Warning: Do not open the radiator cap when the engine is hot. In a hot engine, the coolant is under pressure, so when the radiator cap is opened, it can be released. Failure to do so may result in serious burns. Open the cap only after the radiator tank has cooled down so that it can be touched by hand.
Coolant used
Use a quality liquid that is a mixture of ethylene glycol and water in a ratio of 50% to 50%. The coolant must not be aggressive towards aluminum parts. Do not add additional corrosion inhibitors or additives to the fluid. To prevent engine corrosion and fluid freezing, use the correct grade of antifreeze at the specified concentration. The content of antifreeze in the liquid must not be higher than 60% and not lower than 35%, otherwise the cooling system will be damaged. The composition of the liquid for topping up or replacing is indicated in the table below.
Ambient temperature,°С | The composition of the coolant,% | |
Antifreeze | Water | |
-15 | 35 | 65 |
-25 | 40 | 60 |
-35 | 50 | 50 |
-45 | 60 | 40 |
Checking the coolant level
Gas engine | diesel engine |
The fluid level is determined by the marks on the transparent wall of the expansion tank. On a cold engine, the coolant level should be between the marks «L» (Min.) And «F» (Max.) on the tank. If the fluid level is below the mark «L» add fluid to the level between the marks «L» And «F». If the fluid level drops, check the tightness of the cooling system and check the level more often. If the level drops again, have your Hyundai dealer check and determine the cause.
Coolant replacement
The coolant must be replaced at the time specified in section 5.
Caution: Coolant can damage your vehicle's paintwork. If coolant gets on the paintwork, rinse thoroughly with clean water.
1. Install the car on a flat horizontal platform, turn on the parking brake and after the engine has cooled down, remove the radiator cap.
2. Install a drain container. Open the radiator drain cock, drain the liquid into a container, then close the drain cock securely.
3. The capacity of the cooling system is indicated in section 9. Pour the required amount of coolant into the radiator according to the manufacturer's directions on the container.
4. Turn the radiator cap fully counterclockwise without pressing it to release any residual pressure in the cooling system. Remove the radiator cap by pushing it in and turning it counterclockwise. Then fill the radiator with clean demineralized or distilled water. Fill with water in small portions until the liquid level reaches the radiator neck.
5. Start the engine and add water to the radiator up to the neck, then add liquid from the expansion tank so that its level is between the marks «L» And «F».
6. Wrap the caps of the radiator and expansion tank and check the reliability of the closing of the drain valves of the system and the absence of leakage through them.
Warning: The cooling fan turns on and off depending on the coolant temperature and therefore may turn on when the engine is not running. When doing any work near the fan, be careful not to get injured by the running fan. When the coolant temperature drops, the fan automatically turns off - this is normal.