Mitsubishi Grandis. Manual — part 811
ON-VEHICLE SERVICE
ENGINE COOLING
14-17
RADIATOR CAP VALVE OPENING
PRESSURE CHECK
M1141001300464
NOTE: Be sure that the cap is clean before
testing. Rust or other foreign material on the cap
seal will cause an improper reading.
1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the indicator of the
gauge stops moving.
Minimum limit: 83 kPa
Standard value: 93
− 123 kPa
3. Replace the radiator cap if the reading does not
remain at or above the limit.
ENGINE COOLANT REPLACEMENT
M1141001200575
WARNING
When removing the radiator cap, use care to
avoid contact with hot coolant or steam.
Place a shop towel over the cap and turn the
cap counterclockwise a little to let the
pressure escape through the vinyl tube.
After relieving the steam pressure, remove
the cap by slowly turning it
counterclockwise.
1. Drain the water from the radiator, heater core and
engine after unplugging the radiator drain plug
and removing the radiator cap.
2. Drain the water in the water jacket by unplugging
the drain plug of the cylinder block.
3. Remove the radiator condenser tank 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 Nut Locking Part
No.4171 or equivalent
Tightening torque: 44
± 5 N⋅m
6. Securely tighten the drain plug of the radiator.
7. Reinstall the radiator condenser tank.
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.
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 LLC changer (MB991871) to refill the
coolant. A convenient mixture is a 50% water and
50% antifreeze solution (freezing point:
−31°C).
Recommended antifreeze: DIA QUEEN SUPER
LONG LIFE COOLANT or equivalent
Quantity:
<Without rear heater> 8.0 L
<With rear heater> 9.5 L
AC211643 AB
Cap adapter
AC302106
Cylinder block
drain plug
AC
AC304677
Cylinder block
drain plug
AE
AC302096
AC
MB991871
Air hose
ON-VEHICLE SERVICE
ENGINE COOLING
14-18
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, then stop the engine.
12.Remove the radiator cap after the engine has
become cold, and pour in coolant up to the brim.
Reinstall the cap.
CAUTION
Do not overfill the radiator condenser tank.
13.Add coolant to the radiator condenser tank
between the "F" and "L" mark if necessary.
CONCENTRATION MEASUREMENT
M1141001100459
Measure the temperature and specific gravity of the
engine coolant to check the antifreeze concentration.
Standard value: 30
− 60% (allowable
concentration range)
Recommended antifreeze: DIAQUEEN SUPER
LONG LIFE COOLANT or equivalent
CAUTION
If the concentration of the anti-freeze is below
30%, the anti-corrosion property will be
adversely affected. In addition, if the
concentration is above 60%, both the
anti-freezing and engine cooling properties will
decrease, affecting the engine adversely. For
these reasons, be sure to maintain the
concentration level within the specified range.
FAN CONTROLLER CHECK
M1141007400102
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
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.
AC302093 AE
2
3
1
Fan controller
AC302093
2
1
AF
Fan controller
ON-VEHICLE SERVICE
ENGINE COOLING
14-19
FAN CONTROL RELAY CONTINUITY
CHECK
M1141006200365
1
3
4
2
3
4
1
2
AC310978
AC303951
Fan control relay
AB
Battery
voltage
Terminal No.to
be connected to
tester
Continuity test
results
Not applied 4
− 2
Open circuit
Connect
terminal
No.1 and
battery (
−)
terminal.
Connect
terminal
No.3 and
battery (+)
terminal.
4
− 2
Less than 2 ohms
THERMOSTAT
ENGINE COOLING
14-20
THERMOSTAT
REMOVAL AND INSTALLATION
M1141002400550
REMOVAL SERVICE POINT
<<A>> RADIATOR LOWER HOSE/HOSE
CLIPS DISCONNECTION
Break off the tip of hose clip claw and spread out the
hose clip, then disconnect the radiator hose.
NOTE: If there is a hose clip claw, the hose clip
cannot spread to capacity because the claw contacts
the hose clip.
Pre-removal and Post-installation Operation
• Engine Coolant Draining and Refilling (Refer to
• Air Cleaner Removal and Installation (Refer to GROUP
15, Air Cleaner
• Battery Removal and Installation
AC302092
1
2
3
3
4
4
5
6
11 ± 1 N·m
11 ± 1 N·m
13 ± 2 N·m
AD
N
Removal steps
<<A>>
>>B<<
1.
Radiator lower hose connection
<<A>>
>>B<<
2.
Hose clips
3.
Engine control harness clamp
4.
Engine control harness clamp
bracket
5.
Water inlet fitting
>>A<<
6.
Thermostat
AC302615
Hose clip
Claw (Tip)
AE
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