Will Diesel Exhaust Fluid Freeze?

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.

How do you keep def fluid from freezing?

During the winter, keeping your truck in a warm or insulated garage can help keep your DEF from freezing. Similarly, an insulated tote blanket can keep you warm.

TruckSeries has further information on your truck’s individual after-treatment system.

How do you winterize a DEF fluid?

A polyethylene DEF tank is positioned inside the front enclosure of the FST Series Trailers. To winterize these DEF systems, follow these steps:

1. Connect the DEF hose female quick connector to the DEF auto shut-off nozzle’s male connector.

2. Set the DEF pump to “Trailer Fill” mode. Allow the pump to run for 30 seconds while pressing the nozzle handle. WHILE THE PUMP IS RUNNING, disconnect the quick coupler from the nozzle. The DEF fluid will be ejected from the nozzle as a result of this action. Cover the dust with a dust cover.

3. Turn the pump off by pressing the “Off” button.

4. Connect the DEF hose female fast connector to the Micro-Matic RSV coupler’s male quick connector. Connect the RSV coupling to the FST DEF tank’s RSV valve.

5. Select “Trailer Fill” on the DEF switch. For 2 minutes, run the pump. The fluid will be drained from the pump and piping as a result of this action.

6. Turn the DEF pump off by pressing the “Off” button.

7. If the fluid level is not above the maximum fill line, the FST DEF tank can freeze and expand.

If the fluid level in the tank is higher than the maximum fill line when it freezes, the tank will be damaged.

Can DEF be stored outside?

If DEF is kept outside, it must be kept out of direct sunlight. If DEF is exposed to direct sunlight for an extended period of time, it will begin to lose its urea potency. DEF should be kept at or below 86°F (30°C) in the coolest area of the storage facility. If it is not viable to store DEF below 86°F (30°C), manage the stockpile accordingly.

At what temp does diesel freeze?

What is the temperature at which diesel fuel gels? That’s a tough question to answer because your diesel-powered vehicle won’t drive anywhere in the cold if you don’t prepare properly. Fortunately, the problem can be readily avoided by applying a gasoline additive, which can help stop gelling from happening in the first place. While it’s important to prepare your vehicle before the cold weather arrives, acting quickly can help you avoid a breakdown.

At What Temperature Does Diesel Fuel Gel?

When the temperature drops below 32 degrees Fahrenheit, the paraffin in diesel fuel begins to harden, clouding the fuel tank. This modification will not prevent you from driving, but it will serve as a reminder of how colder weather affects gasoline use.

Gelling happens when the temperature falls between 10 and 15 degrees Fahrenheit, blocking the gasoline tank and fuel lines. You may need to have your vehicle towed to a garage at this stage so that your mechanic may repair any damaged fuel lines and thaw the fuel tank.

How Do You Prevent Diesel Fuel From Gelling?

If you utilize a fuel additive, you can drive a diesel car in subzero temperatures. A fuel additive designed for diesel engines decreases the fuel pour point (the temperature at which it freezes) by as much as 40 degrees. It also inhibits gelling by dispersing water.

The crystals that form in diesel fuel during cold weather are altered by a diesel fuel additive. The additive lowers the size of the crystals in diesel fuel, preventing it from waxing or gelling. It alters the fuel’s chemical characteristics, allowing it to flow at temperatures considerably below zero degrees.

If the diesel has already gelled, an additive can help. To begin, empty the tank and disconnect the fuel line. Typically, this entails pouring the additive into the tank and waiting 20 minutes for it to break down the gel before starting the vehicle, but check any directions carefully to ensure you’re following the appropriate steps. Allowing your vehicle to idle for a few minutes will allow the fuel lines to clean.

Cold Weather Preparation

There are a few more things you can do to prepare your vehicle for cold weather besides utilizing a diesel fuel additive. First, make sure your battery is in good working order. When the weather turns cold after a hot summer, the battery is more vulnerable to failure. Replace your battery if the reading is less than 12.45 volts on a multimeter. You don’t want to have to deal with battery troubles on top of fuel issues.

