What is the water leaking from under the car?
2 Answers
Reasons for water dripping under the car: 1. Condensation forming water droplets: If it occurs after using the air conditioning for a while, this is a normal phenomenon. It happens because during air conditioning operation, moisture in the cabin condenses on the evaporator, forming water droplets that are then discharged outside the car through the drain pan and drain pipe; 2. Loss of antifreeze: Check if the antifreeze in the radiator is low. If it is, promptly visit a 4S shop to inspect the cooling system for faults. Water dripping from the muffler and exhaust pipe at the rear of the car is also normal, commonly seen in winter. Gasoline injected into the cylinders mixes with air and, after complete combustion in the combustion chamber, mainly produces carbon dioxide and water. The water, at high temperatures, is discharged into the atmosphere in the form of water vapor.
I just noticed a puddle of water under my car after parking, which happens quite often. It's very common to see water dripping from the chassis after driving in summer, mostly due to air conditioning condensate. The white water stains feel clean to the touch, so it's normal and nothing to worry about. However, once I saw sticky greenish fluid with a slightly sweet smell, and it turned out to be leaking coolant when I took it to the repair shop—ended up replacing an aged hose. In winter, clear water droplets from the exhaust pipe are actually a good sign, indicating efficient engine combustion. As long as it's not red transmission fluid or black engine oil leaking, small puddles near the tires aren't a big deal; brake discs may also seep water after rain or car washes. Of course, the safest approach is to crouch down and check the exact dripping location and color.
