What Causes Water Dripping Under the Car?

1 Answers
LeCourtney
07/24/25 5:42pm
The main reasons for water leakage under the car are the following three: 1. Condensation water: Condensation water produced by the air conditioning system during operation drips down. 2. Cooling system: A malfunction in the radiator cooling system causes water leakage under the car. 3. Windshield washer fluid: Windshield washer fluid drips down. Note 1: Apart from the normal drainage phenomena of internal operating systems such as the air conditioning system, muffler, and exhaust pipe, the car chassis is also equipped with specially designed drainage holes to discharge accumulated water from the vehicle body during rain or snow. These drainage holes include the engine compartment drainage hole, sunroof drainage hole, door drainage hole, and trunk drainage hole. Note 2: The engine compartment drainage hole is generally located on both sides of the front windshield wipers. During rainy days, water accumulated in the sunroof flows through the A-pillar conduit to this area, merges with the water in the engine compartment inside the fender, and is discharged near the wheel mudguard. The sunroof drainage hole is usually located at the four corners of the sunroof on the roof. After rainwater enters the drainage hole, it flows through the conduits inside the A-pillar/C-pillar and is eventually discharged through the drainage outlets near the front and rear mudguards at the bottom of the car.
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