What Are the Consequences of Overfilling Coolant?
2 Answers
The consequences of overfilling coolant are: After the coolant expands, the pressure increases, causing the coolant to overflow. The following are the functions of coolant: 1. Provide freeze protection for the engine against low-temperature environments. 2. Prevent the cooling liquid from freezing and cracking the radiator or damaging the engine cylinder block and cylinder head when the vehicle is parked in winter. 3. Provide cooling functionality. The following are precautions for using coolant: 1. Try to use the same brand of coolant. 2. When adding coolant, ensure the product is within its validity period. 3. Avoid diluting it with water. 4. If a large amount of particle precipitation appears, it indicates the coolant has deteriorated and should no longer be used.
I once accidentally overfilled the coolant while driving, and the consequences were quite troublesome. First, the cooling system overflowed, causing the coolant to leak onto the ground through the overflow tube, which was not only wasteful but also environmentally harmful. Over time, the increased internal pressure in the system can easily damage the radiator cap or seals, leading to insufficient coolant. When the engine heats up, the water temperature warning light comes on. That time on the highway, the water temperature soared, nearly causing engine damage, and the repair cost me over a thousand dollars. Excessive pressure can also corrode pipes and radiators, accelerating wear and tear. The mechanic said such issues are common but often overlooked. So now, before adding coolant, I always check the MIN and MAX lines on the reservoir and use a funnel to pour it slowly, avoiding overfilling. Regular checks, like glancing at the fluid level during oil changes, have become a habit to prevent such hassles.
