spark plugs replace GENESIS G90 2023 Owners Manual

6-73
06
Winter Precautions
Use high quality ethylene glycol coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 9. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Check battery and cables
Winter temperatures affect battery
performance. Inspect the battery and
cables, as specified in chapter 9. The
battery charging level can be checked by
an authorized retailer of Genesis Branded
products or in a service station.
Change to “winter weight” oil if
necessary
In some regions during winter, it is
recommended to use the “winter
weight” oil with lower viscosity. In
addition, replace the engine oil and filter
if it is close to the next maintenance
interval. Fresh engine oil ensures
optimum engine operation during the
winter months. For further information,
refer to chapter 2. When you are not sure
about a type of winter weight oil, consult
an authorized retailer of Genesis Branded
products.Check spark plugs and ignition system
Inspect the spark plugs, as specified in
chapter 9. If necessary, replace them.
Also check all ignition wirings and
components for any cracks, wear-out,
and damage.
To prevent locks from freezing
To prevent the locks from being frozen,
spray approved de-icing fluid or glycerin
into key holes. When a lock opening is
already covered with ice, spray approved
de-icing fluid over the ice to remove it.
When an internal part of a lock freezes,
try to thaw it with a heated key. Carefully
use the heated key to avoid an injury.
Use approved window washer anti-
freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as specified
on the window washer container.
Window washer anti-freeze solution is
available from an authorized retailer of
Genesis Branded products, and most
vehicle accessory outlets. Do not use
engine coolant or other types of anti-
freeze solution, to prevent any damage
to the vehicle paint.
Do not let your parking brake freeze
Under some conditions your parking
brake can freeze in the engaged position.
This is most likely to happen when there
is an accumulation of snow or ice around
or near the rear brakes or if the brakes
are wet. When there is the risk that your
parking brake may freeze, temporarily
apply it with the gear in P (Park). Also,
block the rear wheels in advance, so the
vehicle may not roll. Then, release the
parking brake.

9-8
Maintenance
Normal Maintenance Schedule
MAINTENANCE
INTERVALS
MAINTENANCE
ITEMNumber of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144 156
Miles×1,000 8 16 24 32 40 48 56 64 72 80 88 96 104
Km×1,000 13 26 39 52 65 78 91 104 117 130 143 156 169
Engine oil and engine oil filter
*1
RRRRRRRRRRRRR
Fuel additives
*2
Add every 8,000 miles (13,000 km) or 12 months
Air cleaner filterInspect every 8,000 miles (13,000 km) or 12 months,
replace every 24,000 miles (39,000 km) or 36 months
Spark plugsRR
Rotate tires Rotate tires every 8,000 miles (13,000 km) or 12 months
Cabin air filter
(for evaporator and blower unit)RRRRRR
Drive belts
*3
At first, inspect at 48,000 miles (78,000 km) or 72 months,
after that, inspect every 8,000 miles (13,000 km) or 12 months
MHEV (Mild Hybrid Vehicle) belt *
3 (if equipped)Inspect every 6,000 miles (10,000 km) or 12 months
Replace every 60,000 miles (100,000 km) or 48 months
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.*1 :
Requires grade engine oil. If a lower grade engine oil (mineral oil including Semi-
synthetic) is used, then the engine oil and engine oil filter must be replaced as indicated severe maintenance condition.
*2 :
If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your
authorized retailer of Genesis Branded products along with information on how to use them. Do not mix other additives.
*3 :
The drive belt should be replaced when cracks occur or tension is reduced.

9-11
09
Maintenance Under Severe Usage Conditions
The following items must be serviced more frequently on cars 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 filter*1RReplace every 5,000 miles
(8,000 km) or 6 monthsD, H, I, L
MHEV (Mild Hybrid Vehicle)
belt (if equipped)IInspect every 3,000 miles
(5,000 km) or 6 months
B, C, D,
E, I, K
RReplace every 30,000 miles
(50,000 km) or 24 months
Air cleaner filter IInspect more frequently
depending on the conditionC, E
Spark plugs RReplace more frequently
depending on the conditionA, B, F, G,
H, I, K
Steering gear rack, linkage and
bootsIInspect more frequently
depending on the conditionC, D, E,
F, G
Front suspension ball joints IInspect more frequently
depending on the conditionC, D, E,
F, G
Disc brakes and pads, calipers
and rotorsIInspect more frequently
depending on the conditionC, D, E, G,
H, J, K
Parking brake IInspect more frequently
depending on the conditionC, D, G, H
Drive Shaft IInspect more frequently
depending on the conditionC, D, E, F,
G, H, I, J
Cabin air filter RReplace more frequently
depending on the conditionC, E, G
Automatic transmission fluid RReplace every 60,000 miles
(100,000 km)A, C, F, G,
H, I, J, K
Front differential oil (AWD) /
Rear differential oilRReplace every 72,000 miles
(120,000 km)C, D, E, G,
H, I, J
Propeller shaft IInspect more frequently
depending on the conditionC, D, E, F,
G, H, I, J
Transfer case oil (AWD) No check, No service required
*1 : Requires grade engine oil. If a lower grade
engine oil (mineral oil including Semi-synthetic) is used, then the engine oil and engine
oil filter must be replaced as indicated severe maintenance condition.

9-13
09
Engine Oil and Filter
The engine oil and filter should be
changed at the intervals specified in the
maintenance schedule. If the vehicle
is being driven in severe conditions,
more frequent oil and filter changes are
required.
Drive Belts
Inspect all drive belts for evidence
of cuts, cracks, excessive wear or oil
saturation and replace if necessary.
Drive belts should be checked
periodically for proper tension and
adjusted as necessary.
Information
When you are inspecting the belt, turn the
engine off.
Fuel Lines, Fuel Hoses and
Connections
Check the fuel lines, fuel hoses and
connections for leakage and damage.
Have an authorized retailer of Genesis
Branded products replace any damaged
or leaking parts immediately.
Fuel Filter
The fuel filter is considered to be
maintenance free but periodic inspection
is recommended for this maintenance
depends on fuel quality. If there are
some important matters like fuel flow
restriction, surging, loss of power, hard
starting problem etc., replace the fuel
filter immediately. Have you consult an
authorized retailer of Genesis Branded
products for details.
Vapor Hose and Fuel Filler Cap
The vapor hose and fuel filler cap should
be inspected at those intervals specified
in the maintenance schedule. Make sure
a new vapor hose or fuel filler cap is
correctly replaced.
Air Cleaner Filter
We recommend that the air cleaner filter
be replaced by an authorized retailer of
Genesis Branded products.
Spark Plugs
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.
Cooling System
Check cooling system components, such
as radiator, coolant reservoir, hoses and
connections for leakage and damage.
Replace any damaged parts.
EXPLANATION OF SCHEDULED MAINTENANCE ITEMS