Kia 2014 Optima Hybrid Owner's Manual page 391

Maintenance
Checking the coolant level
WARNING
Removing radiator
cap and inverter
coolant cap
• Never attempt to remove the
radiator cap and/or inveter
coolant cap while the engine
is operating or hot. Doing so
might lead to cooling system
and engine damage and could
result in serious personal
injury from escaping hot
coolant or steam.
• The engine coolant and/or
inverter coolant level is influ-
enced by hybrid system tem-
perature. Before filling the
engine coolant and/or inverter
coolant, turn the hybrid vehi-
cle off, fill the engine coolant
and/or inverter coolant care-
fully.
(Continued)
7 28
(Continued)
• Turn the engine off and wait
until it cools down. Use
extreme care when removing
the radiator cap. Wrap a thick
towel around it, and turn it
counterclockwise slowly to
the first stop. Step back while
the pressure is released from
the cooling system. When you
are sure all the pressure has
been released, press down on
the cap, using a thick towel,
and continue turning counter-
clockwise to remove it.
• Even if the engine is not oper-
ating, do not remove the radi-
ator cap and/or inverter or the
drain plug while the engine
and radiator are hot. Hot
coolant and steam may still
blow out under pressure,
causing serious injury.
WARNING
The electronic motor
(cooling fan) is con-
trolled by
coolant temperature,
refrigerant pressure
and vehicle speed. It may some-
times operate even when the
engine is not running. Use
extreme caution when working
near the blades of the cooling
fan so that you are not injured
by the rotating fan blades. As
the engine coolant temperature
decreases, the electric motor
will automatically shut off. This
is a normal condition.
engine