Def is a carefully blended aqueous urea solution made with 32. 5% urea and 67. 5% deionized water. Webaug 30, 2023 · simply put, no. Replacing the def fluid with water will prevent the formation of ammonia, which is essential to reducing nox emissions.

In conclusion, def tanks. Webdec 19, 2023 · no, you should not put water in a diesel exhaust fluid (def) tank. Introducing water into the def tank can cause several issues: Weboct 4, 2012 · if you put water in an empty def tank, there will be no urea injected into the exhaust to convert to ammonia.