Want to flush the engine? Think twice

Before washing the engine, know that the risk is not in the dirt, but in the excess of zeal. Not every suggestion is harmful

Not all cleaning is good because of the long-term risks. (Photo: Adobe Stock)
By Boris Feldman
Published on 2026-04-27 at 09:00 PM
Updated on 2026-04-27 at 09:20 PM

After all, do you wash the car engine or not? For those who like to lift the hood and find it clean, it’s good, wash. But running with some dirt covering the engine does not harm its operation at all.

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For those who like to wash it at home, you have to pay close attention not to direct the water jet to the electronic elements. Especially the electronic center, because any deficiency in the seal only needs a little water to enter to oxidize it internally.

Someone once commented to me: “because I washed the engine of my car last week, I threw a lot of water everywhere and nothing wrong happened.” And I said: “you think oxidation happens in two or three days, right? We’ll talk in a month, okay?”

Boris Feldman

Journalist and engineer with 50 years of experience in the automotive press. Led newspaper and television teams and hosts the AutoPapo program on radio stations across the country.

Boris Feldman
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