Maintenance 5 Draining off the coolant 1. Switch off the engine and let it cool down. 2. Swivel the radiator cap (arrow) slowly to the side, up to the first fixed stop, and let the pressure escape. Then press down the cover, while proceeding with swivelling. Then, remove the cover. 3. Stretch a tube onto the drain opening (1) of the discharge cock and insert the other tube end into the collecting con tainer. 4. Open the discharge cock and let the coolant run off. 5. Close the discharge cock. Cleaning the cooling system NOTE The cooling system may only be filled slowly since otherwise the included air cannot escape completely. After filling up, wait approx.
3 minutes and refill liquid, if required. 1. Fill up the cooling system slowly with cleaning fluid (Adhere to the specifications of the cleaning agent manufac turer) 1 2. With the radiator cap opened, let the engine run for 5 minutes with a coolant temperature of approx. 80°C. 3. After the cleaning, switch off the engine and open the drain valve (1) to let the entire cooling system run empty. Re-lock the drain valve (1) and slowly fill the cooling system with clean water. 4. Let the engine run for five minutes with a coolant temperature of approx. 80° C. 5. Then, let the cooling system run empty again.
If the extruding water is not clean, the cooling system must be re-flushed until the extruding water is clean. 6. Close the drain valve. WA90-5 – VEAM270100 5-67