KIA Optima Hybrid 2013 - Manual (Page 320)

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Maintenance
Changing the coolant
Have engine and inverter coolant
changed by an authorized Kia dealer
according to the Maintenance Schedule
at the beginning of this section.
WARNING - Coolant
• Do not use radiator coolant or
antifreeze in the washer fluid
reservoir.
• Radiator coolant can severely
obscure visibility when sprayed
on the windshield and may cause
loss of vehicle control or damage
to paint and body trim.
CAUTION
Put a thick cloth or fabric around
the radiator cap and/or inverter
coolant cap before refilling the
coolant in order to prevent the
coolant from overflowing into
engine parts such as the generator.
WARNING
Radiator cap &
Inverter coolant cap
Do not remove the radiator cap
and/or inverter coolant cap when
the engine and radiator are hot.
Scalding hot coolant and steam
may blow out under pressure caus-
ing serious injury.