1.Scalding: The engine coolant is typically at a high temperature when the engine is running, making it extremely hot to the touch. Attempting to open the radiator cap or coolant reservoir, which may be under pressure, to add coolant can result in scalding hot steam and liquid噴出, potentially causing severe burns to exposed skin.
2.Pressure Build-up: When the engine is running, the cooling system is pressurized. Opening the coolant reservoir or radiator cap while the engine is running can cause a sudden release of pressure, leading to a potential geyser-like effect. The coolant can噴出with force, potentially spraying onto nearby components or individuals, posing a risk of injury.
3.Trapped Air: Adding coolant while the engine is running can introduce air into the cooling system. Air pockets in the coolant can interfere with the efficient circulation of coolant and disrupt the system's ability to dissipate heat properly, leading to potential overheating issues.
4.Incorrect Coolant Level: Adding coolant while the engine is running may result in an incorrect coolant level reading due to the expansion and contraction of the coolant as the engine temperature changes. Checking and adjusting the coolant level properly requires adding coolant when the engine is cool and allowing the system to stabilize.
5.Incomplete Mixing: When you add coolant to a running engine, it may not mix properly with the existing coolant. This can lead to localized areas of insufficient cooling and potential engine damage due to inadequate heat transfer.
6.Component Damage: Rapid changes in temperature caused by adding cold coolant to a hot engine can put stress on various engine components, such as gaskets and hoses, potentially causing leaks or premature failure.
To ensure safety and proper maintenance, it is best to wait for the engine to cool down completely before checking the coolant level and refilling it if necessary. Follow the recommended guidelines provided in your car's owner's manual or consult with a qualified technician if you have any concerns or uncertainties regarding coolant maintenance or servicing your vehicle's cooling system.
