7-12 Vehicle care and maintenance
7
To add coolantUse Mitsubishi Genuine Coolant or an equivalent.
Mitsubishi Genuine Coolant provides excellent protection
against corrosion and rust formation on all metals, including
aluminum, and prevents clogs in the radiator, heater, cylinder
head, engine block, etc.
If you need to add coolant often, or if the level in the reserve
tank does not drop when the engine cools, the cooling system
should be pressure-tested for leaks. Take your vehicle to an
authorized Mitsubishi Motors dealer or a repair facility of your
choice for testing.
Radiator capThe radiator cap must be tight sealed to prevent losing coolant,
which may result in engine damage. Only use a Genuine Mit-
subishi Parts radiator cap, or an approved equivalent.Points to remember
Do not overfill the reserve tank.
Your vehicle uses a special radiator cap that stays sealed
and lets the coolant flow from the reserve tank back to the
radiator when the engine cools down. If you need to
change the cap, use the exact same kind.
Check the coolant freeze point in the radiator with the
proper gauge, and only when it is safe. If you add anti-
freeze, the contents of the reserve tank must be protected
against freezing.
Keep the front of the radiator and condenser clean.
CAUTION
!
Do not use alcohol or methanol antifreeze or any
engine coolants that contain them. Using the wrong
antifreeze can corrode aluminum parts.
When you need to add coolant to the reserve tank,
use at least a 50 % concentration of ethylene-glycol
antifreeze in water. Do not overfill. Use a higher con-
centration (not over 60 %) when the outside temper-
ature is -31 °F (-35 °C) or lower. When the engine is
working very hard (for example, during mountain
driving and/or when the outside temperature is
high), use a 50 % concentration. You can check the
concentration level with a gauge from an automotive
supply store, or your authorized Mitsubishi Motors
dealer or service station can check it for you. Use
only high quality ethylene-glycol antifreeze coolant
that is made to prevent corrosion of all cooling sys-
tem metals.
Do not top off the tank with plain water only. Water
by itself boils at a lower temperature 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.WA R N I N G
!
Wait for the engine to cool down before opening the
radiator cap. Otherwise hot steam or boiling coolant
could spray up from the radiator and scald you.CAUTION
!
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Specifications
9-9
9 Engine specifications
N01147700396
Item
2.4 liter
3.0 liter
Engine model 4B12 6B31Engine displacement 144.0 CID (2,360 cm³) 182.9 CID (2,998 cm³)No. of cylinders and cylinder arrangement 4 in line 6-V60°Bore 3.46 in (88.0 mm) 3.45 in (87.6 mm)Stroke 3.82 in (97.0 mm) 3.26 in (82.9 mm)Compression ratio 10.5Thermostat valve opening temperature 179.6 °F (82.0 °C)Spark plugs
NGK FR5EI ILKR7B8DENSO K16PSR-B8 SXU22HDR8
Spark plug gap .028 to .031 in (0.7 to 0.8 mm)Firing order 1-3-4-2 1-2-3-4-5-6Ignition timing, idle speed, mixture Refer to the “Vehicle emission control information” label under the engine hood
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