How to Add Coolant?
2 Answers
Method for adding coolant: When the coolant reaches normal temperature, first turn off the engine; use a cloth or gloves to cover the reservoir cap to prevent slipping or burns, then slowly rotate and open it to add coolant. Stop adding when the coolant reaches the MAX mark. Start the vehicle and let it run at low speed for 3 to 5 minutes, then open the coolant reservoir. If the coolant level drops, continue adding until it stays between the MAX and MIN marks. Coolant is also known as antifreeze coolant, meaning it has antifreeze properties to prevent the coolant from freezing in cold seasons, which could crack the radiator or damage the engine cylinder block. Antifreeze is not just for winter use—it should be used year-round. In regular car maintenance, the engine coolant should be replaced every year.
Just helped my neighbor top up the coolant a couple of days ago and realized it's actually quite simple but requires attention to detail. First, you must wait for the engine to cool down completely—at least one hour after parking, as opening the cap on a hot engine can lead to steam burns. Locate the translucent coolant reservoir (usually near the edge of the engine bay with MIN/MAX markings), and if the level is below MIN, it needs topping up. Pay special attention to using the same color and type of coolant—I once saw a disaster where mixing different colors caused freezing and a burst radiator. Slowly pour into the overflow tank without exceeding the MAX line, tighten the cap, then start the engine and let it idle for ten minutes to circulate the fluid. Finally, double-check the level for safety. For older cars, it’s a good idea to also check hose connections for any leaks while you’re at it.
