Can a Car Engine Be Washed with Water?

2 Answers
AddysonLee
07/24/25 10:30am
The engine of a car is not recommended to be washed directly with water. Here is an introduction to the principles of washing an engine with water and the working environment of the engine: 1. New cars have better waterproofing functions and can be washed directly; vehicles older than three years are not recommended to be washed with a water gun—instead, a damp cloth can be used. 2. If washing with water, avoid electrical circuits and take appropriate waterproofing measures, such as covering the generator, distributor, and brake fluid reservoir with plastic bags. 3. A car engine operates under high temperatures for extended periods. If too much dust and debris accumulate in the engine compartment, the engine's heat dissipation will be significantly affected, accelerating wear and aging.
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VonWillow
08/11/25 5:36am
Having driven for decades, I've witnessed many friends cause serious trouble by hosing down their engines. The engine bay is packed with delicate components like wiring, spark plugs, and computer modules – a splash of water can easily lead to short circuits and failure, leaving the car completely unable to start. Worse still, if the engine is still hot, cold water can cause metal parts to contract and crack, doubling repair costs. Modern vehicles are designed with compact layouts, making reckless water spraying akin to playing with fire. For regular maintenance, I always use professional foam cleaners – just spray a layer, let the grime break down automatically, then wipe it off with a soft cloth. It's hassle-free and safe. Regular cleaning helps reduce dirt buildup and prevents overheating risks, but water washing is absolutely not recommended. Professional car washes use specialized equipment for this job – much more reliable. Remember, engine cleaning is a technical task; cutting corners will inevitably lead to problems sooner or later.
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