Why Do Diesel Trucks Need Def?

If you’re new to owning a diesel vehicle or heavy equipment, you should be aware of a key additive. Diesel Exhaust Fluid is what it’s called (DEF). Aqueous urea solution 32 percent, or AUS 32, is another name for this ingredient. 32.5 percent urea and 67.5 percent de-ionized water are used to make it. Continue reading to learn everything you need to know about DEF.

The Environmental Protection Agency (EPA) mandated that diesel engines cut their emissions of nitrogen oxides (NOx) in 2010. Diesel Exhaust Fluid, an additive, is used to achieve this reduction (DEF).

This fluid helps to reduce NOx emissions and pollution in the air. As a result, it aids heavy machinery and trucks in adhering to federal pollution standards. Heavy-duty diesel trucks and equipment have featured a diesel tank and a separate diesel exhaust fluid tank since 2010.

Can a diesel truck run without DEF?

SCR is quickly becoming one of the most critical components in diesel automobiles. With tougher pollution restrictions and regulations, diesel vehicle owners need make sure their SCR systems are in good working order.

It’s also critical to check that the diesel exhaust fluid level is enough. Without DEF, modern trucks will not run. As a result, diesel truck owners must check their fluid levels on a regular basis. Everyone should strive to reduce pollution. Maintaining your vehicle will also help you save money on emissions and DEF.

How often does a diesel truck need DEF?

When it’s time to change your DEF, all newer diesel vehicles include a dashboard warning system. To figure out how much you’ll need, you’ll need to know your engine’s efficiency.

When compared to the amount of fuel used, DEF is consumed at a rate of roughly 2-3%. For a car with a 65-gallon gas tank, this means between 1.2 and 2.0 gallons of DEF will be necessary. DEF should be replenished every third or fourth time you fill up a five-gallon DEF tank. The simplest method to avoid an issue is to simply top off on a regular basis.

Is DEF fluid necessary?

As if finding a clean spot to pump gas wasn’t difficult enough, diesel owners also had to worry about keeping their diesel exhaust fluid (DEF) tanks filled off. What happens if the treatment tank is completely depleted? We did the research and testing so you don’t have to.

Diesel veterans have long known how to deal with this issue. The following primer is intended for newcomers to diesel engines as well as gasoline-engine fans interested in learning more about life on the other side. DEF, commonly known as AdBlue or Blue DEF, is an elixir required to ensure that the exhaust from a diesel vehicle is as pleasant as an Alpine breeze. Those who refuse to listen to DEF risk severe consequences.

DEF is a fluid made up of urea and deionized water in a 1:2 solution that can be purchased at most service stations for $6 to $10 a gallon. To manage some pollutants, it’s stored in a reservoir separate from the gasoline tank and metered into the engine’s exhaust stream. The DEF vaporizes and decomposes into ammonia and carbon dioxide inside the exhaust pipe. Inside the vehicle’s selective catalytic reduction (SCR) catalyst, these two chemicals react with oxygen and harmful nitrogen oxides. Nitrogen, water vapor, and carbon dioxide are produced as a result of this process.

Make certain that any DEF you buy is labeled to meet ISO (International Organization for Standardization) 22241 requirements. While DEF does not deteriorate with age, it can freeze, so keep your supply somewhere warm. Because the contents stay in solution, no shaking or mixing is required prior to use.

What happens if you run a truck without DEF?

Vehicle makers must implement procedures to ensure that vehicles cannot run without Diesel Exhaust Fluid, according to the US Environmental Protection Agency (DEF). The driver of a vehicle receives a succession of alerts on their dashboard displays before the DEF tank runs out (much the same way as if they were running low on diesel). In general, an amber warning bulb will illuminate when the DEF tank level drops below 10%, flashing at 5%, and solid amber warning light will illuminate when the DEF tank level dips below 2.5 percent.

The engine’s power is lowered, a solid red warning is displayed, and the vehicle’s speed is limited to 5 mph until the DEF tank is refilled if the truck is allowed to run out of DEF.

Will DEF freeze in my truck?

