Mercedes Mullins
There are a lot of misconceptions about whether a fuel line hose can be used for engine coolant. Some people claim that fuel line hoses are superior to coolant hoses and can withstand higher temperatures, while others argue that fuel line hoses will deteriorate over time when exposed to coolant. The truth is that it depends on the type of hose and the specific application. Some fuel line hoses may be suitable for use with coolant, but it is essential to consider factors such as temperature ratings, pressure ratings, and material compatibility to ensure that the hose can withstand the demands of the cooling system without failing.
Can I use a fuel line hose for an engine coolant hose?
| Characteristics | Values |
|---|---|
| Safety | Some sources say that fuel hose can be used for coolant in an emergency, but it is not recommended for long-term use due to the risk of the hose becoming brittle and breaking. |
| Temperature | Fuel hoses may not be suitable for the high temperatures of coolant systems. |
| Pressure | Fuel hoses may not be able to handle the pressure of a coolant system. |
| Compatibility | The materials used in fuel and coolant hoses may not be compatible with each other, leading to potential leaks and failures. |
| Cost | Fuel hoses tend to be more expensive than coolant hoses. |
| Availability | Coolant hoses may not be readily available for purchase, leading to the consideration of using fuel hoses as a substitute. |
| Ratings | SAE 30R7-rated hoses can be used with petroleum-based oil, fuel oil, gasoline, diesel fuel, grease, coolants, and antifreeze. |
| Material | Silicone hoses are suitable for high temperatures but are not rated for use with fuel, oil, or fuel vapors. |
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What You'll Learn
Fuel hose suitability for engine coolant
The suitability of a fuel hose for engine coolant depends on several factors, including the type of hose, the temperature, and the presence of other substances such as oil or fuel.
Some sources claim that fuel hose can be used for coolant, especially in the short term. For instance, one user reports that they have been using a 3/8" fuel line as a coolant line for 3 years without issue. Another user was advised by a knowledgeable worker at an industrial hose and fitting supply store that fuel line would be fine as it is rated for the heat range and resistant to most substances. Additionally, some John Deere hoses are marked with an SAE 30R7 rating, indicating they can be used with coolants and antifreeze.
However, other sources suggest that fuel hose is not suitable for coolant due to concerns about temperature and the potential presence of other substances. One user cautions that while fuel hose may be superior to coolant hose in terms of resistance to oil and fuel, it can become brittle and fail over time due to heat. Another user reports that their fuel hose completely failed and split open, resulting in a loss of coolant. This concern is echoed by a worker at a local parts store, who warns that glycol in the coolant could cause the fuel hose to deteriorate.
It is important to consider the specific application and the potential risks involved. While fuel hose may work in some cases, it is always best to consult with experts and follow manufacturer recommendations to ensure safety and avoid potential failures or damage.
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Engine coolant hose bursting
A burst coolant hose can cause significant damage to your vehicle’s engine and cooling system, leading to costly repairs. The coolant hose is an integral part of the cooling system, working in conjunction with other components such as the thermostat and water pump, to maintain optimal engine temperature and prevent overheating. When a coolant hose bursts, the engine can rapidly overheat, resulting in potential engine damage and a loss of engine performance and efficiency. Therefore, it is crucial to address this issue immediately and understand the causes, signs, and steps to repair a burst coolant hose.
One prevalent cause of coolant hose bursting is material degradation over time. Coolant hoses are constantly exposed to heat, chemicals, and other elements that can cause them to deteriorate. This includes the electrochemical degradation (ECD) caused by an electrical charge being carried through the coolant, resulting in micro-cracks and internal striations in the hose tube. Additionally, pressure fluctuations and extreme temperatures can contribute to hose failure, as rapid changes in pressure can weaken the hose and make it more prone to bursting.
To prevent a burst coolant hose, regular inspections and maintenance are crucial. It is important to visually inspect the hoses for any signs of wear or damage, such as cracks, leaks, or bulges. Checking the hose connections, inspecting the hose clamps for rust or corrosion, and ensuring the fittings are secure are all important steps in maintaining the integrity of the coolant hose. By identifying issues early on, you can avoid potential engine damage and ensure the optimal functioning of your vehicle's cooling system.
While some people suggest using a fuel line hose as a temporary fix for a burst coolant hose, opinions vary on its effectiveness and safety. Some sources claim that fuel hose will deteriorate when exposed to glycol, a common component in coolant. Additionally, the type of rubber used in fuel hoses may not be compatible with the alcohol-based compound ethylene glycol, which is found in some coolants. However, others argue that if a fuel line can withstand ethanol, it should be able to withstand ethylene glycol. It is recommended to check the rating of the fuel line hose; if it has a SAE 30R7 rating, it can be used with coolants and antifreeze.
