How High Does Water Need to Submerge a Car to Cause Damage?
2 Answers
Generally, water reaching half the height of the wheels can already affect the car. Relevant details are as follows: 1. Water submerging the exhaust pipe: If water only submerges the exhaust pipe, promptly moving the car away is sufficient. Submerging the exhaust pipe does not cause water to be sucked back into the engine, and engine stalling is primarily due to water entering the engine's intake system, unrelated to the exhaust pipe being submerged. 2. Water reaching half the wheel height: If water reaches exactly half the wheel height, the car usually won't leak. However, if submerged for an extended period and the sealing strips have aged, leakage may occur. In such cases, drive the car to a 4S shop, dismantle the interior, clean, and dry it. 3. Water exceeding half the wheel height: If water surpasses half the wheel height, the engine may take in water, and the interior could leak. Never start the engine in this situation to avoid damage to the engine or electronic components. Additionally, insurance companies will not cover damages caused by attempting to start a water-submerged car.
I've driven all kinds of cars for over twenty years and personally experienced several flood-related vehicle incidents. The most memorable one was when water reached the midpoint of the wheels. I thought it wasn't a big deal, but after a few days, the dashboard started malfunctioning. Upon inspection, it was found that the electronic wiring in the chassis had been corroded by water ingress. The height of the water is crucial: generally, if it reaches the lower edge of the door handle, it can enter the cabin, soaking the carpets and leading to mold and odors. When the water reaches near the bumper, the engine's air intake may suck in water, causing internal rust or bending of piston connecting rods. Once the water level surpasses the seats, the vehicle's computer control units and airbags may fail, making repairs more expensive than replacing the car. If you encounter floodwater, don't force your way through; observe the water depth markers on the road, with the wheel midpoint being the warning threshold. Always conduct a thorough inspection afterward to avoid hidden faults.
