Why does water entering the engine cause it to be scrapped?
2 Answers
Engine water damage leading to scrapping can be attributed to the following reasons: 1. Water entering the engine exhaust pipe: When water enters the exhaust pipe, it can be drawn into the combustion chamber through the exhaust valves. As the valves close and water cannot be compressed, the piston's movement forces the water inside, causing instant damage such as cracked cylinder walls and bent piston rods, rendering the engine irreparable. 2. Water contamination of engine oil: If water enters the engine, it can mix with the engine oil, altering its properties and performance. This contamination prevents the oil from performing its essential functions of lubrication, cooling, sealing, and corrosion protection, ultimately causing harm to the engine.
I once witnessed an engine being completely destroyed by water ingestion. The car stalled in water, and when the driver attempted to restart it, water got sucked into the engine cylinders. Unlike compressible air, water couldn't be compressed when the pistons moved upward. The excessive pressure bent the connecting rods, causing internal components to deform and fracture - the entire engine was totaled. The worst part was water contaminating the engine oil, completely destroying lubrication. Severe friction burned out critical components, and mechanics said only a full engine replacement was viable since repair costs exceeded a new unit's price. Since then, I've been extremely cautious driving through puddles - if water reaches above tire level, I never risk proceeding without first assessing depth and considering detours. Protecting the engine means safeguarding the vehicle's vital heart.
