
Whether wading through water affects an automatic transmission vehicle depends on the depth of the water, which is determined by the height of the vehicle's chassis, specifically the ground clearance listed in the model's parameter configuration table. If the air intake is below the water level during wading, water will be sucked into the engine's cylinders. Since water cannot be compressed like air, it can cause severe damage to the engine's mechanical components (such as connecting rods, pistons, crankshafts, etc.). Therefore, the wading depth should not exceed the height of the engine's air intake. Installing a snorkel can raise the engine's air intake height, thereby increasing the maximum wading depth. Generally, the greater the ground clearance and the higher the chassis, the safer the vehicle is when passing through waterlogged roads. In terms of safe wading depth, off-road vehicles and SUVs have obvious advantages. However, for most compact and small cars with low chassis, the position of the vehicle's air intake should be used as a benchmark when passing through waterlogged roads. If wading is unavoidable, the following safe and correct operations should be performed: Before wading, always turn off the auto start-stop function to prevent the engine from automatically restarting if the vehicle stalls in the water, which could cause severe damage due to water entering the engine. Assess the underwater road conditions based on how preceding vehicles pass through and choose an appropriate entry point. Observe the path taken by other vehicles and follow their tracks at a low speed, avoiding sudden acceleration or deceleration. On roads prone to water accumulation, use warning water level markers, trees, or other vehicles' wheels and doors as references to estimate the water depth before deciding whether to proceed. Know your vehicle's safe wading depth. If the water depth exceeds half the tire height or the engine's air intake, avoid entering the water and choose an alternative route instead.

Driving through water without stalling the engine is not safe and carries significant risks. With twenty years of driving experience, I've witnessed similar cases. In deep water, the engine may not stall due to a blocked air intake or sheer luck, but water could have already entered the intake manifold, potentially causing hydro-lock upon restart, leading to piston and crankshaft damage. For automatic transmission vehicles, water entering the transmission vent can mix with the oil, causing lubrication failure. Water exposure can also short-circuit electronic components, such as burning out the ECU control unit. Additionally, water splashing onto brake discs can reduce braking effectiveness. After driving through water, be alert for symptoms like increased engine noise, sluggish acceleration, or warning lights, and seek immediate repairs to prevent further issues. The safe wading depth should not exceed half the height of the wheels, and maintain steady throttle without sudden acceleration when crossing. In rainy conditions, avoid waterlogged areas to minimize the risk of water exposure and prevent potential hazards.

As the breadwinner of the family, I worry about such incidents every day when using my car. A car that doesn't stall after driving through water may seem fine on the surface, but it actually plants the seeds of future trouble. Water can seep into engine crevices, contaminating the cooling system and leading to overheating. If water enters an automatic transmission, repairs can cost thousands or even tens of thousands. Corrosion in electrical circuits might even trigger the airbag system. After driving through water, watch for sudden increases in fuel consumption or unusual odors—these require immediate attention. If left unrepaired, rust on chassis components can halve their lifespan. For example, last time during heavy rain, I forced my way through a water puddle, and later had to spend a fortune fixing brake issues that caused strange noises. It's advisable to clean the chassis immediately after driving through water and regularly inspect seals to keep them dry. Remember, safety comes first—don't skimp on small expenses.

I experienced water panic right after getting my driver's license. A car that hasn't stalled isn't necessarily safe—there are significant hidden dangers. Water entering the engine can cause cylinder seizure and total failure; automatic transmissions may jam or malfunction; electrical systems can short-circuit, triggering multiple warning lights. After wading through water, degraded fluids can cause engine shaking and power loss, requiring attention. Keep wading depth below half the tire height, and maintain a slow, steady speed to prevent splashing. After crossing, park and inspect the undercarriage for water marks to clean up.

From a mechanical perspective, driving through water without stalling still poses risks. Water can be sucked into cylinders causing detonation damage; automatic transmission seals are prone to water ingress leading to lubrication failure; electrical circuits may short-circuit when wet, potentially paralyzing vehicle controls. Residual water accelerates corrosion of chassis, suspension, and other metal components. When fording, keep water level below wheel hub center and proceed slowly, then inspect fluids and perform cleaning/rust prevention. Water crossing is no trivial matter - long-term vehicle damage and costly overhauls are inevitable without prompt repairs.


