Why Can't the Car Door Be Opened When It's Flooded?

[LeKai]

Car doors cannot be opened when flooded due to excessive water pressure. The air inside the cabin creates a pressure difference between the inside and outside, causing the water to exert a force of up to 150 kilograms on the door, making it impossible to open. Once the cabin is completely filled with water, the pressure difference balances out, and the door can then be opened as easily as in normal air conditions. The reasons for the steering wheel becoming heavier after wading through water are as follows: 1. During wading, water inevitably enters the car's components. This may cause the hydraulic power steering pump's drive belt to slip when it comes into contact with water, reducing steering assistance and making the wheel heavier. 2. Water entering the electric power steering components after wading may cause circuit malfunctions. 3. Water entering the steering gear during wading can lead to internal mechanical failures. 4. Moisture in the steering gear wiring harness connectors may cause temporary short circuits. 5. Water entering the suspension bushings increases steering resistance. 6. Contamination of the power steering fluid with water reduces its functionality, increasing steering resistance.