What Causes Engine Abnormal Noise When Driving Through Water?

[OWalker]

The causes of engine abnormal noise when driving through water include water entering the brake pads, foreign objects trapped between the brake pads and calipers, water ingestion into the exhaust pipe, and foreign objects lodged in the chassis. Water entering the brake pads: If the vehicle drives through shallow water and water splashes onto the brake pads, abnormal noise during braking is normal. Simply dry the brake pads to resolve the issue. Foreign objects trapped between the brake pads and calipers: If the vehicle drives through shallow water, foreign objects such as plastic bags or mud may get trapped between the brake pads and calipers, causing abnormal noise during braking. Cleaning the foreign objects will solve the problem. Water ingestion into the exhaust pipe: If the vehicle drives through deep water, water may enter the engine through the exhaust pipe, preventing the fuel and air mixture from burning properly, resulting in abnormal noise. The vehicle should be moved out of the water, and the engine should be cleaned. Failure to do so may lead to engine failure or even complete engine damage. Foreign objects lodged in the chassis: If foreign objects become lodged in the chassis after driving through water, abnormal noise may occur while driving. Cleaning the chassis will resolve the issue.

[SanCole]

I've been repairing cars for over a decade and often encounter situations where the engine makes rattling noises after going through water. This is mostly caused by water splashing into the engine compartment and wetting the belt, leading to it slipping and creating a screeching friction sound. Sometimes, when water sticks to the fan blades, it causes unstable rotation, resulting in a clattering noise. Another issue is that water may enter the air filter, blocking the intake holes, causing the engine to run with restricted airflow, which can easily lead to abnormal noises. Worse yet, if water seeps into the cylinders, it can cause knocking sounds, and in severe cases, lead to bent connecting rods and other damages. That's why I always remind my friends: if you hear unusual noises after driving through water, immediately find a safe place to stop and check the belt and filter. Don't force the car to keep running, as small issues can escalate into major repairs, costing you big time. It's advisable to regularly inspect seals during maintenance to prevent problems before they occur.

[LaAngelo]

I'm a car enthusiast who loves to push my ride. I once experienced a terrifying crackling sound from the engine after fording through water. The culprit could be water seeping into the electrical system—like when spark plugs or ignition coils get wet and short-circuit, causing abnormal popping noises during discharge. Also, water on the drive belt makes it loose and unstable, while the fan splashing water adds to the chaotic noise. Another thought: if the air intake gets blocked by water, the engine struggles to breathe and groans in protest. I've since learned my lesson: now I always slow down when crossing puddles to avoid splashing, and afterward, I pop the hood to check for water traces. Addressing these small issues early can extend your engine's life. Remember, don't rush off—take your time.

[Russell]

Last time I drove through a puddle, the engine made a clunking sound. Upon inspection, I found that water had splashed onto the cooling system fan, causing the blades to rub against water droplets and produce strange noises. Alternatively, water entering the water pump could also result in a clicking sound. Simply put, water causes mechanical components to become slippery and shift, leading to noise. Another common factor is the belt becoming loose when wet, causing the wheels to slip and produce unusual sounds. I think adding a sealing check during routine maintenance can prevent this issue, such as reinforcing weak points with waterproof tape. When driving through water, control your speed to avoid splashing too high.