Second, if temperatures are really low, an addition may not be sufficient. Keep in mind that an additive can reduce the pour point by up to 40 degrees. It can prevent blockage in temperatures as low as minus 30 degrees Fahrenheit. We all know that colder temperatures are feasible, and that the addition may become useless as a result. Even if the temperature does not drop that low, a block heater may be required, especially if you park outside. Make it a habit to turn on the block heater when the temperature drops below freezing.

You may avoid being stranded on even the coldest days if you take excellent care of your diesel vehicle and its gasoline.

NAPA Online has a comprehensive list of fuel additives, or visit one of our 17,000 NAPA AutoCare facilities for routine maintenance and repairs. Consult a trained specialist at your local NAPA AUTO PARTS shop for more information about diesel fuel.

What temp does DEF freeze Celsius?

DEF Freezes at What Temperature? If you use the recommended 32.5 percent urea concentration in your Diesel Exhaust Fluid, you’ll receive the lowest attainable DEF freezing point of 12 degrees Fahrenheit or -11 degrees Celsius.

Does DEF freeze Duramax?

The renowned Duramax 6.6L Turbo Diesel has been improved to provide more horsepower and torque than ever before. This tried-and-true powerplant gets the job done while being more environmentally friendly.

When compared to the 2010 model, the upgraded Duramax features the most up-to-date pollution control technology, resulting in a 63 percent reduction in nitrogen oxide (NOx) emissions. GM engineers found that using a Selective Catalytic Reduction (SCR) system with Diesel Exhaust Fluid was the best approach to achieve this amazing reduction in diesel emissions (DEF).

Because it treats the vehicle’s exhaust after combustion, the SCR system is classified as an after-treatment system. The following is how it works:

  • NOx emissions are broken down when ammonia, combined with exhaust gases, hits the SCR catalyst.
  • During regeneration cycles, the Diesel Particulate Filter (DPF) catches soot and incinerates it.

Diesel Exhaust Fluid (DEF) is a non-flammable fluid made up of 33% ammonia-based urea and 67% purified water. DEF is a chemical that is used in diesel engine exhaust systems to reduce emissions by converting nitrogen oxide (NOx) to nitrogen and water vapor. DEF technology has a long track record in Europe, where it has been utilized for many years.

DEF is used by the SCR system at a rate of 1 to 1.25 percent of the diesel fuel used by the vehicle. A full tank of DEF gives you around 8,000 kilometers of driving range. Range will vary depending on driving circumstances because DEF is directly tied to fuel consumption.

A 5.3 gallon (about 20L) DEF tank is situated under the passenger side of the cab. The DEF tank fill point, as well as other fluids that require regular maintenance, is conveniently positioned beneath the hood. A blue cap easily distinguishes it. REMEMBER NOT TO OVERFILL THE DEF TANK.

Depending on the storage temperature, DEF has a shelf life of at least one year. It’s preferable to keep it at room temperature and away of direct sunlight. Small DEF spills can be cleaned up by absorbing the liquid with dry dirt, sand, or another non-combustible substance, then scooping it into a container for disposal. Although DEF is not classified as a hazardous waste by the federal government, please dispose of it properly. Do not pour this item or its container down the drain; instead, dispose of it in accordance with all applicable local and national rules.

When it comes to maintaining a proper DEF level, this technique eliminates the need for guesswork. An electronica onboard warning system displays a number of warnings in the Driver Information Center to assist you in maintaining proper DEF levels, as well as to inform you if the DEF quality is inadequate or if the system is malfunctioning. The electronic onboard warning system and its warning signals are described in detail in the Duramax owner’s manual supplement.

When the DEF level is about 1,500 km remaining range, the electronic onboard warning system will send a message to the driver. As the DEF tank gradually empties, additional messages that must be acknowledged inform the driver at the 500 km, LOW, and 0 km fluid ranges. For the vehicle to run properly, the fluid level in the DEF tank must be maintained. The mechanism will inform the driver if the DEF tank is let to run dry. If no fluid is added before the next vehicle start, the vehicle’s speed will be limited to around 88 km/hr, and eventually to 7 km/hr, as required by federal regulations.

To remove the car from any speed restriction, always add at least 4 L. The system resets itself after being replenished, so no service visit is required. The DEF level warning may take up to 30 seconds in park or several kilometers of driving to refresh.

