The main difficulty of replacing the antifreeze with Hyundai Accent is that there is no cork in the tank. Antifreeze can only be merged through the radiator.
So, from the radiator, you need to drain the old liquid (this is about 2 to 2.5 liters). The heat/cold adjustment knob shall be at the maximum temperature position. After that, the heat sink must be filled with clean water.
Now we need to start the engine, run the water on the system, then turn off the engine and drain the water.
The procedure will have to be repeated until the water is completely clean. After that, two more times to fill and drain the water, but distilled.
Then the cork cork and the heat sink is filled with approximately three liters of concentrated antifreeze.
