Cooling system Internal: Removing oil and grease Internal: Removing deposits Environment Environment Avoid spillage and use a suitable container. Used coolant must be disposed of as specified in na- tional and international laws and regulations. Avoid spillage and use a suitable container. Used coolant must be disposed of as specified in na- tional and international laws and regulations. 1. Run the engine until it has reached operating temperature and then drain the cooling sys- tem. See the Draining coolant section. 1. Run the engine until it has reached operating temperature and then drain the cooling sys- tem. See the Draining coolant section. 2. Remove the thermostats. 2.
Remove the thermostats. 3. Fill the system with clean, hot water mixed with liquid dishwasher detergent intended for household machines. Concentration 1% (0.1/10 l). 3. Fill the system with clean, hot water mixed with some commercially available radiator detergent which is based on sulphamic acid and contains dispersing agents. Follow the manufacturer's instructions for the concen- tration and cleaning period. 4. Run the engine until it has reached operating temperature for approximately 20-30 min- utes. 4. Run the engine for the specified time. 5. Drain the cooling system. 5. Drain the cooling system. 6. Fill the system with clean, hot water and run the engine for about 20-30 minutes. 6.
Fill the cooling system with clean, hot water and run the engine for about 20-30 minutes. 7. Drain the water from the cooling system. 7. Drain the water from the cooling system. 8. Refit the thermostats. 8. Refit the thermostats. 9. Fill the system with new coolant as described in the section Filling coolant. 9. Fill the system with new coolant as de- scribed in the section Filling coolant. 00:23-03 en-GB 35 © Scania CV AB 2016, Sweden