
MAINTENANCE
INTERVALS
MAINTENANCE
ITEM

Maintenance
7-14
MAINTENANCE UNDER SEVERE USAGE CONDITIONS
The following items must be serviced more frequently on vehicles mainly used under severe driving conditions.
Refer to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and if necessary, adjust, correct, clean or replace
Maintenance itemMaintenance
operationMaintenance intervalsDriving condition
Engine oil and
engine oil filterTheta 2.4 GDIRReplace every 7,500 km or 6 monthsA, B, C, D, E,
F, G, H, I, J, K, L
Theta 2.0 T-GDIRReplace every 5,000 km or 3 months
Air cleaner filterRReplace more frequently
depending on the conditionC, E
Spark plugs RReplace more frequently
depending on the conditionA, B, H, I
Steering gear rack, linkage and bootsIInspect more frequently
depending on the conditionC, D, E, F, G
Front suspension ball jointsIInspect more frequently
depending on the conditionC, D, E, F, G

7-17
7
Maintenance
Vacuum crankcase ventilation
hoses (if equipped)
Inspect the surface of hoses for evi-
dence of heat and/or mechanical
damage. Hard and brittle rubber,
cracking, tears, cuts, abrasions, and
excessive swelling indicate deterio-
ration. 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 con-
tact with any heat source, sharp
edges or moving component which
might cause heat damage or mechan-
ical wear. Inspect all hose connec-
tions, 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 damage.
Air cleaner filter
We recommend that the air cleaner
filter be replaced by an authorised
HYUNDAI dealer.
Spark plugs
Make sure to install new spark plugs
of the correct heat range.
Valve clearance (Theta Engine)
Inspect excessive valve noise and/or
engine vibration and adjust if neces-
sary. We recommend that the system
be serviced by an authorised
HYUNDAI dealer.
Cooling system
Check the cooling system parts,
such as radiator, coolant reservoir,
hoses and connections for leakage
and damage. Replace any damaged
parts.
Coolant
The coolant should be changed at
the intervals specified in the mainte-
nance schedule. Do not disconnect and inspect
spark plugs when the engine is
hot. You may burn yourself.
WARNING