The tank and DEF system are designed to freeze in cold climates because DEF freezes at around -11 degrees Celsius. Even if the DEF is frozen, the vehicle will start normally. The DEF fluid is thawed in a second tank within the DEF tank that is heated at 270-minute intervals while the engine is running. This cycle was initially 90 minutes, which caused some freezing issues with trucks that were left in cold areas for long periods of time, but the new program extends it to 270 minutes to guarantee that enough DEF is circulated to keep the truck running at peak performance. The leftover DEF in the bigger tank is heated and thawed with the help of residual heat from this internal tank. Do not overfill your DEF tank since freezing causes the fluid to expand, which can harm the tank.

Does diesel freeze in cars?

Fuel efficiency is roughly 10% worse at -5°C than it is at 20°C, according to official fuel testing. Furthermore, when temperatures drop below 0°C, fuel economy can drop by as much as 20% for vehicles travelling less than 4 miles – so what’s going on?

Given that petrol’s freezing point is a cold -60°C, a petrol tank will almost certainly not freeze during even the harshest British winter. Diesel, on the other hand, has a much lower freezing point and is more likely to gel in cold temperatures. To tackle this, fuel firms have developed a summer and winter diesel blend that can withstand temperatures as low as -5°C and as high as -15°C.

Given that neither fuel is significantly affected by cold weather, it’s evident that the problem isn’t with the liquid itself, but rather with the effect of the cold on the car’s mechanics.

Cold weather can impact a variety of components in your car, resulting in a significant reduction in fuel efficiency. We’ve compiled a summary of some of the negative affects that cold weather can have on your car’s fuel economy.

  • It takes much longer for your engine to achieve its ideal operating temperature on a cold day. This is especially problematic for short excursions, as the automobile will spend the majority of its time operating at a lower-than-optimal temperature, resulting in poor fuel economy.
  • In cold weather, engine oil thickens. This can cause friction between moving parts in the engine and transmission system, resulting in unnecessary fuel use.
  • Fans, defrosters, wipers, and heated seats are all electrical components that place additional demand on the battery. As a result, the alternator has a harder time keeping the battery charged, resulting in a decrease in fuel economy.
  • It’s common to have to warm up your automobile to defrost and demist the windscreen on bitterly cold mornings. This type of idling has a significant impact on fuel efficiency, with your automobile obtaining zero MPG for the duration.
  • Cold air is thicker and denser than warm air, which increases your car’s aerodynamic drag. This requires the engine to work harder, especially at highway speeds.
  • In extremely low temperatures, tyre pressures drop somewhat, increasing the vehicle’s rolling resistance.

How cold does it have to be for diesel to gel?

  • Gelling: It’s unusual to have a situation where the fuel practically turns to jelly. Gelling happens when the paraffin wax in diesel solidifies due to a drop in temperature, and the fuel’s temperature must be kept below minus 10 degrees F for extended periods of time, such as 48 to 72 hours. When diesel is cold soaked, the paraffin wax in the fuel hardens, giving it a hazy look. At temperatures as high as 32 degrees F, the fuel will begin to cloud, but it will continue to flow. Before the fuel can gel, it must be kept at a very low temperature for an extended period of time. It’s common to hear drivers complain about their fuel gelling up, but this is almost certainly not the issue they’re having. Ice or solidified paraffin wax in the fuel filter is more likely to be the issue. There’s more on that later.
  • Cloud Point: To determine the cloud point of a sample of diesel fuel, which is the temperature at which the naturally present paraffin wax in #2 diesel fuel begins to crystalize, there are prescribed methods. The fuel has a hazy look due to the microscopic particles of suspended hardened wax. Cloud point temperatures for diesel fuel typically vary from -18°F to +20°F, but can reach +40°F depending on a variety of factors connected to the base stock and refining operations. The cloud point of so-called winter diesel fuel (#1 diesel or kerosene) is substantially lower since it contains relatively little paraffin. Fuel distributors will test the product and, if requested, may include the results in tenders and delivery receipts.
  • The temperature at which a liquid loses its flow properties is known as the pour point. The pour point of diesel fuel changes according on the wax content in the fuel, which varies depending on the source of the base stock, the refining process, and the type and quantity of additives added to the fuel during refining or distribution. The difference between the cloud point and the pour point is always there, with the latter often being 2° to 20°F lower than the former. To establish the pour point of a fuel sample, certain tests must be performed. Bulk providers, as previously stated, can supply this information.
  • When diesel fuel is cooled, the cold filter plugging point is a measurement based on a standardized test that indicates the rate at which it will flow through a standardized filtration equipment in a given amount of time. The CFPP is the point at which the sample fails to pass through the filter in the time allotted.

