Sylvie Willis
Diesel fuel is created with paraffin, a type of wax that freezes at low temperatures. This can cause the fuel to gel and thicken, clogging fuel filters and rendering a vehicle inoperable. This is a common issue for truck drivers, especially in winter, and can be costly to fix. However, there are several ways to unfreeze diesel fuel and prevent it from gelling. One way is to use heated storage or a garage to keep the fuel from freezing. Another is to add fuel additives or anti-gels to the diesel, which can prevent the paraffin from bonding and thickening. In an emergency, products like CleanBoost® Diesel Rescue Emergency De-Gel™ can instantly liquefy gelled diesel fuel. Other methods include using a blowtorch to heat fuel lines and glow plugs, or using a separate fuel supply like diesel purge. Preventative measures include using fuel stations that provide 'winterized' diesel blends, or adding fuel additives with anti-gelling properties.
How to Unfreeze Diesel Fuel
| Characteristics | Values |
|---|---|
| Why does diesel freeze? | Diesel fuels are created with paraffin, a type of wax. When temperatures drop, the compounds in paraffin cause it to solidify. |
| Gelling temperature points | Cloud point: around 0°C, when paraffin wax starts to precipitate, resulting in a cloudy appearance. Gel point: 10°C or lower, when diesel has too much wax for fuel to flow through the engine effectively. |
| Preventative measures | Use heated storage, such as a garage. Use fuel additives like special treatments or kerosene, which prevent paraffin additives from bonding and lower the temperature at which fuel solidifies. |
| Emergency measures | Use CleanBoost® Diesel Rescue Emergency De-Gel™ to instantly re-liquefy gelled diesel fuel and thaw fuel filters. Warm up the fuel system by moving the vehicle to a warmer place or using engine block heaters. |
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What You'll Learn
Move the vehicle to a warmer place or use heated storage
If your diesel vehicle is struggling to start during the winter, gelled fuel may be the problem. Gelling occurs at two major temperature points. The first is the cloud point, during which the paraffin wax in diesel starts to precipitate, resulting in a cloudy appearance. This usually happens around zero degrees Celsius. The second stage is the gel point, during which there is so much wax in the diesel that the fuel can no longer flow effectively through the engine. This happens when temperatures drop to negative 10 degrees Celsius or lower.
One way to resolve this issue is to move your vehicle to a warmer place or use heated storage. This could involve pushing the vehicle into a garage and surrounding it with electric heaters. Alternatively, you could use a small canister propane heater or a battery-powered heat gun to warm up the fuel tank.
If you have access to a garage, this can prevent diesel fuel from freezing. Truck drivers who leave their vehicles out in the cold usually experience frozen diesel more frequently than those who use heated storage.
In addition to moving your vehicle to a warmer place or using heated storage, there are other methods to unfreeze diesel fuel. For example, you can use fuel additives or anti-gels, such as CleanBoost® Diesel Rescue Emergency De-Gel™, to liquefy the gelled diesel and prevent it from freezing again. These additives can also provide other benefits, such as ignition improvements and removing harmful deposits from fuel injectors. It is important to choose high-quality additives specifically designed for diesel fuel.
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Use an anti-gel additive to dissolve the gel
To unfreeze diesel fuel, you can use an anti-gel additive. Anti-gel additives are easy to use – simply top off your fuel tank with the treatment. They work by lowering the freezing point of diesel fuel, making it less likely to freeze in cold temperatures. The additive also lowers the Cold Filter Plugging Point (CFPP), which is the lowest temperature at which fuel will still flow through a specific filter. This prevents the fuel from crystallizing and blocking engine fuel filters.
There are a variety of anti-gel additives available on the market, such as Fuel Ox™ Cold Charge and Valtec Industries' Diesel Fuel Anti-Gel Concentrated Fuel Additive. These products are designed to reduce the pour point of the fuel, keeping it flowing to engines and boilers in cold weather. They also modify the shape and structure of wax crystals as they form in the cold oil, preventing the clogging of lines and filters.
It is important to note that anti-gel additives are preventative measures and may not be effective if your fuel is already gelled. In this case, you may need to use an emergency de-gel product, such as CleanBoost® Diesel Rescue Emergency De-Gel™. However, these products can contain high concentrations of alcohol, which can have negative effects on diesel injection systems and other components.
When using an anti-gel additive, it is important to follow the instructions on the bottle and add the correct amount for your fuel volume. The general rule of thumb is that lower temperatures require a higher proportion of additive. By preparing your fuel with an anti-gel additive, you can help prevent the issues caused by gelled diesel fuel and keep your vehicle running smoothly during cold weather.
In addition to using anti-gel additives, there are other measures you can take to prevent diesel fuel from gelling. Storing your vehicle in a garage or using heated storage can help prevent gelling. Regular use of a product like CleanBoost® Sno-Cat™ after using an anti-gel can also help prevent future gelling.
