What Causes Water to Overflow from the Radiator Cap?

[MaliaAnn]

The reasons for water overflowing from the radiator cap are: 1. The engine is overheated, high pressure can cause water to overflow, or the cylinder head gasket is damaged, leading to water overflow; 2. The radiator cap is damaged. There is a one-way valve inside the radiator cap, and if it fails, water will overflow; 3. There is air trapped in the radiator or engine that is difficult to expel, and the hose seal is not tight, allowing air to enter and causing the coolant to be squeezed out of the radiator during circulation by the air; 4. Too much water was added. The function of the car radiator: to absorb heat from the cylinder block and prevent engine overheating and malfunctions. Precautions for using a car radiator: 1. Prevent the car radiator from overheating; 2. Regularly replace the coolant; 3. Do not use tap water as a substitute for coolant; 4. Choose high-quality diluted water or antifreeze when selecting radiator water or antifreeze; 5. Perform regular anti-rust treatment on the radiator; 6. Address radiator malfunctions promptly to avoid causing other faults with continued use.