Pic. 1.4. The location of the LOW and FULL marks on the expansion tank
If the coolant level in the expansion tank drops below the LOW mark, open the tank cap and add coolant. If there is no coolant in the expansion tank, also remove the radiator cap and add coolant to it to the level of the filler neck.
Warning. Do not remove the cap from the radiator or expansion tank when the engine is hot, as escaping vapors can cause severe burns. To prevent this, close the radiator cap with a thick piece of cloth and slowly unscrew it until a hissing sound appears. After the hiss stops, unscrew and remove the cap from the radiator.
Antifreeze
The coolant contains ethylene glycol with an anti-corrosion additive. The cylinder head and water pump housing are made of aluminum alloy and the coolant must be replaced periodically to prevent corrosion. Use only genuine MITSUBISHI Genuine Coolant or equivalent. MITSUBISHI Genuine Coolant has excellent anti-corrosion properties, it protects against corrosion and rust formation on all metals, including aluminum, and helps prevent deposits in the engine radiator, heater, cylinder head cooling jacket, cylinder block, etc. The coolant must contain anti-corrosion additives, so it cannot be replaced with plain water even in summer. The required concentration of antifreeze in the coolant depends on the expected air temperature.
Warnings
(1) If the concentration of antifreeze in the coolant is less than 45%, the anti-corrosion properties of the coolant will be significantly reduced. In addition, if the concentration of antifreeze in the coolant is more than 60%, the cooling capacity of the coolant will decrease, which will adversely affect the operation of the engine. For these reasons, make sure that the degree of concentration of antifreeze in the coolant is within the required limits.
(2) Do not use a mixture of different brands of antifreeze.