2017 KIA OPTIMA PLUG-IN HYBRID Owners Manual

ENGINE OIL
Checking the engine oil level
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1. Be sure the vehicle is on levelground.
2. Start the engine and allow it to reach normal operating tempera‐
ture.
3. Turn the engine off and wait for a few minutes (about 5 minutes) for
the oil to return to the oil pan.
4. Pull the dipstick out, wipe it clean, and re-insert it fully.
WARNING
nRadiator hose
Be very careful not to touch the ra‐diator hose when checking or addingthe engine oil as it may be hotenough to burn you.
5. Pull the dipstick out again andcheck the level. The level should be
between F (Full) and L (Low).
CAUTION
•Do not overfill the engine oil. Itmay damage the engine
•Do not spill engine oil, when addingor changing engine oil. If you dropthe engine oil on the engine room,wipe it off immediately.
•When you wipe the oil level gauge,you should wipe it with a cleancloth. When mixed with debris, itcan cause engine damage.
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If it is near or at L (Low), add enough oil
to bring the level to F (Full). Do notoverfill.Use a funnel to help prevent oil frombeing spilled on engine components.
Use only the specified engine oil. (Refer
to L

WARNING
Used engine oil may cause skin irri‐tation or cancer if left in contactwith the skin for prolonged periodsof time. Used engine oil containschemicals that have caused cancer inlaboratory animals. Always protectyour skin by washing your handsthoroughly with soap and warm wa‐ter as soon as possible after han‐dling used oil.

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Maintenance

COOLANT
The high-pressure cooling system has
a reservoir filled with year round anti‐
freeze 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 be‐ fore traveling to a colder climate.
CAUTION
•When the engine overheats fromlow engine coolant, suddenly add‐ing engine coolant may causecracks in the engine. To preventdamage, add engine coolant slowlyin small quantities.
•Do not drive with no engine cool‐ant. It may cause water pump fail‐ure and engine seizure, etc.
Checking the coolant level
WARNING
nRemoving radiator cap
•Never attempt to remove the radi‐ator cap while the engine is oper‐ating or hot. Doing so might leadto cooling system and engine dam‐age. Also, hot coolant or steamcould cause serious personal in‐jury.
•Turn the engine off and wait untilit cools down. Use extreme carewhen removing the radiator cap.Wrap a thick towel around it, andturn it counterclockwise slowly tothe first stop. Step back while thepressure is released from the cool‐ing system.When you are sure all the pressurehas been released, press down onthe cap, using a thick towel, andcontinue turning counterclockwiseto remove it.
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•Even if the engine is not operating,do not remove the radiator cap orthe drain plug while the engine andradiator are hot. Hot coolant andsteam may still blow out underpressure, causing serious injury.
The engine coolant and/or inverter
coolant level is influenced by the hybrid system temperature. Before checking
or refilling the engine coolant and/or in‐
verter coolant, turn the hybrid vehicle off.
WARNING
The electric motor (cool‐ing fan) is controlled byengine coolant tempera‐ture, refrigerant pressureand vehicle speed. It maysometimes operate evenwhen the engine is notrunning.
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Maintenance
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Use extreme caution when workingnear the blades of the cooling fan sothat you are not injured by a rotat‐ing fan blades. As the engine coolanttemperature decreases, the electricmotor will automatically shut off.This is a normal condition.If your vehicle is equipped with GDI,the electric motor (cooling fan) mayoperate until you disconnect thenegative battery cable.
Engine coolant
0+'
Check the condition and connections of
all cooling system hoses and heater ho‐ ses. Replace any swollen or deteriora‐
ted hoses.
The coolant level should be filled be‐
tween F (Full) and L (Low) marks on the side of the coolant reservoir when the
engine is cool.
If the coolant level is low, add enough
specified coolant to provide protection against freezing and corrosion. Bring
the level to F (Full), but do not overfill.
If frequent additions are required, we
recommend that the system be inspec‐
ted by an authorized Kia dealer.
Inverter coolant
Check the condition and connections of
all cooling system hoses. Replace any swollen or deteriorated hoses.
The coolant level should be filled be‐
tween MAX and MIN marks on the side
of the coolant reservoir when the en‐ gine is cool.
If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion. Bring the level to MAX, but do not overfill. If
frequent additions are required, we rec‐
ommend that the system be inspected
by an authorized Kia dealer.

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Maintenance

Recommended coolant
• When adding coolant, use only deion‐ized water or soft water for your ve‐hicle and never mix hard water in the
coolant filled at the factory. An im‐
proper coolant mixture can result in
serious malfunction or engine dam‐
age.
• The engine in your vehicle has alumi‐ num engine parts and must be pro‐
tected 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 speci‐fied coolant.
• Do not use a solution that contains more than 60% antifreeze or less
than 35% antifreeze, which would re‐
duce the effectiveness of the solu‐ tion.
For mixture percentage, refer to the
following table.
AmbientTempera‐ture
Mixture Percentage (vol‐ume)
AntifreezeWater
-15°C (5°F) 35 65
AmbientTempera‐ture
Mixture Percentage (vol‐ume)
AntifreezeWater
-25°C
(-13°F) 40 60
-35°C
(-31°F) 50 50
-45°C
(-49°F) 60 40
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Maintenance

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WARNING
nRadiator cap
Do not remove the radiator capwhen the engine and radiator arehot. Scalding hot coolant and steammay blow out under pressure caus‐ing serious injury.
Changing the coolant
We recommend that the coolant be re‐
placed by an authorized Kia dealer.
CAUTION
Put a thick cloth around the radiatorcap before refilling the coolant in or‐der to prevent the coolant fromoverflowing into engine parts suchas the alternator.
WARNING
nCoolant
•Do not use radiator coolant or an‐tifreeze in the washer fluid reser‐voir.
•Radiator coolant can severely ob‐scure visibility when sprayed onthe windshield and may cause lossof vehicle control or damage thepaint and body trim.

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Maintenance

BRAKE FLUID (IF EQUIPPED)
Checking the brake fluid level
Check the fluid level in the reservoir pe‐
riodically. The fluid level should be be‐ tween MAX and MIN marks on the side
of the reservoir.
Before removing the reservoir cap and
adding brake fluid, clean the area around the reservoir cap thoroughly to
prevent brake fluid contamination.
If the level is low, add fluid to the MAX
level. The level will fall with accumula‐ ted mileage. This is a normal condition
associated with the wear of the brake
linings. If the fluid level is excessively low, we
recommend that the system be
checked by an authorized Kia dealer.
Use only the specified brake fluid (Re‐
fer to L

WASHER FLUID
Checking the washer fluid level
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The reservoir is translucent so that you
can check the level with a quick visual
inspection.
Check the fluid level in the washer fluid
reservoir and add fluid if necessary.
Plain water may be used if washer fluid is not available. However, use washer
solvent with antifreeze characteristics
in cold climates to prevent freezing.
WARNING
nCoolant
•Do not use radiator coolant or an‐tifreeze in the washer fluid reser‐voir.
•Radiator coolant can severely ob‐scure visibility when sprayed onthe windshield and may cause lossof vehicle control or damage topaint and body trim.
•Windshield washer fluid agentscontain some amounts of alcoholand can be flammable under cer‐tain circumstances. Do not allowsparks or flame to contact thewasher fluid or the washer fluidreservoir. Damage to the vehicle oroccupants could occur.
•Windshield washer fluid is poison‐ous to humans and animals. Donot drink and avoid contactingwindshield washer fluid. Seriousinjury or death could occur.

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Maintenance