Can you store DEF in the cold?

The Farmer’s Almanac predicts brutally cold weather in the eastern sections of the Rockies and east to the Appalachians in the winter of 2019–2020. Temperatures in the Northeast are expected to be bitterly chilly. There is usually enough of annual winter preparation for towns, public utilities, landscapers, and others involved in outside labor and snow removal.

The appropriate management of diesel exhaust fluid (DEF), which is utilized in many diesel-powered trucks and other pieces of equipment, is one issue that may be missed. In the winter, vehicles filling up on the road and retailers may find it difficult to handle and store DEF. DEF, which is made up of technically pure urea and purified water, freezes at 11 degrees Fahrenheit and must be carefully stored and administered to retain its purity.

DEF, like water, expands by up to 7% when frozen, causing damage to storage tanks that are full or almost full when it freezes. It’s a good idea to keep a tank that could freeze if it’s not completely full. If DEF in a vehicle freezes, do not add any additives to make it melt. DEF must remain pure in order to function properly. The car will start without issue, and the DEF tank features a heating element that allows the DEF to be immediately thawed. Don’t panic; on-spec DEF is specially engineered to allow the fluid to thaw at the correct concentration, ensuring that your vehicle continues to operate smoothly.

There are other factors to consider when acquiring, storing, and handling DEF besides the cold. Drivers who are used to buying DEF in bottles should check the expiration date on the bottle and utilize it before that date, as the product has a short shelf life. In the absence of a date, request the most recently delivered DEF goods. Check the bottle for the American Petroleum Institute (API) certification logo as well. Drivers should use API-licensed DEF, according to many diesel engine manufacturers.

DEF quality is affected by storage conditions. In ideal settings, DEF should have a shelf life of at least 12 months, if not longer. The recommended storage temperatures can be seen on the label. API does not advocate storing DEF in automobiles for an extended period of time after purchase, especially if the vehicle’s storage place is regularly exposed to high heat or sunlight.

What temperature should DEF be stored at?

DEF is the reactant required for the SCR system to work. It’s an aqueous urea solution made up of 32.5 percent high grade urea and 67.5 percent deionized water that’s been thoroughly combined.

Urea is a nitrogen molecule that, when heated, converts to ammonia. It’s employed in a range of industries, including agriculture as a fertilizer.

Cummins Filtration does not advise customers to build their own DEF. DEF has stringent standards for maintaining ingredient concentration and purity, which is important to the SCR system’s good operation and lifetime. DEF used with Cummins and other OEM SCR systems must meet all ISO22241 parameters as well as API certification requirements, according to Cummins and other OEMs. End users are advised to acquire certified DEF rather than combining it themselves. Refer to ISO22241 for further information on the quality requirements, which covers DEF quality, handling, testing, shipping, storage, and refilling.

API Certification is a voluntary program administered by the American Petroleum Institute (API) that certifies and monitors compliance with ISO requirements for diesel exhaust fluid. The program began in March of 2009. Cummins Filtration DEF presently complies with ISO standards and is API approved.

Yes, a concentration of 32.5 percent urea is good because it has the lowest freeze point. SCR systems will also be tuned to 32.5 percent, resulting in optimal NOx reduction during operation.

At 12 degrees F, a 32.5 percent DEF solution begins to crystallize and freeze (-11 deg C). Both the urea and the water will freeze at the same rate at 32.5 percent, ensuring that the fluid does not become diluted or over concentrated as it thaws. The freezing and thawing of DEF will not cause the product to degrade.

When DEF is frozen, it expands by approximately 7%. The container and tanks for DEF are built to expand.

What can I do to prevent the DEF from freezing? What happens if the DEF in the vehicle’s tank freezes?

