What Causes Water Leakage Under a Sedan?
2 Answers
There are three main reasons for water leakage under the car: condensation water dripping from the air conditioner in use; a fault in the radiator cooling system causing water leakage under the car; and windshield washer fluid dripping. Below are the methods to check and eliminate water leakage under the car: 1. Check the radiator: First, check if the radiator coolant is missing, inspect the cooling system pipes for looseness or damage, and check the bottom of the radiator for any scratches from grounding; ensure the coolant reservoir is not overfilled (overflow may occur when the temperature rises). 2. Check the water reservoir: Inspect the windshield washer fluid reservoir and its pipes and connections for looseness or damage. 3. Check for condensation dripping: Determine if the dripping is caused by prolonged use of the air conditioner on hot days, leading to condensation water discharge.
I've been driving for twenty years and have seen quite a few cases of water leakage under cars. The most common is air conditioning condensate water – it's completely normal to see clear water dripping under the passenger seat after using the AC in summer. However, you should be cautious if you notice colored liquids leaking, such as green or pink coolant, which indicates a problem with the cooling system. If left unrepaired, the engine could seize at any moment. Additionally, a cracked windshield washer fluid tank will leak blue water that smells like dish soap; a leaking fuel tank has a strong gasoline odor and may show some oily reflection. The most annoying issue is when the door drain holes get clogged, causing rainwater to accumulate inside the door panel and slowly seep out, leading to mold growth everywhere. In such cases, it's crucial to clean the drain holes immediately.
