What Causes the Coolant to Keep Boiling Over?
2 Answers
The reasons for the coolant constantly boiling over are: 1. The radiator stops functioning, causing the water temperature to become too high, the coolant to stop circulating, the thermostat to remain closed, the water pump to fail operating normally, resulting in a blockage in the water circulation pipeline; 2. Insufficient coolant or poor-quality coolant with a low boiling point. When the coolant boils over, pull over to the side, let the engine idle for a while to allow the temperature to gradually decrease, check if the cooling system is functioning properly, and inspect the coolant level. If the boiling over is caused by insufficient coolant, simply replenish it in time after the engine temperature has decreased. If there is no coolant available, a small amount of water can be added instead.
It's quite common for the coolant to keep boiling over. I've encountered this issue several times before. It could be due to insufficient coolant level—if it's leaking, it's more prone to boiling. Another possibility is a faulty water pump or a thermostat stuck in the closed position. A non-functioning fan can also lead to poor heat dissipation. When the engine is running and the heat can't escape, the coolant temperature rises too high, causing it to boil over. I remember once during a summer road trip, the radiator temperature warning light came on. After stopping to check, I found the radiator was clogged with dirt. Cleaning it out helped a lot. It's advisable to regularly check the coolant level and inspect the radiator and hoses for leaks. Don't underestimate this issue—prolonged boiling can damage the engine, so it's best to visit a repair shop promptly. Adding quality coolant during routine maintenance can also reduce the risk.
