Will the Engine of a Flooded Car Take in Water?
3 Answers
Water will enter the engine if it reaches the level of the air filter. However, for most sedans, there is a risk of water entering the engine once the water level rises above the vehicle's chassis. Below is an introduction to engine water ingress: 1. Hazards: Once water enters the engine, it can cause the engine to stall. In severe cases, water may be sucked into the engine's interior, leading to permanent damage. Never attempt to restart the engine after water ingress; instead, immediately call for roadside assistance. 2. Handling Method: If the engine stalls due to water ingress during driving through flooded areas, turn off the ignition switch immediately. Do not attempt to restart the engine. Move the vehicle to a safe location and try to position it with the front higher than the rear. This allows water in the exhaust pipe to drain out, preventing damage to the catalytic converter and muffler.
I've encountered flooded vehicles several times, and water can indeed enter the engine. If the water level submerges the exhaust pipe or air intake, water will flow directly into the engine interior, damaging components like pistons and connecting rods. If the engine is mistakenly started after flooding, water may lock the crankshaft, causing engine seizure—repairs are both troublesome and expensive. I've seen many cases during repairs: minor flooding requires thorough water drainage and drying, while severe cases demand complete engine replacement. Additionally, rust caused by water persists long-term and may lead to engine failure. Therefore, never turn the key after a vehicle floods—towing it to a professional shop for immediate inspection is the best approach. Early intervention saves significant costs and prevents safety hazards.
In my daily driving, engine water ingress is a common issue. Whenever the water level exceeds the chassis height, water can easily flow into the engine compartment, especially during heavy rain or flooding, where it seeps in through the intake valve or gaps. A friend of mine had his car submerged, and upon starting it, the engine immediately stalled, revealing bent connecting rods. Repairs are time-consuming, requiring disassembly, cleaning, replacement of filters and parts, and may also lead to electrical issues. In the long run, corrosion can weaken the engine's power. I recommend parking on higher ground during normal times, avoiding driving through floodwaters, not starting the engine after submersion, and calling for a tow truck instead—this can save lives and money.