SCR systems are meant to provide heating for the DEF tank and supply lines while the vehicle is in operation. If DEF freezes when the car is turned off, the vehicle’s start-up and regular functioning will not be hampered. The SCR heating system is designed to swiftly return DEF to liquid form while ensuring that the vehicle’s operation is unaffected. The freezing and thawing of DEF will not cause the product to degrade.

Is it possible to add an anti-gelling or freeze point improver to DEF to keep it from freezing?

No. While an addition could increase the mixture’s freeze point, the 32.5 percent solution is designed specifically to reduce NOx emissions. Any further blending or tweaking of the DEF mixture may obstruct its capacity to function properly and may damage SCR components. Today, no additives of any kind are permitted in DEF. Cummins Filtration will ensure that our product meets ISO requirements if ISO regulations alter to enable antifreeze additives.

DEF should be stored away from direct sunlight in a cold, dry, well-ventilated location. While the ideal storage temperature for DEF is up to 77 degrees Fahrenheit (25 degrees Celsius), short exposure to higher temperatures has little to no effect on the product’s quality.

DEF’s shelf life is determined by the ambient storage temperature. DEF will deteriorate over time as a result of temperature and sun exposure. The shelf life standards stated by ISO Spec 22241-3 are the minimum shelf life requirements when stored at constant temperatures. Shelf life is easily one year if stored between 10 and 90 degrees Fahrenheit. The shelf life is two years if the maximum temperature does not reach 75 degrees Fahrenheit for an extended length of time.

What will happen to DEF if it is exposed to high temperatures for an extended period of time?

While DEF exposure to a consistent, high storage temperature may shorten its shelf life, operators need not be concerned. Extensive testing in extremely hot areas confirmed that DEF held at a constant temperature of 95 degrees Fahrenheit had a shelf life of more than 6 months.

DEF is non-toxic, non-polluting, non-hazardous, and non-flammable. It is colorless, stable, and fulfills approved international purity and composition requirements. When handled appropriately, DEF is safe to handle and store, posing no major risk to persons, animals, equipment, or the environment.

If DEF is spilled, keep it contained and absorb it using an inert, non-combustible absorbent medium like sand. To dispose of the material, shovel it into a suitable container. Spills into drains should be avoided at all costs. If you pour something down the drain, rinse it out thoroughly with water. Contact your local authorities for proper disposal procedures if you have a large quantity. If DEF spills on your car, wash it off with water. Check out our Spill Kits and Sorbents.

DEF should never be taken orally. Do not induce vomiting if it has been consumed. If you start to notice any symptoms, you should see a doctor.

While pumping DEF will not cause considerable exposure, inhalation may occur if DEF is misted into the air or if exposed to DEF in a closed environment. Harmful consequences are unlikely to occur under regular settings of use. If you inhale DEF, you should get some fresh air and get medical help if symptoms such as nose and throat irritation occur or persist.

DEF has a mildly unpleasant odor that is similar to ammonia, but it is perfectly safe.

DEF is corrosive to copper, brass, and other metals, among other things. In the DEF tank, packing, and dispensing apparatus, only permitted materials such as high density polyethylene (HDPE) shall be utilized.

Evaporation will occur over time due to DEF’s 67.5 percent water content. Cummins Emissions Solutions has produced and supplied over 250,000 SCR systems, while Cummins has built and shipped over 50,000 SCR equipped engines. These SCR engines and systems are in use all over Europe, especially in the warmer regions of Spain, Greece, and even the Middle East, with no evaporation issues. Furthermore, our field test vehicles in high-temperature areas across the United States have not produced any significant levels of evaporation that would impair engine performance or operation. It’s critical to maintain the DEF tank’s and storage containers’ caps properly closed as a precaution. The DEF tank should be drained if the urea content becomes higher or lower than recommended over time. Cummins Filtration will provide testing equipment for DEF’s urea concentration.

What precautions have been taken to avoid diesel being injected into the DEF tank?

The standard nozzle diameter for dispensing DEF is 19mm, but the normal nozzle diameter for diesel fuel is 22mm. In addition, the DEF tank’s tank cap will be blue to distinguish it from the diesel tank.

When the SCR system detects a solution other than DEF, the DEF indicator light illuminates, alerting the driver. The vehicle may need to be serviced depending on the level of contamination in the tank.