Can You Drive When the Car's Exhaust Pipe Gets Water Inside?

[AshlynFitz]

You can drive after water enters the exhaust pipe. Here is a detailed analysis: 1. Function of the exhaust pipe: While driving, as long as the engine does not stall, the exhaust pipe continuously emits exhaust gases, which prevents water from entering the interior of the exhaust pipe. Therefore, the engine stalling is the cause of the car stalling, not water in the exhaust pipe. 2. Measures for water ingress: (1) To prevent water from entering the engine, increase the throttle to expel the water using the exhaust. (2) Water in the exhaust pipe may cause blockage, leading to poor exhaust flow and engine stalling. Once the water drains out, you can restart the car. (3) If the engine stalls, do not force ignition; instead, call for rescue services immediately.

[Robinson]

I had a similar experience before. After driving through water, the exhaust pipe got flooded. I didn't pay attention at the time and started the engine, which caused smoke to come out of the engine and nearly totaled it. Later, the mechanic told me that water backing up into the exhaust pipe can enter the cylinders, and starting the engine could lead to seized internal components or bent pistons, resulting in very expensive repairs. Since then, I've learned my lesson: if you find water in the exhaust pipe, never attempt to drive or start the engine. You should immediately push the car to a safe place or call a tow truck to take it to a repair shop for inspection. After driving through water, you should also check the air filter because water can enter through there. Remember, safety comes first—even if the water isn't deep, don't take it lightly. Modern car engines are highly precise, and even a small amount of water can cause serious problems. Don't take the risk.

[VonMelanie]

Driving with water in the exhaust pipe is too risky. Water entering through the exhaust can reach the engine internals, causing hydraulic lock during ignition—meaning the liquid in the cylinder cannot be compressed, leading to piston rod breakage. I've seen several cars completely disabled by this, costing thousands in repairs. The correct approach is to stay calm and avoid starting the engine. Push the car or get help to move it to a dry area first. Check if the water level is below the exhaust pipe height. For minor water ingress, wait for it to drain naturally before starting; in severe cases, call a tow truck. Always control your speed carefully when driving through water to avoid splashing too high—prevention is far more important than repair.

[JasperDella]

Water in the exhaust pipe and still driving? Then get ready to repair the engine. Water backflow can flood the cylinders, and once the engine runs, parts are highly likely to seize and get damaged. A buddy of mine tried it, cutting corners by starting the engine, and ended up with a bent connecting rod, costing a pretty penny. So, if you find water inside, don’t touch the ignition—first ensure a safe stop and push the car out. When wading, maintain low speed to avoid sudden acceleration or big splashes. Quickly check if the exhaust pipe opening is blocked by debris, then tow it to the repair shop for a thorough fix. Don’t delay on small issues—damage is permanent.