Caution: When draining coolant during repair work, it should be collected for subsequent use, since the coolant contains antifreeze and anticorrosive components. However, if the water pump, radiator or cylinder head is replaced, the coolant must be replaced. Use only coolants approved by MITSUBISHI.
Drain
Set the interior heater control lever to the "Heat" position.
Unscrew the radiator cap.
Caution: For safety reasons, place a rag around the nipple. Unscrew the cap only when the radiator has cooled to a warm state, otherwise you may get scalded.
Place a clean container of suitable capacity under the radiator to collect the liquid.
Turn the wing screw under the radiator and drain the coolant. Drain the coolant from the expansion tank as well.
Replace and tighten the drain screw on the radiator.
Bay
Fill the coolant through the radiator neck to the top edge. Close the radiator.
Fill the expansion tank with coolant up to the "FULL" mark. Close the tank cap.
Start the engine and let it run for about 10 minutes at high idle speed. The engine should reach its operating temperature, and the fan should turn on. During warming up, monitor the fluid level, possibly adding fluid.
After the engine has cooled down, check the coolant level in the expansion tank. If necessary, add coolant until the radiator is completely filled. Then tighten the radiator cap tightly.
Add coolant to the expansion tank up to the "FULL" mark.
Check the cooling system for leaks, especially the hose connections, drain plugs and water pump.