How High Does Water Need to Reach to Affect the Engine?

[DelAlex]

Water reaching the engine air intake or above the tire level can affect the engine. Below are the hazards of water entering a car: 1. Damage to electronic components: Cars contain numerous electronic components, and if submerged, it can impact the vehicle's future reliability. Even after replacements, it's difficult to guarantee the car's dependability, and the likelihood of malfunctions increases over time. 2. Odors and bacterial growth: When the interior gets soaked, odors are inevitable. Post-flooding, the usual treatment involves rinsing, drying, and sun exposure, which means hidden areas can easily become breeding grounds for bacteria, leading to unpleasant smells.

[Jonathan]

I've been driving for decades and encountered flooded road conditions several times. If the water level reaches the center of the wheels, approximately 30 cm above the ground, you need to be extremely cautious. In such situations, water can easily overflow the engine's air intake and be sucked into the cylinders. Once inside, the engine may lock the pistons while compressing air, causing hydraulic shock damage, commonly known as hydro-lock. That summer, I saw a car forcing its way through a water puddle where the water level just passed the bumper, resulting in a ruined engine that cost over ten thousand yuan to repair. Remember, never blindly drive through water. If you find the water too deep, pull over and turn off the engine immediately. During regular maintenance, check the air intake position, which varies across different car models. SUVs usually have a higher intake, while sedans are more vulnerable to water damage. Safety always comes first—cars aren't toy boats. If you encounter standing water, take a detour.

[LeJayden]

As a new driver, I was initially always worried about my car getting flooded. When the water level reaches the height of the wheels, it can affect the engine. This is because the engine's air intake is usually located under the hood near the front wheels, and if water surpasses this point, it can be sucked into the cylinders, causing damage to internal components. Once during rainy weather, I saw someone in the community group share that their car took in water when the water level was only halfway up the wheel hubs, and replacing the engine cost several thousand dollars. I suggest that if you encounter such a situation, you should immediately stop and avoid starting the car to prevent further damage. It's important to study your vehicle's manual to understand its wading depth. You can also check the air filter in advance to ensure it stays dry. If water enters the car, the electrical system is also prone to short circuits, so a comprehensive inspection is necessary. Calling a tow truck to take the car to a professional repair shop promptly is the most reliable solution.

[LaAlyssa]

You must stop the car when water levels submerge the wheels or reach bumper height. Engine damage primarily occurs when water enters the intake, causing hydro-lock and internal damage to components like the crankshaft. Immediately turn off the engine if flooded and call for roadside assistance to await towing. I once witnessed a neighbor forcibly crossing about 20cm deep water - the car stalled and required expensive repairs afterward. Electrical system failures can further complicate repairs. Always check weather forecasts and avoid flooded roads for safety. Never restart a waterlogged vehicle as it may worsen damage. Towing to a workshop for thorough inspection is the wisest course.

[ArabellaDella]

Be cautious if water reaches around knee height. Water entering through the intake can compress in the cylinders, impacting pistons and connecting rods, causing severe damage. I've heard of a friend's car submerged past wheel centers during heavy rain, resulting in staggering repair costs after water ingress. The best approach is to avoid risky water crossings; stop if depth exceeds half the wheel height. Never attempt to restart a stalled engine to prevent further damage. Tow to a shop to inspect engine seals and electronic systems, replacing parts if needed to restore performance. Regular maintenance checks on intake system waterproofing can effectively prevent such issues.