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ENGINE COOLANT CHANGE


Required Special Tool:
  • MB991871: LLC changer
1.Remove the engine room under cover front A (RH). (Refer to GROUP 51, Under Cover )
2.
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.
Drain the water from the radiator, heater core and engine after unplugging the radiator drain plug and removing the radiator cap.
3.Remove the engine room under cover front B. (Refer to GROUP 51, Under Cover )
4.Remove the air cleaner intake hose. (Refer to GROUP 15, Air Cleaner )
5.Remove the turbocharger compressor bracket. (Refer to GROUP 15, Exhaust Manifold and Turbocharger Assembly )

6.Disconnect the turbocharger water return hose and drain the coolant in the water jacket.
7.Remove the radiator condenser tank and drain the coolant.
8.Drain the coolant then clean the path of the coolant by injecting water into the radiator from the radiator cap area.
9.Connect the turbocharger water return hose.
10.Securely tighten the drain plug of the radiator.
11.Reinstall the radiator condenser tank.

12.
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.
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 engine coolant up to the top of the radiator port. A convenient mixture is a 50% water and 50% antifreeze solution [freezing point: -31°C (-23.8 °F)].

    Recommended antifreeze: Long Life Antifreeze Coolant or an equivalent
    Quantity: 7.5 dm3 (7.9 quarts)
note For how to use special tool (MB991871), refer to its manufacturer’s instructions.
13.Tighten the radiator cap securely.
14.Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
15.Turn the A/C switch to OFF position to start the engine and warm up until the cooling fan operates.
note This step opens the thermostat fully.
16.Rev the engine several times and then stop it. Check that there are no coolant leaks.
17.Remove the radiator cap with the engine cool, and then refill the engine coolant up to the top of the radiator port.
18.Tighten the radiator cap securely.
19.
caution Do not overfill the radiator condenser tank.
Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
20.Install the turbocharger compressor bracket. (Refer to GROUP 15, Exhaust Manifold and Turbocharger Assembly )
21.Install the air cleaner intake hose. (Refer to GROUP 15, Air Cleaner )
22.Remove the engine room under cover front B and engine room under cover front A (RH). (Refer to GROUP 51, Under Cover )