50 Cooling System 3 Use a reputable cleaner to clean the cooling system. Follow the recommendations that come with the cleaner. 4 Drain the cleaner and flush the cooling system with clean water. 5 Fill the cooling system with clean water and operate the engine until the coolant temperature has reached 120 to 150 F (50 to 65 C). 6 Drain the water and flush the cooling system with clean water. 7 Again, fill the cooling system with clean water and operate the engine until the coolant temperature has reached 120 to 150 F (50 to 65 C). 8 Drain the water and flush the cooling system with clean water. 9 Fill the cooling system with pre-mixed Extended Life Coolant.
Check the specifications section for refill quantity. 10 Attach label to the coolant surge tank to indicate that the system is now filled with Extended Life Coolant . The label can be ordered from your Volvo Truck dealer spare parts department. W2004463 Note: When changing over from standard to extended life antifreeze, tighten all hose clamps and fasteners in the cooling system. Extended life coolant tends to leach out deposited silicate and leaks may appear.