How do you flush oil from the radiator?

To flush oil from a radiator, first ensure the engine is cool and drain the coolant by opening the radiator drain valve. Next, fill the radiator with a mixture of water and a radiator flush solution, running the engine for about 10-15 minutes to circulate the mixture. Afterward, drain the solution completely and rinse the radiator with clean water until it runs clear. Finally, refill the radiator with fresh coolant.