DEF, whether in storage tanks or equipment, can freeze and cause problems. When temperatures dip below 12°F, DEF begins to crystallize and ceases to function properly. Because of the precise ratio utilized, the entire mixture can freeze and thaw together like water and ice.

Can you put water in DEF tank?

Registered. There will be no urea sprayed into the exhaust to convert to ammonia if you put water in an EMPTY DEF tank. Ammonia is required to remove NOX (nitrogen oxides) using the SCR system (Selective Catalytic Reducer).

Is it illegal to remove the DEF system?

It’s not difficult to find someone who can modify or remove the Diesel Exhaust Fluid (or DEF) emissions systems on your agricultural equipment if you look hard enough. Given the openness with which this service is provided, a farmer could be forgiven for thinking DEF alterations are permitted.

They aren’t. The EPA Clean Air Act forbids anybody from removing or rendering inoperable an emission control device on a motor vehicle in the United States. Under a different name, the Canadian Environmental Protection Act, Canada has essentially the same statute.

Even though it is forbidden, DEF tampering occurs. What is causing this, and what are the potential consequences?

Early DEF systems, according to Kevin Rossler, Sales Manager for Markusson New Holland Ag in Regina, could be problematic.

“There were early concerns in agricultural equipment as it developed into Tier-Four emissions or DEF systems,” explains Rossler. “An error code from a sensor failing at seeding time could cause you to lose power, which is quite inconvenient. As a result, several operators wanted to get rid of their DEF systems or purchase DEF delete kits to avoid having to utilize them.”

Interfering with a DEF system can get you in trouble with the law, but that’s not the only danger. It will also nullify the manufacturer’s warranty on the equipment. When equipment with tampered DEF arrives at a dealership as a trade-in, it must be returned to its original DEF settings before it can be resold. That’s $5,000 to $7,000, according to Rossler’s experience.

He advises equipment owners to let go of any remaining misconceptions regarding DEF, stating that current versions of the technology work significantly more consistently. DEF systems are unlikely to cause problems in the field, but they’re excellent at what they’re supposed to do: regulate emissions from agricultural equipment and help farming keep its good environmental reputation.

“Early DEF systems are nothing like what we have now,” says Larry Hertz, WEDA’s Regional Vice-President for Canada. “Today, you could place your face right close to the exhaust pipe and nothing would come out. DEF is required by legislation in order to maintain air quality. That’s all the more incentive to leave your DEF alone and let it do its thing.”

What happens when DEF goes bad?

3. Cold-weather worries

Freezing has no effect on DEF, which is good news for individuals who reside in colder areas. It turns slushy at 12 degrees Fahrenheit and freezes solid because it’s 2/3 water. One thing to keep in mind is that DEF expands when frozen, so it’s better not to overfill containers to avoid harm.

DEF can be thawed and utilized without problems once it has been frozen. If you add chemicals or additives to keep the fluid from freezing, you risk contaminating and ruining it.

4. Survive the Heat

While intense cold will not harm DEF, extended exposure to heat and sunlight will. DEF can be harmed by both of these factors.

The temperature at which DEF should be stored is commonly thought to be 50 degrees Fahrenheit. Even if stored in authorized containers in a cool environment, direct sunshine is detrimental to DEF, so keep it indoors or in well-shaded regions.

5. Dispensing Instructions

Keep the nozzle on the container and the fill ports on the equipment clean to avoid contamination when dispensing DEF. Only use the nozzle on the storage container to dispense DEF directly into a machine. Funnels are not suggested since they can become dirty and introduce contaminants into the fluid. Never put DEF in another container, especially one that isn’t permitted, such as a bucket. Even if a bucket is clean, the fluid might be contaminated by dirt or other contaminants.

Diesel exhaust fluid should never be used in a machine’s diesel fuel tank, despite its name implying otherwise. Only use it in the specified DEF tank, which has a smaller hole than a fuel tank and a blue top to make it easy to spot.

Is DEF bad for diesel engines?

While the water and urea mixture is excellent for the environment, it can cause crystals to form, which can clog fuel filters, damage aircraft engines, and cause engine failure. DEF is sprayed directly into exhaust systems and should never be used as a fuel additive, diesel or airplane.