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Mitsubishi Motors Genuine Coolant provides
excellent protection against corrosion and
rust formation on all metals, including alumi-
num, and prevents clogs in some parts of
engine.
If you need to add coolant often, or if the
level in the reservoir does not drop when the
engine and the Plug-in Hybrid EV system
cool, the cooling system should be pressure-
tested for leaks. Take your vehicle to a certi-
fied Mitsubishi EV dealer for testing.
CAUTION
Do not use alcohol or methanol antifreeze or
any engine coolants that contain them. Using
the wrong antifreeze can corrode aluminum
parts.
The required concentration of anti-freeze dif-
fers depending on the expected ambient tem-
perature.
Above -31 °F (-35 °C): 50 % concentration
of anti-freeze
Below -31 °F (-35 °C): 60 % concentration
of anti-freeze
You can check the concentration level with a
gauge from an automotive supply store, or a
certified Mitsubishi EV dealer or service sta-
tion can check it for you.
Do not use water to adjust the concentration
of coolant.
CAUTION
Do not top off the reservoir with plain water
only. Water by itself boils at a lower temper-
ature and does not stop rust or freezing. If the
water freezes, it will damage your cooling
system. Do not use tapwater. It can cause
corrosion and rust.
Radiator cap
The radiator cap must be sealed tight to pre-
vent losing coolant, which may result in
engine damage. Only use a Mitsubishi
Motors Genuine Parts radiator cap, or an
approved equivalent.
Engine coolant/Plug-in Hybrid EV System coolant
WARNING
Wait for the engine and the Plug-in
Hybrid EV system to cool down before
opening the radiator cap (C) and the res-
ervoir cap (D). Otherwise hot steam or
boiling coolant could spray up from the
filler port and scald you.
Points to remember
Do not overfill the reservoir.
Your vehicle uses a special radiator cap
and reservoir cap that stays sealed and lets
the coolant flow from the reservoir back
to the radiator when the engine and the
Plug-in Hybrid EV system cool down. If
you need to change the cap, use the exact
same kind.
Vehicle care and maintenance
9
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