Why is water dripping from the car chassis in summer?

[EllianaLee]

There are two possible reasons for water dripping from the car chassis: air conditioning system drainage and water dripping from the muffler and exhaust pipe at the rear of the car. 1. Air conditioning system drainage: Due to the high outdoor temperature in summer and the low temperature inside the car when the air conditioning is on, a temperature difference is created, causing water to drip from the chassis. The low-pressure pipes of the car air conditioning system are not wrapped with insulation foam, making the pipe surfaces prone to condensing moisture from the air. Water droplets will also condense and gather at the lowest point of the pipes, dripping down. 2. Water dripping from the muffler and exhaust pipe at the rear of the car: This generally occurs more frequently in winter. Gasoline is injected into the cylinders and mixed with air, and after full combustion in the combustion chamber, it mainly produces carbon dioxide and water. At high temperatures, the water is discharged into the atmosphere as gaseous water vapor. Since the muffler is located at the rear of the car where the temperature is relatively low, the water vapor will condense into liquid water when it encounters the cold.