After normal combustion, cars will produce carbon dioxide and water vapor, which will condense to form liquid water. When the amount of water vapor reaches a certain level, it will be discharged outside the car through the exhaust pipe. When the exhaust pipe of some cars is designed, there will be a drain hole in the exhaust pipe, through which the water can be discharged to the outside of the car. When the owner finds that the water droplets discharged from the exhaust pipe condense into blocks on the ground and the exhaust gas is milky white oil mist, this is abnormal water dripping. The owner needs to check whether the water in the engine cooling water tank is abnormal.

Common leakage parts of automobiles:

Door leakage: Generally, it is caused by the aging of window waterproof strips or the blockage of door drainage holes. Water leakage in the car door will lead to water leakage in the interior trim panel of the car door, which will seriously lead to water accumulation under the carpet in the cockpit. Skylight leakage: Skylight leakage is mostly caused by the blockage of skylight drainage holes. Water leakage from the skylight will cause the roof trim to be damp, and even serious water will "pour" into the carriage from the skylight. Water accumulation in trunk: Water accumulation in trunk is generally caused by poor sealing of trunk sealing strip or taillight sealing strip. Under normal circumstances, if water is found in the position where the spare tire is placed in the trunk, you should be vigilant.