ENGINE COOLANT REPLACEMENT <4B1, 6B3>

1. 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 anti-clockwise a little to let the pressure escape through the vinyl tube. After relieving the steam pressure, remove the cap by slowly turning it anti-clockwise.
Drain the water from the radiator, heater core and engine after unplugging the radiator drain plug and removing the radiator cap.
2.Disconnect the cooling water line hose and drain the coolant in the water jacket <4B1>.
https://www.out-club.ru/board/attach...1&d=1334638767
3.Disconnect the water feed hose B and drain the coolant in the water jacket. <6B3>
https://www.out-club.ru/board/attach...1&d=1334638767
4.Remove the radiator condenser tank and drain the coolant.
5.Drain the coolant then clean the path of the coolant by injecting water into the radiator from the radiator cap area.
https://www.out-club.ru/board/attach...1&d=1334638767
6.Connect the cooling water line hose. <4B1>
7.Connect the water feed hose B. <6B3>
8.Securely tighten the radiator drain plug.
9.Reinstall the radiator condenser tank.
10. 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.
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 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).

• Recommended antifreeze: DIA QUEEN SUPER LONG LIFE COOLANT or equivalent
  Quantity:
  • 7.5 L <4B1>
    9.5 L <6B3>
  (including 0.65 L in the radiator condenser tank)
  

note
For how to use special tool (MB991871), refer to its manufacturer’s instructions.

11.Tighten the radiator cap securely.
12.Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.
13.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.

14.Rev the engine several times and then stop it. Check that there are no coolant leaks.
15.Remove the radiator cap with the engine cool, and then refill the engine coolant up to the top of the radiator port.
16.Tighten the radiator cap securely.
17. caution
Do not overfill the radiator condenser tank.

Remove the radiator condenser tank cap, and add the engine coolant up to the "FULL" line.

https://www.out-club.ru/board/attach...1&d=1334639671
https://www.out-club.ru/board/attach...1&d=1334639671