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Make sure the coolant cap is properly 
closed after refilling coolant. Otherwise 
the engine could be overheated while 
driving.
1. Check if the coolant cap label is straight 
in front.
Engine compartment front view
OOSH089010L
Liquid-cooled intercooler coolant front view
OIK093138
2. Make sure that the tiny protrusions 
inside the coolant cap are securely 
interlocked.
Engine compartment
OIK093144
Liquid-cooled intercooler coolant
2C_CheckCoolantCapLocked_2
 
Recommended coolant
• When adding coolant, use only 
deionized water, distilled water or soft 
water for your vehicle and never mix 
hard water in the coolant filled at the 
factory.
• An incorrect coolant mixture can result 
in severe malfunction or engine 
damage.
• The engine in your vehicle has 
aluminum engine parts and must be 
protected by an phosphate-based 
ethylene glycol coolant to prevent 
corrosion and freezing.
• Do not use alcohol or methanol coolant 
or mix them with the specified coolant.
• Do not use a solution that contains 
more than 60 % antifreeze or less than 
35 % antifreeze, which would reduce 
the effectiveness of the solution.
For mixing percentage, refer to the 
following table:
Ambient 
Temperature
Mixture Percentage 
(volume)
Antifreeze Water
5 °F (-15 °C) 35 65
-13 °F (-25 °C) 40 60
-31 °F (-35 °C) 50 50
-49 °F (-45 °C) 60 40
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