Mercedes Mullins
Diesel fuel gelling is a common issue in colder climates, occurring when the fuel thickens or 'gels' due to low temperatures, affecting the engine's performance. Gelling typically happens when temperatures drop below 10 to 15 degrees Fahrenheit (-12 degrees Celsius), causing the fuel to solidify and blocking fuel lines, pumps, and injectors. This issue can be prevented and addressed through various methods, including the use of fuel additives, heaters, and kerosene. Preventative measures, such as using anti-gel products and maintaining proper fuel quality, are crucial to avoid the challenges and costs associated with gelled diesel fuel.
Characteristics and Values Table for Fixing Gelled Diesel Fuel
| Characteristics | Values |
|---|---|
| Cause | Gelling occurs when diesel fuel thickens or gels in cold temperatures, impacting the engine's operations. |
| Signs | Loss of power, cloudy fuel appearance, white smoke from the exhaust, engine stopping while idling, vehicle starting but not running continuously. |
| Prevention | Keep fuel warm, use fuel additives, treat fuel with kerosene, store vehicle in a climate-controlled garage, use fuel heaters, or buy winterized diesel blends. |
| Fix | Use anti-gel products, de-icers, heat fuel filters, replace fuel filters, use diesel winter rescue additives, warm the vehicle in a heated shop, or use standalone heat units. |
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What You'll Learn
Use anti-gel products
Using anti-gel additives is a highly effective method to fix gelled diesel fuel. These additives are designed to lower the Cold Filter Plugging Point (CFPP), which is the lowest temperature at which fuel can flow through a filter. The wax component in diesel fuel is the main cause of gelling, and anti-gel additives reduce the freezing point of the wax, preventing it from solidifying and blocking the fuel filters.
There are various anti-gel products available on the market, such as Fuel Ox™ Cold Charge, which is a preventative measure to stop fuel from gelling. For already gelled fuel, Fuel Ox™ Heat Bomb is recommended to restore the flow of frozen fuel lines. Howes Diesel Treat is another popular option, known for its effectiveness in preventing gelling even in the coldest climates. It is safe to use in all diesel and biodiesel fuels and is trusted by truckers and farmers alike.
When using anti-gel additives, it is important to follow the instructions on the product packaging. Generally, the amount of additive required depends on the volume of fuel and the temperature. For example, one ounce of Fuel Ox™ can treat up to 80 gallons of fuel. It is also recommended to add the additive before the cloud point of the fuel, which is when the wax begins to separate from the fuel and cause gelling.
In addition to using anti-gel additives, other measures can be taken to prevent and fix gelled diesel fuel. For example, ensuring that the fuel is stored in a warm environment can help prevent gelling. Fuel heaters can also be used to warm the fuel and melt any frozen components. Standalone heat units or a smaller 50-watt pan heater can be added to the transmission to keep the fuel warm.
By using a combination of anti-gel additives and maintaining the fuel at adequate temperatures, gelled diesel fuel can be effectively managed and prevented. These measures ensure the smooth operation of diesel engines and help avoid the issues associated with gelled fuel, such as blocked filters, loss of power, and hard starts.
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Store vehicles in a warm place
Storing your vehicle in a warm place is an effective way to prevent diesel fuel gelling. Gelling occurs when diesel fuel thickens or 'gels' in cold temperatures, hindering the engine's operations and impacting the vehicle's ability to start. This usually happens when temperatures fall below 10 to 15 degrees Fahrenheit or below -12 degrees Celsius.
To prevent this, you can store your vehicle in a climate-controlled garage. This will protect your vehicle from the cold and keep your diesel fuel from gelling. However, this method can increase your energy bills as you will need to use electricity to power lights, heaters, and block heaters.
Another option is to use a standalone heat unit, which can be added to any system. Ideally, you want to place it in the fuel line before the filters, as the problem often occurs when the fuel gels in the filter due to cold conditions. You can also add heaters to your lift pump if you have one.
Additionally, you can use a small 50w pan heater for the transmission, which can be tied in with the battery tender. Phillips & Temro makes thermostatically controlled stainless steel fuel heaters that use engine coolant to heat the fuel. If your truck will be sitting outside for a while, you can also use a solar panel to keep your batteries topped off during the day.
By storing your vehicle in a warm place, either through the use of a climate-controlled garage or various heating methods, you can effectively prevent diesel fuel gelling and ensure your vehicle remains operational during cold weather.
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Use fuel additives
Gelled diesel fuel is a common problem for many drivers during the winter season. It occurs when the paraffin in diesel solidifies due to a drop in temperature, causing the fuel to turn into a thick, sludgy gel that impedes the flow to the engine and clogs fuel lines and filters.
