What Causes Water Dripping Under the Car?
2 Answers
The main reasons for water dripping under the car are the following three: 1. Condensation water from the air conditioning system during operation; 2. Leakage caused by a malfunction in the radiator cooling system; 3. Windshield washer fluid dripping. Inspection and troubleshooting methods: 1. Check if the radiator coolant is low, then inspect the cooling system pipes for looseness or damage, and check the bottom of the radiator for scratches from grounding; 2. Determine if the coolant reservoir is overfilled; 3. Inspect the windshield washer fluid reservoir and its pipes and connections for looseness or damage; 4. Determine if the dripping is caused by prolonged use of the air conditioning in hot weather, leading to condensation water discharge.
Hey, I've been driving for years and often see water dripping under the car—don't worry too much. The most common scenario is after running the AC in summer and parking by the roadside; that’s just condensate from the air conditioning. During cooling, water vapor from the evaporator condenses and drips down—clear and pure, completely normal and harmless. If water flows from under the engine or chassis, it might be coolant leakage due to poor sealing or pipe damage. Coolant is colored (green, red, or yellow), often in larger quantities and warm, requiring immediate inspection to prevent engine overheating or failure. In winter or during cold starts, water dripping from the exhaust is a normal byproduct of combustion. Occasionally, brake fluid leaks or oil seepage can also cause dripping, but these are sticky and have distinct odors, indicating a more serious issue. Always observe the location and characteristics of drips when parking. If normal, carry on driving; if abnormal, visit a repair shop—safety first!
