What Causes Water Leakage in the Car Body?
2 Answers
Water leakage in the car body may be due to exhaust pipe dripping or air conditioning condensation. Dripping from the muffler and exhaust pipe at the rear of the car is also a normal phenomenon, most commonly occurring in winter. Water drainage from the car's exhaust pipe indicates that the engine is in good working condition, with complete combustion of the air-fuel mixture and high efficiency. You can check if the antifreeze in the radiator filler tank is low. If it is not low, the exhaust pipe drainage is normal, indicating good vehicle condition. In summer, drainage from the air conditioning system is normal. The dripping location of the car's air conditioning system is slightly to the right of the center at the front of the car. If you turn off the engine after driving for a while in summer and wait for some time, you may notice water dripping from the slightly right-central area of the chassis. Since the muffler is located at the rear of the car where the temperature is relatively low, water vapor condenses into liquid water when it cools. Some of this liquid water is discharged through the exhaust pipe, while another portion exits through drainage holes, resulting in the muffler dripping phenomenon.
There are quite a few reasons for water leakage in a car body, with the most common being aging seals. The rubber door seals can harden and crack after several years of use, allowing rainwater to seep in. Additionally, if the sunroof gets clogged and the drainage tubes are blocked, water can backflow into the cabin. Rust on the chassis is another issue, especially in older cars that have traveled on corrosive roads or lacked rustproofing, as holes can lead to leaks. If the evaporator drain tube of the air conditioning system is blocked, condensation water can overflow onto the floor mats. Sometimes, poorly sealed welding points on the roof or improper repairs after an accident can also create opportunities for water ingress. I recommend paying attention to drainage holes during car washes, choosing sheltered parking spots, and regularly checking the condition of seals—these small steps can prevent major issues.