KIA Optima Hybrid 2013 - Manual (Page 317)

Maintenance
24 7
COOLANT
Inverter coolant
The high-pressure cooling system has a
reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the fac-
tory.
Check the antifreeze protection and
coolant level everyday.
If it is near or at MIN, add enough coolant
between MIN and MAX and check the
cooling system for air bleed at an author-
ized Kia dealer.
Engine coolant
The high-pressure cooling system has a
reservoir filled with year-round antifreeze
coolant. The reservoir is filled at the fac-
tory.
Check the antifreeze protection and
coolant level per every day, at the begin-
ning of the winter season, and before
traveling to a colder climate.
Checking the coolant level
OYFH071070N-1
CAUTION
When adding coolant, be careful
not to overfill.
WARNING
Removing radiator
cap and inverter
coolant cap
• Never attempt to remove the radi-
ator cap and/or inverter coolant
cap while the engine is operating
or hot. Doing so might lead to
cooling system and engine dam-
age and could result in serious
personal injury from escaping
hot coolant or steam.
(Continued)
CAUTION
Do not confuse the cap of engine
coolant and inverter coolant. If not,
the coolant circulation problem of
engine or Hybrid system may occur
because the cap pressure is differ-
ent.