What Causes Water Dripping Under the Car Chassis?

[StBentley]

Reasons for water dripping under the car chassis: 1. Exhaust pipe dripping: When the combustible mixture enters the engine cylinder for combustion, the discharged water vapor condenses into liquid water after passing through the three-way catalytic converter, muffler, and exhaust pipe. Under the airflow generated by the engine's high-speed operation, the liquid water is expelled from the exhaust pipe along with the exhaust gases. 2. Body drainage hole dripping: The door drainage holes are hidden under the door seal strips at the bottom of the door panel, primarily responsible for draining rainwater that seeps into the door interior through gaps in the windows and doors. 3. Air conditioning drain pipe dripping: During summer, the air conditioning is used frequently. When the air conditioning operates, condensation forms inside the evaporator box of the air conditioning system. Normally, this condensation is drained outside the vehicle through a dedicated drain pipe. If the drain pipe is clogged or bent, the water cannot flow out and may leak onto the floor mats inside the car.