What Causes the Dripping Sound Under the Car Chassis After Stopping?
1 Answers
There are two scenarios for water dripping under the car chassis: drainage from the air conditioning system and water dripping from the muffler or exhaust pipe at the rear of the car. More details about water dripping under the car chassis are as follows: 1. Air Conditioning System Drainage: Air conditioning system drainage occurs due to the temperature difference between the high outdoor temperature in summer and the low temperature inside the car when the air conditioning is on, leading to water dripping under the chassis. The low-pressure pipes of the car's air conditioning system are not wrapped with thermal insulation foam, making the pipe surfaces prone to condensation of moisture from the air. Water droplets also condense and collect at the lowest point of the pipes, dripping down. 2. Water Vapor Condensation Dripping: Water dripping from the muffler or exhaust pipe at the rear of the car is also a normal phenomenon, commonly observed in winter. Gasoline injected into the cylinders mixes with air and, after complete combustion in the combustion chamber, mainly produces carbon dioxide and water. At high temperatures, water is discharged into the atmosphere in the form of gaseous water vapor. Since the muffler is located at the rear of the car where the temperature is relatively lower, the water vapor condenses into liquid water upon cooling.
