ENGINE COOLANT REPLACEMENT <4B1, 4J1>


caution Note that the following service procedures are not applicable for vehicles with electric heater (option for 4B1-PHEV).
warning When removing the radiator cap, use care to avoid contact with hot engine coolant or steam. Place a shop towel over the radiator cap and turn the radiator cap anti-clockwise a little to let the pressure escape through the vinyl tube. After relieving the steam pressure, remove the radiator cap by slowly turning it anti-clockwise.

<4B1-Except PHEV, 4B1-PHEV (Vehicles without electric heater)>


1.Remove the engine room under cover front (Refer to GROUP 51 - Under Cover - Removal and Installation ).
2.Drain the water from the radiator, heater core and engine after unplugging the radiator drain plug and removing the radiator cap.

3.Drain the water in the water jacket by unplugging the drain plug of the cylinder block.
4.Remove the radiator condenser tank and drain the coolant.

5.Replace the cylinder block drain plug gasket, and tighten the drain plug to the specified torque.
Tightening torque: 39 ± 3 N·m
6.Securely tighten the radiator drain plug.
7.Reinstall the radiator condenser tank.

8.
caution Do not use alcohol or methanol anti-freeze or any engine coolants mixed with alcohol or methanol anti-freeze. The use of an improper anti-freeze can cause corrosion of the aluminium components.
Use special tool LLC changer (MB991871) to refill the engine coolant up to the top of the radiator port.

    Recommended antifreeze: MITSUBISHI MOTORS GENUINE SUPER LONG LIFE COOLANT PREMIUM or equivalent*
    note *similar high quality ethylene glycol based non-silicate, non-amine, non-nitrate and non-borate coolant with long life hybrid organic acid technology.
    Quantity: Approximately 8.0 L <4B1-Except PHEV, 4J1> or 7.0L <4B1- PHEV(Vehicles without electric heater)>
note For how to use special tool (MB991871), refer to its manufacturer's instructions.
9.Tighten the radiator cap securely.
10.Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
11.Turn the A/C switch to OFF position to start the engine and warm up until the cooling fan operates.
note This work is to open the thermostat fully.
12.Rev the engine several times and then stop it. Check that there are no coolant leaks.
13.Remove the radiator cap with the engine cool, and then refill the engine coolant up to the top of the radiator port.
14.Tighten the radiator cap securely.
15.
caution Do not overfill the radiator condenser tank.
Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
16.Install the engine room under cover front (Refer to GROUP 51 - Under Cover - Removal and Installation ).

<4B1-PHEV (Vehicles with electric heater)>


1.Remove the engine room under cover front (Refer to GROUP 51 - Under Cover - Removal and Installation ).

2.Remove the electric heater drain plug and the radiator cap in that order. Then drain the engine coolant from the radiator, the heater core and the electric heater.

3.Drain the water in the water jacket by unplugging the drain plug of the cylinder block.
4.Remove the radiator condenser tank and drain the coolant.

5.Replace the cylinder block drain plug gasket, and tighten the drain plug to the specified torque.
Tightening torque: 39 ± 3 N·m
6.Securely tighten the radiator drain plug.
7.Reinstall the radiator condenser tank.

8.Tighten the electric heater drain plug.
note A new washer ring must be used.

9.Use special tool LLC changer (MB991871) to refill the engine coolant up to the top of the radiator port.

    Recommended antifreeze: MITSUBISHI MOTORS GENUINE SUPER LONG LIFE COOLANT PREMIUM or equivalent*
    note *similar high quality ethylene glycol based non-silicate, non-amine, non-nitrate and non-borate coolant with long life hybrid organic acid technology.
    Quantity: Approximately 9.0 L
10.Remove the bolt from the ventilation hole on heater pipe A (Refer to GROUP 55 - Heater Hose ). Then air-bleed the system.
11.Tighten the bolt into the ventilation hole.
12.Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
13.Tighten the radiator condenser cap securely.
14.Turn off the air-conditioner switch, and then warm the engine until the cooling fan runs.
note This work is to open the thermostat fully.
15.Rev the engine several times and then stop it. Check that there are no coolant leaks.
16.Remove the radiator cap with the engine cool, and then refill the engine coolant up to the top of the radiator port.
17.Tighten the radiator cap securely.
18.Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
19.Tighten the radiator condenser cap securely.
20.Install the engine room under cover front (Refer to GROUP 51 - Under Cover - Removal and Installation ).