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. Ammonia is an essential requirement to eliminate nox. Webdec 19, 2023 · no, you should not put water in a diesel exhaust fluid (def) tank. Def is a carefully blended aqueous urea solution made with 32. 5% urea and 67. 5% deionized water. Introducing water into the def tank can cause several issues: 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.