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Use a de-gel product to transform gelled fuel into liquid fuel
Diesel fuel is created with paraffin, a type of wax. When temperatures drop, the compounds in paraffin cause it to solidify, and the diesel thickens and gels. This can clog your truck's fuel system, preventing the engine from getting fuel and causing it to overheat.
One way to resolve this issue is to use a de-gel product to transform gelled fuel into liquid fuel. De-gel products are designed to melt the gelled fuel and remove water from the fuel system. CleanBoost® Diesel Rescue Emergency De-Gel™ is one such product that can be used to liquefy gelled diesel fuel. It is important to differentiate between de-gel and anti-gel products, as the latter is ineffective on already-gelled diesel.
To use a de-gel product, follow these steps:
- Remove the fuel filters.
- Fill the filters with a mixture of de-gel formula and diesel fuel. The ratio may vary depending on the product and tank size, so refer to the instructions. For example, a mixture of 50% diesel winter rescue and 50% diesel fuel is recommended by some sources.
- Reinstall the fuel filters.
- Start the engine.
It is also recommended to use a product like CleanBoost® Sno-Cat™ regularly to prevent future gelling.
In addition to de-gel products, there are other ways to prevent and resolve diesel gelling. Using a heated garage or storage can help prevent diesel fuel from gelling. Fuel additives, such as special treatments or kerosene, can also be mixed into diesel fuel to prevent the paraffin from bonding and freezing. High-quality cold-weather diesel additives can lower the pour and gel points, allowing the engine to perform better at lower temperatures.
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Use a blowtorch to heat up fuel lines and glow plugs
Using a blowtorch to heat up fuel lines and glow plugs is one way to unfreeze diesel fuel. Diesel fuel is created with paraffin, a type of wax, which freezes and thickens in cold temperatures. Gelling occurs at two major temperature points. The first is the cloud point, during which the diesel takes on a cloudy appearance, and the second is the gel point, where the diesel has so much wax that it can no longer flow through the engine.
If you are experiencing frozen diesel fuel, you can use a blowtorch to heat up the fuel lines and glow plugs. It is important to avoid any wiring or ancillaries when doing this. You can also use a hair dryer to blow warm air into the air inlet of a diesel motor, which will help it start in cold weather. Burning a newspaper underneath the engine can also help to gently warm it up.
Glow plugs are an important part of the diesel engine setup, especially in cold weather. They are a kind of immersion heater that pre-heats the intake air in the combustion chamber, which helps the engine start. Kai Wilschrei, Manager of Technical Services Aftermarket EMEA at NGK Spark Plug, explains that "when you have a diesel car these days, you need to appreciate how much it relies on fully working glow plugs." In normal temperatures, ambient air is drawn into the engine cylinders and compressed, but in winter, the cold cylinder walls, pistons, and valves prevent air compression from achieving the necessary combustion temperature. Therefore, glow plugs are necessary to add extra heat.
If you are experiencing frozen diesel fuel, using a blowtorch to heat up the fuel lines and glow plugs may be an effective solution. However, it is important to exercise caution when working with a blowtorch and to avoid any wiring or ancillaries. Additionally, it is recommended to have a fully charged battery when trying to start a diesel engine in cold weather.
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Use a fuel additive to prevent paraffin from bonding
Diesel fuel contains paraffin, a type of wax. When temperatures drop, the compounds in paraffin cause it to solidify, and the diesel thickens and gels. This can block up the fuel filters and tank, and prevent the engine from starting.
To prevent this, a fuel additive can be used to stop the paraffin from bonding together and freezing. Fuel additives are compounds that are added to a fuel tank after it has been filled up. They are a cost-effective and easy DIY remedy. Additives can prevent the paraffin from bonding and stop freezing from happening. Many also offer a wide range of winter weather benefits, such as ignition improvements and the removal of harmful deposits from fuel injectors.
There are several types of fuel additives that can be used to prevent paraffin from bonding. Anti-gel additives can lower the fuel's gelling point and improve the diesel engine's efficiency in cold weather. Cetane boosters improve combustion and power, and fuel stabilisers stop the degradation of fuel and protect engine components from rust. Octane boosters are liquid additives that help fuel withstand higher pressures and temperatures, and products like CleanBoost® EMT™ (Engine Metal Treatment) have been found to reduce friction and extend engine life.
It is important to ensure that any additive is compatible with your vehicle.
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Frequently asked questions
There are several ways to unfreeze diesel fuel. One way is to use heated storage so that the fuel can thaw out. Another way is to use a fuel additive, such as kerosene, which can be mixed into the diesel to prevent the paraffin additives from bonding together.
Some signs that your diesel fuel is starting to gel include a cloudy fuel appearance, white smoke coming from the exhaust when trying to accelerate, and the engine stopping when idle.
To prevent diesel fuel from gelling, you can use fuel additives with anti-gelling properties, keep the fuel in a warm place, or use engine block heaters.
