Is it safe for a car to wade through 20cm of water?
3 Answers
It is generally safe for a car to wade through 20 centimeters of water, but depths exceeding 30 centimeters are usually dangerous. If the water depth surpasses 20 centimeters, avoid driving through it. This is especially true for older car models, as their lower air intake and exhaust ports may allow water to be sucked back into the engine through the exhaust pipe, causing the engine to stall. Here are some relevant points: 1. Precautions: When driving through waterlogged roads, use a low gear and proceed slowly. It's crucial to avoid lifting the accelerator pedal ('closing the throttle') while crossing, as this action can create a strong suction effect in the exhaust system, potentially drawing water into the engine. 2. Risks: After wading through water, multiple components may be affected by water ingress, which could impair the car's performance. In severe cases, the vehicle may fail to start normally.
Driving through 20cm of water is really unsafe. I tried it once and ended up with water entering the engine, causing the car to stall immediately. The repair cost me several thousand dollars. A depth exceeding 15cm can allow water to flow into the air intake, leading to engine damage. Modern car engines are generally positioned at a height of 30-40cm, but 20cm is already a critical point, especially for sedans with lower ground clearance. If you must drive through water, remember to maintain a slow and steady speed—avoid accelerating or braking suddenly, as this can cause water to surge back into the exhaust pipe. Afterward, check the air filter and electrical connections to prevent rust. When encountering flooded areas during rain, it's best to detour or stop and observe—never take risks. Safety is far more important than time.
When I first started driving, I didn't understand the danger of water depth and thought 20cm was no big deal. However, I later realized that when the water level approaches the bottom of the car door, it can easily lead to water ingress. According to data, the typical wading depth for sedans is around the center height of the wheels, and exceeding 15cm poses a high risk. Water entering the engine compartment can cause short circuits or engine failure, which is expensive and troublesome to repair. Additionally, driving through water on slippery rainy roads increases the risk of losing control or skidding. It's advisable to check the weather forecast in advance and choose main roads to avoid low-lying areas. If you must drive through water, keep your speed below 10km/h and have the seals and battery wiring inspected at a repair shop afterward to protect your vehicle's lifespan. Always pay attention to your car's condition to avoid regrets later.