To fix gelled diesel fuel, one effective solution is to use fuel additives, which can break up existing gelled fuel and prevent further gelling. When selecting a fuel additive, it is important to choose a high-quality product specifically designed for diesel fuel, such as anti-gel or de-icer additives. These additives work by lowering the temperature at which the fuel solidifies, improving the cold-weather performance of your vehicle.
If your diesel fuel has already gelled, you can use an emergency additive or de-gel product, such as Hot Shot's Secret Diesel Winter Rescue or Opti-Lube Gel Melt. Carefully follow the instructions on the product and consult your vehicle's owner's manual to ensure safe and effective use. The general process involves adding the additive directly to the fuel tank and any affected fuel filters. For example, if using Diesel Winter Rescue, mix equal parts of the additive and diesel fuel, then fill the fuel filters with this mixture and reinstall them. Finally, start your engine and let it idle to warm up the fuel system and clear any remaining gelled fuel.
In addition to using fuel additives, it is important to take preventive measures to avoid gelled diesel fuel in the first place. This includes using winterized diesel blends, maintaining a full fuel tank, and regularly replacing fuel filters. Taking these steps can help ensure a smooth winter driving experience and reduce the need for emergency fixes.
By following the instructions for using fuel additives and adopting preventive measures, you can effectively address gelled diesel fuel and maintain the performance of your vehicle during cold weather conditions.
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Change the fuel filter
Changing the fuel filter is a crucial step in fixing gelled diesel fuel. Gelled diesel fuel is a common issue for drivers during the winter, caused by the paraffin in diesel solidifying due to low temperatures. This solidified paraffin can accumulate in the fuel filter, causing operational issues.
To address this, start by removing the fuel filter. If you have a metal housing fuel filter, consider purchasing an epoxy-on electric heat pad to warm the filter. Alternatively, use a hair dryer to blow warm air towards the fuel filter for about an hour, with the hood mostly down to retain the heat. This will help melt any solidified paraffin within the filter.
Once the filter is warm, carefully unscrew it and empty its contents. Some sources suggest applying a fuel additive, such as Diesel 911 or CleanBoost Sno-Cat, directly onto the filter element and housing at this stage. These additives can help dissolve any remaining wax and prevent further gelling.
After treating the filter, reinstall it securely. Start the engine and let it idle to warm up the fuel system. This process will help ensure that the gelled diesel fuel issue is resolved and that your vehicle operates smoothly.
While changing the fuel filter is an important step, it is also essential to address the gelled fuel in the tank. This can be done by using fuel additives, such as those mentioned above, or by blending the diesel with kerosene or winter fuel to prevent further gelling.
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Use kerosene
Kerosene is a common solution to prevent diesel fuel from gelling. It involves modifying the fuel mixture by mixing kerosene with diesel fuel to lower the freezing point. Kerosene has a lower gelling point than diesel fuel, which is why it is an effective solution.
If you are using kerosene to prevent diesel fuel gelling, it is important to note that it has some disadvantages, such as reduced fuel mileage and efficiency. To counter this, it is advisable to let the engine run long enough to combine the fuels properly and provide a steady flow of the mixture. For example, in a semi-truck, it may take an hour of idling for the kerosene to thaw the entire line from the fuel tank to the filter and the injectors.
You can also get kerosene-blended fuel, which often combines #1 diesel and #2 diesel. However, it is important to note that the availability of kerosene-blended fuel may vary depending on your location and the refiner. For example, in the colder northern states, refiners may provide a unique winter formula that helps prevent gelling, but in the southern states and Texas, you may need to add your own treatment.
While kerosene can be an effective solution to prevent diesel fuel gelling, it is always a good idea to have some winterizing additives or emergency products on hand. These additives can help melt frozen fuel filters, disperse water, and lower the pour and gel points, improving engine performance at lower temperatures.
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Frequently asked questions
There are a few telltale signs that your diesel fuel is starting to gel. This is primarily based on the loss of power and compression caused by fuel failing to reach the combustion chamber. Some signs include a cloudy fuel appearance, white smoke from the exhaust when trying to accelerate, and the engine stopping when you’re sitting idle trying to throttle.
There are several ways to fix gelled diesel fuel. One way is to carefully heat the filter with a heat gun or hair dryer. You can also add an anti-gel product or emergency winter product to the fuel tank. Additionally, you can try changing the fuel filter and filling it with treated diesel fuel or a fuel additive.
To prevent diesel fuel from gelling, you can keep it warm by storing your vehicle in a climate-controlled garage or using heaters. You can also change the fuel's properties by adding kerosene or fuel additives. Buying good quality diesel fuel and using a fuel additive can also help prevent gelling.
