DEF is urea or otherwise known as aqueous ammonia. Windshield washer fluid that contains ammonia will do in a pinch.
Can you run water instead of DEF?
Subject: RE: Anyone replace DEF with water? Water won't hurt the system but it will de-rate you pretty quick. ECM compares NOx values pre/post, if conversion is low it will start throwing codes and will eventually derate.
Can you use urine instead of DEF?
Following the deductive reasoning that urine has urea in it, therefore, urine + water = DEF is 100% wrong, and will cause you a myriad of expensive mechanical problems. The urea found in urine is not in the proper concentration needed for DEF, nor is it of a sufficient level of purity, in either urea or water.
How do you make DEF fluid?
DEF is a mixture of (typically) 2/3 deionized water and 1/3 urea. It's carefully regulated by the American Petroleum Institute. Technically, urea is derived from one of the byproducts of urine. But it's synthetically made, so no cats are ever harmed in the production of the fluid.
Can you use urine instead of DEF fluid?
DEF and urine are not interchangeable, and if you do decide to pee in your DEF tank, you could be facing some hefty repair bills. Because of the other compounds found in urine, peeing in a DEF tank could ruin the filters and the whole SCR system if used too often.
36 related questions foundCan you dilute DEF?
The DEF will be diluted by the added water, but depending on the ratio of water to DEF, the solution may still contain enough urea to deal with the NOX via an increase in the injection rate.
What is the best DEF fluid?
The best diesel exhaust fluid meets the Environmental Protection Agency's standards and is free from impurities. Valvoline's Premium Blue Diesel Exhaust Fluid is a top choice because it is compatible with all selective catalytic reduction systems and meets the EPA's near-zero nitrogen oxide emissions levels standard.
What happens if you put diesel in your DEF tank?
However, a small number of cases have been reported where diesel has been put in the DEF tank. Diesel is less dense than DEF and will float on top of the DEF in the tank, but even small amounts of diesel can damage your SCR system and we recommend that you contact your dealer immediately and do not drive the vehicle.
Can you fill DEF while engine is running?
DEF is vaporized and decomposes into ammonia and carbon dioxide in the exhaust pipe. In order to ensure that owners take their clean-air responsibilities seriously, the Environmental Protection Agency requires manufacturers of new light-duty diesels to interrupt the normal startup routine when the DEF runs out.
What urea is in DEF?
From a strictly chemical disposition DEF is a mixture of 67.5% deionized water and 32.5% urea. Urea is a compound in Nitrogen that turns to ammonia when heated and is used in a variety of industries. Urea is technically derived from a byproduct of urine but for mass production purposes it is synthetically made.
Is Blue DEF cow urine?
The short answer is no. Commercially available DEF does not contain any animal urine.
Can I pee in AdBlue tank?
But sadly, the answer is "no". A modern clean diesel car will recognize that your pee is not the right stuff. AdBlue solution has a far higher concentration of urea--32.5%--mixed into deionized water.
Can you run a diesel without DEF?
Can You Run A Diesel Engine Without Def? There is no way modern trucks will run without DEF. Drivers of diesel trucks therefore need to check their fluid levels frequently in order to make sure they're as good as possible. It is everyone's responsibility to reduce emissions.
How many miles will 1 gallon of DEF last?
Most DEF tanks require one gallon of DEF for every 50 gallons of diesel fuel, and one gallon will generally last between 300 to 500 miles.
Can you bypass diesel exhaust fluid?
If you're thinking of bypassing any of your diesel's emission controls, remember that that it's highly illegal and the fines can be steep. The chances of getting caught may be low, but the consequences are costly.
What does Blue def?
BlueDEF® Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (SCR) systems in diesel vehicles. DEF is used to help convert NOx to harmless nitrogen and water.
Will DEF freeze in my truck?
Diesel Exhaust Fluid or DEF Fluid
Whether in storage tanks or in equipment, DEF can freeze and possibly cause issues. As temperatures drop below 12°F, DEF will begin to solidify and not work as intended.
Can you mix different brands of Def fluid?
Registered. I've mixed different brand of DEF and never had an issue. Just make sure it meets the required specs.
Is there different DEF fluid?
Are All DEF Fluid Brands The Same? All DEF is not created equal. Any fluid claiming to be DEF must meet quality specifications set by the ISO (International Organization for Standardization). First, DEF must have a urea concentration of 32.5%.
Is there any difference in DEF fluids?
There is one operational difference to note: Like any water-based fluid, DEF expands when it is frozen (by approximately 7 percent). In cold weather, when the operator shuts the vehicle down, waiting 60 seconds before turning off the battery will allow the fluid to drain back out of the hoses and into the DEF tank.
What is a DEF head?
Essentially, the DEF head monitors the DEF system. The DEF head communicates the quality (or concentration of urea) of the fluid is within spec. It relates that there is, in fact, DEF in the tank (quantity). This part also reports the temperature of the DEF is in a safe range.
Where is the DEF level sensor?
A DEF quality sensor is mounted on the side of the DEF tank. This sensor detects the Urea concentration in the DEF to confirm it is acceptable for effective dosing (approximately 32.5% Urea).
What is a DEF quality sensor?
DEF Quality Sensor
The quality sensor alerts the user if the solution deviates from the acceptable concentration range or if there are any contaminants present in the DEF tank. DEF concentration directly influences SCR system performance.
