Hyundai Ioniq Hybrid 2020 Owner's Manual page 554

WARNING
Make sure the coolant cap is
properly closed after refilling
coolant. Otherwise the engine
could be overheated while driv-
ing.
■ Engine room front view
OTL075062
1. Check if the coolant cap label
is straight In front.
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■ Engine compartment rear view
OAE076050
2. Make sure that the tiny pro-
trusions inside the coolant
cap is securely interlocked.
Recommended coolant
• When adding coolant, use only
distilled (deionized) water for your
vehicle and never mix hard water in
the coolant filled at the factory.
• An improper coolant mixture can
result in severe malfunction or
engine/ hybrid system damage.
• The engine in your vehicle has alu-
minum 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 spec-
ified 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.
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