Mitsubishi 380. Manual — part 236
ON-VEHICLE SERVICE
ENGINE COOLING
14-28
2. Drain the water in the water jacket by unplugging the drain
plug of the cylinder block.
3. Remove the radiator condenser tank assembly and drain the
coolant.
4. Drain the coolant then clean the path of the coolant by
injecting water into the radiator from the radiator cap area.
5. Apply the designated sealant to the screw area of the
cylinder block drain plug, and then tighten to the standard
torque.
Specified sealant: 3M
™ AAD Part No.8731 or equiva-
lent
Tightening torque:
39
± 5 N⋅m
6. Securely tighten the radiator drain plug.
7. Assemble the radiator condenser tank assembly.
AC306131AB
<3.8L ENGINE: LEFT BANK>
CYLINDER BLOCK
DRAIN PLUG
AC306132AB
<3.8L ENGINE: RIGHT BANK>
CYLINDER BLOCK
DRAIN PLUG
AC200625AD
CYLINDER BLOCK
DRAIN PLUG
<3.8L ENGINE: LEFT BANK>
ON-VEHICLE SERVICE
ENGINE COOLING
14-29
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 aluminum components.
8. By referring to the section on coolant, select an appropriate
concentration for safe operating temperature within the
range of 30 to 60 %. Use special tool MB991871 to refill the
coolant. A convenient mixture is a 50 % water and 50 %
antifreeze solution [freezing point:
−31°C (−32.8 °F)].
Recommended antifreeze: Long Life Antifreeze
Coolant or an equivalent
Quantity:
8.7 Litres
NOTE: For how to use special tool MB991871, refer to its
manufacturer’s instructions.
9. Reinstall the radiator cap.
10.Start the engine and let it warm up until the thermostat
opens.
11.After repeatedly revving the engine up to 3,000 r/min several
times, stop the engine.
12.Remove the radiator cap after the engine has cooled, and
pour in coolant up to the brim. Reinstall the cap.
CAUTION
Do not overfill the radiator condenser tank assembly.
13.Add coolant to the radiator condenser tank assembly
between the "FULL" and "LOW" mark if necessary.
ENGINE COOLANT CONCENTRATION TEST
M1141001100396
Refer to GROUP 00, RECOMMENDED LUBRICANTS AND
LUBRICANT CAPACITIES TABLE 35.
FAN CONTROLLER CHECK
M1141007400113
1. Remove the fan controller connector.
2. Turn the ignition switch to the "ON" position, and measure
the voltage between the harness-side connector terminals.
Standard value: System voltage
AC306129
AIR HOSE
MB991871
AB
04DB017A
2
3
1
Fan controller
ON-VEHICLE SERVICE
ENGINE COOLING
14-30
3. Connect the fan controller connector, and disconnect the
condenser fan motor connector.
4. Ensure that the A/C switch is off, and start the engine and
run it at idle.
5. Measure the voltage between the fan controller-side
connector terminals.
Standard value: 1V or less
WARNING
Stay clear of the fan when the fan starts running.
6. Turn the A/C switch to the "ON" position.
7. Measure the voltage between the fan controller-side
connector terminals while the fan is running. The voltage
should repeat the values below.
Standard value:
8.2
± 2.6 V
System voltage
± 2.6 V
8. If the voltage does not repeatedly change as indicated,
replace the cooling fan motor and fan controller.
04DB018A
2
1
Fan controller
ON-VEHICLE SERVICE
ENGINE COOLING
14-31
FAN CONTROL RELAY CONTINUITY CHECK
M1141006200310
BATTERY
VOLTAGE
TERMINAL NO. TO
BE CONNECTED
TO TESTER
CONTINUITY TEST
RESULTS
Not applied
4
− 2
Open circuit
Connect
terminal No.3
and battery (
−)
terminal.
Connect
terminal No.1
and battery (+)
terminal.
4
− 2
Less than 2 ohms
AC305017
1
3
4
2
3
4
1
2
AC307445
FAN CONTROL RELAY
AB
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