Can a Car Engine Be Washed with Water?
2 Answers
Car engines can be washed with water, but it is not recommended. Especially when the engine is hot, it is not advisable to wash it directly. When the engine is hot, the internal components are at high temperatures, and sudden external cooling can easily lead to dangerous situations. Additionally, the most important reason not to wash the engine directly is that the computer board is located close to the engine. While the engine is a relatively sealed environment, the computer board is not, and water contact can easily damage it. Below is an introduction to engine protectants: 1. Overview of Engine Protectants: Engine protectants, also known as engine anti-wear protectants, are maintenance agents that effectively reduce wear or corrosion of engine components, inhibit the formation of deposits such as gum and sludge, and form a protective layer on metal surfaces with high compressive strength and excellent wear resistance. They prevent engine oil from oxidizing, thickening, or acidifying, thereby protecting engine components and extending engine life. 2. Functions of Engine Protectants: The functions of engine protectants include anti-wear, lubrication, noise reduction, improving engine power, and saving fuel. Some also prevent oil burning and have carbon deposit cleaning functions.
I've worked in the auto shop for over a decade and often see car owners rinsing their engines with water - I really don't recommend this. The engine bay contains too many sensitive electronic components like the ECU, wiring harness connectors, and fuse boxes that can easily short-circuit when wet, and repairs are extremely expensive. Moreover, when a hot engine encounters cold water, the thermal expansion and contraction can warp or even crack components. Cleaning an engine requires proper technique - wait until it cools down, preferably use professional foam cleaner with soft brushes, and thoroughly dry all corners with compressed air afterward. When servicing regular customers' vehicles myself, I always remind them never to cut corners - one careless water rinse could cost thousands in repairs. Safety should always come first.
