Can You Start the Engine If the Exhaust Pipe Is Submerged in Water?

2 Answers
Erin
07/23/25 11:23pm
You should not start the engine if the exhaust pipe is submerged in water. The engine operates by burning a mixture of fuel and air in the cylinders to power the vehicle. If water mixes into the fuel-air mixture, it can cause the engine to stall. Here is some information about car engines: 1. Introduction: The car engine is the device that provides power to the vehicle, serving as the heart of the car. It determines the vehicle's performance, fuel efficiency, stability, and environmental friendliness. 2. Classification: Based on the power source, car engines can be categorized into diesel engines, gasoline engines, electric motors for electric vehicles, and hybrid engines, among others.
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DallasLee
08/10/25 7:18pm
I've been in the auto repair business for over a decade and have seen countless cases of engines being ruined because people tried starting their cars immediately after the exhaust pipe was submerged in water. When the exhaust pipe is flooded, you must never attempt to start the engine. Otherwise, water can be sucked into the engine cylinders during startup, causing what's known as hydrostatic lock—where the pistons get completely stuck. At best, this leads to major repairs costing thousands, and at worst, you'll need a whole new engine, resulting in exorbitant repair costs and significant delays. Safety first! The best approach is to push the car to higher, dry ground and let the water drain naturally from the exhaust pipe. Then, have it towed to a professional shop for a thorough inspection of the exhaust and intake systems to confirm they're dry before attempting to start. Always avoid parking in low-lying areas, and be extra cautious during heavy rain—don’t cut corners on these small precautions to avoid big headaches later.
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