Will there be any problems if the car stalls in water and then starts again?
2 Answers
The engine may have been damaged if the car stalls in water and then starts again. Here is an introduction about water-damaged vehicles: Introduction: A water-damaged vehicle refers to a car that has been soaked in water, usually meaning the engine and transmission have been submerged. Hazards: Firstly, it can cause damage to the electronic control systems inside the car. The mixed rainwater is highly corrosive and can affect the functionality of electrical components, especially impacting future use. Since most cars are equipped with electronic control systems (such as engine ECU, ABS system, SRS system, GPS navigation, etc.), if water enters, it can cause short circuits in the ECU's internal IC circuit board and rust on connector terminals, gradually leading to corrosion of metal parts and poor contact in circuits. In severe cases, it may even cause short circuits and burnouts.
I've been driving for decades and seen many cases of water entering vehicles. That time during a heavy rainstorm, my old car stalled in the water, and foolishly I tried to restart it. Later I realized the severity: if water rises above the exhaust pipe or wheel axle level, it can enter the engine, causing hydrostatic lock (water hammer effect) that may seize pistons or damage cylinders. What's worse, floodwater often contains silt that can infiltrate engine internals or electrical systems, corroding sensitive components. Even if the engine starts and sounds fine initially, within days you might experience hard starting, rough idling, or white smoke. Ultimately, you'll face expensive engine repairs, sometimes requiring transmission inspection too. My advice: immediately turn off the ignition, don't attempt to move, call a tow truck for comprehensive garage inspection - especially checking the air filter, engine oil, and electrical wiring. Safety first! Such situations can't afford delay, or repair costs might exceed a new car's price.