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Fuel hose deterioration
High temperatures
One of the most obvious causes of fuel hose deterioration is the high temperatures generated in the engine bay. Prolonged exposure to high temperatures can cause the hose to become brittle and crack, leading to leaks and potential fires.
Aggressive additives in gasoline
In recent years, the "nasty aggressive stuff" being added to gasoline has been identified as a major contributor to fuel hose deterioration. These additives, such as MTBE and high levels of aromatics, can break down the materials used in fuel hoses, including rubber and braided hoses. This can lead to leaks and vapour smells, as reported by many vehicle owners.
Incompatible coolants
Using fuel hoses for coolant lines can also lead to deterioration. While some fuel hoses may be resistant to gasoline, they may not be compatible with coolants containing ethylene glycol or other alcohols. Alcohol can break down certain kinds of rubber, leading to gooey rubber circulating in the cooling system.
Pressure
The pressure of the coolant system is another concern when using fuel hoses. Some fuel hoses are not rated for coolant injection and may not be able to handle the pressure, leading to bursting.
Chemical compatibility
In addition to pressure, chemical compatibility is also a concern. Antifreeze, for example, may eat through certain types of fuel hoses, rendering them useless.
To prevent fuel hose deterioration, it is important to use the correct type of hose for the specific application and to regularly inspect your vehicle. Solid piping made from aluminium or copper may be a safer alternative to rubber or braided hoses, although it may be less flexible and more difficult to route.
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Hose pressure and temperature ratings
The pressure and temperature ratings of a hose are crucial factors to consider when selecting a hose for a specific application. Using the wrong type of hose can lead to catastrophic failure, resulting in unnecessary downtime, property damage, injury, and environmental consequences.
When selecting a hose, it is essential to determine the operating temperature of the application, considering both the internal temperature and external environment. Hoses are constructed differently, and these differences affect how they react to heat. Some variables include textile braid vs. wire braid, hardwall vs. softwall, and the presence or absence of a helical wire. The listed working pressure on a hose is typically based on normal operating conditions and temperatures (65–75°F or 21°C). As the temperature increases, the pressure rating of the hose assembly is affected inversely. This is because rubber and plastics become softer at higher temperatures. Therefore, it is crucial to refer to the hose manufacturer's temperature derating chart to determine the safe working pressure at elevated temperatures.
It is also important to understand the difference between dynamic and static pressure when discussing hose pressure ratings. Dynamic pressure involves fluctuations, temperature changes, and shocks/pulses, while static pressure is constant without pulses or temperature changes. The weakest point in a hydraulic system, such as the fittings, can set the pressure rating for the entire assembly. As a result, the assembly's working pressure rating is determined by the lowest-rated component. For example, if a 4,000 psi hose is attached to a 3,500 psi fitting, the assembly's working pressure is limited to 3,500 psi.
When selecting a hose for a specific application, it is crucial to consult with experts and refer to the manufacturer's specifications and charts to ensure that the hose can handle the required pressure and temperature conditions.
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Hose material compatibility
Fuel hoses are typically designed to withstand gasoline or diesel fuel and the associated temperatures and pressures. They are often made of materials such as nitrile, which is rated for hot coolant but can become brittle over time. Coolant hoses, on the other hand, are designed for the specific temperatures and pressures of the cooling system and are made of materials like EPDM, which can withstand temperatures up to 120-150°C.
One important factor to consider is the presence of glycol in the coolant. Glycol is an alcohol-based compound that can break down certain kinds of rubber. A fuel hose may deteriorate when exposed to glycol over time. Additionally, the temperature of the coolant can reach 200°F or higher, which may be beyond the temperature rating of a fuel hose.
However, some fuel hoses are rated for a wide range of fluids, including coolants. For example, the SAE 30R7 hose is compatible with petroleum-based oil, fuel oil, gasoline, diesel fuel, grease, coolants, and antifreeze. It is rated for temperatures up to 257°F and pressures up to 300 psi, making it suitable for coolant applications.
When considering hose material compatibility, it is important to consult the specifications and ratings of the specific hose in question. The temperature, pressure, and chemical compatibility ratings will help determine if a fuel line hose can be safely used for engine coolant. It is always recommended to use hoses for their intended purposes to ensure optimal performance and longevity.
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Frequently asked questions
It is not recommended to use a fuel line hose for an engine coolant hose. While it may work in the short term, over time the heat will make the fuel hose brittle and prone to failure.
You should use a hose that is specifically designed for engine coolant. It should be rated for the heat range and resistant to most chemicals. It should also have the correct diameter and pressure rating for your application.
Using the wrong type of hose for engine coolant can lead to leaks and hose failure. It is important to use the correct type of hose to avoid potential damage to your engine.
You can buy engine coolant hoses at most auto parts stores or online. It is important to check the specifications of the hose to ensure it is suitable for your application.
