Is it okay to drive through deep water?
2 Answers
It is generally safe for a car to drive through deep water for a short period. However, after wading through water, you shouldn't just drive away. Upon reaching a safe road surface, perform a simple inspection of the vehicle. Since the braking system's performance can be affected after passing through water, the vehicle should continue to drive at a low speed for a distance and lightly press the brake pedal several times to allow friction between the brake pads and discs, evaporating or drying off any water attached to them to restore normal braking ability as quickly as possible. Additional Notes: 1. Observe the depth of the water: During the rainy season, especially in heavy rain, low-lying areas, under overpasses, and tunnels often accumulate water. Avoid driving through large areas of deep water recklessly. 2. Prevent engine stalling: The basic requirement for driving through water is to keep the engine RPM high to avoid stalling and maintain a low speed to minimize water surface disturbance. 3. Do not follow the vehicle in front too closely: When driving through water, maintain a safe distance from the vehicle ahead and increase the lateral distance from oncoming vehicles to prevent water waves from causing high-voltage wire leakage, which could lead to engine stalling.
I've driven through flooded areas a few times, and it's extremely dangerous to drive through deep water. If the water is too deep, exceeding half the height of the wheels, the engine can easily take in water. Once water enters, the engine may stall, and even the piston rods can get bent—this is what's known as 'hydrolock,' and repairs can cost thousands. The electrical system might also short-circuit, leaving the entire car inoperable. Internal parts like brake discs or the exhaust system can rust if soaked for too long, affecting braking performance. I've seen others spend a long time repairing their water-damaged cars, and insurance companies don't always cover the full cost. So, when encountering deep water, it's best to detour or wait until the water recedes. Afterward, be sure to check the chassis and air filter, as high humidity can lead to mold growth and corrode parts. Safety first—don't risk it just to save time.
