ON-VEHICLE SERVICE
ENGINE COOLING
14-16
6. 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
7. Securely tighten the drain plug of the radiator.
8. Assemble the reserve 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 compo
-
nents.
AC210658
AB
MB991871
Air hose
9. 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: 6.0 L
NOTE: For how to use the special tool, refer to its
manufacturer’s instructions.
10.Reinstall the radiator cap.
11.Start the engine and let it warm up until the
thermostat opens.
12.Repeatedly revving the engine up to 3,000 r/min
several times, then stop the engine.
13.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 reserve tank.
14.Add coolant to the reserve tank between the
"FULL" and "LOW" mark if necessary.
15.Install the under cover (Refer to GROUP 51,
Front Bumper
P.51-2).
CONCENTRATION MEASUREMENT
M1141001100448
Measure the temperature and specific gravity of the
engine coolant to check the antifreeze concentration.
Standard value: 30 − 60 % (allowable concen-
tration range)
Recommended antifreeze: DIA QUEEN 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 speci
-
fied range.
FAN CONTROLLER CHECK
M1141006100238
1. Remove the centre under cover (Refer to GROUP
51, Front Bumper
P.51-2).
AC210945
AB
23 1
Fan controller
connector:
Component
side
Fan controller
2. Disconnect the fan controller connector.
3. Turn the ignition switch to the "ON" position, and
measure the voltage between the harness-side
connector terminals.
Standard value: Battery positive voltage
4. Turn the ignition switch to the "LOCK" (OFF)
position, and connect the fan controller connector.
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