Regan Brown
There are differing opinions on whether rubber fuel lines can be used for coolant. Some people claim that fuel lines are more durable and have better pressure strength than coolant hoses, making them a suitable alternative. However, others argue that the heat from the coolant will eventually cause the fuel hose to become brittle and fail. Additionally, the presence of ethylene glycol, an alcohol-based compound, in the coolant can break down certain kinds of rubber, leading to potential leaks. While some sources suggest using a silicone hose that is compatible with both fuel and coolant, others recommend purchasing a hose specifically designed for coolant to ensure the longest service life and avoid potential issues.
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What You'll Learn
Fuel hoses have better durability and pressure strength
While rubber fuel lines are a popular choice for many fuel systems due to their low cost and ease of installation, they have a limited lifespan and are not suitable for permanent use.
Fuel hoses, on the other hand, are designed to withstand the harsh conditions of modern fuels and offer superior durability and pressure strength. For example, the UltraPro Series from Earl's Plumbing is designed for racing and can withstand harsh environments, including vibration. The UltraPro hose has an ultra-low coefficient of friction for maximum flow, and its outer liner is reinforced with a glass-fibre wrap for additional strength and integrity.
Another example is the Aeroquip 666/667 hose, which can hold up to any type of fuel and is a much better choice than any rubber hose. It has a fluoroplastic inner liner, which makes it resistant to fuel and ozone. The braiding on the hose adds burst strength and resistance to fatigue failures.
Nylon fuel hoses are also a good option, offering resistance to most fuel types, an operating pressure of 250 psi, and a burst pressure of up to 1000 psi. They are available in both rigid and flexible convoluted tubes, with the latter being well-suited for in-tank use due to its flexibility and resistance to submersion in fuel.
PTFE, or Teflon, is another excellent choice for fuel hoses. It is compatible with all fuels and oils, has an operating pressure of 1200+ psi, and a burst pressure of 4000+ psi. It is also very flexible and can be easily installed.
In conclusion, while rubber fuel lines may be tempting due to their low cost and ease of installation, fuel hoses offer superior durability and pressure strength, making them a more reliable and safer choice for your vehicle.
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Alcohol-based compounds can break down certain kinds of rubber
Using a rubber fuel line for coolant is not advisable. While it may be tempting to use a rubber fuel line for coolant, especially when it is all you have available, it is important to understand the potential risks involved. Alcohol-based compounds, such as ethylene glycol, can break down certain kinds of rubber, leading to serious issues in your vehicle's fuel system.
The compatibility of rubber with alcohol depends on the specific type of rubber. Some rubbers, like nitrile and neoprene, can withstand exposure to methyl and ethyl alcohols without significant degradation. On the other hand, natural rubber and some synthetic rubbers are more susceptible to the damaging effects of alcohol. Prolonged exposure to alcohol can cause these rubbers to lose their elasticity, becoming brittle and prone to cracking.
In a vehicle's fuel system, the rubber components, such as o-rings and gaskets, play a critical role in maintaining a tight seal. If these parts are made of a rubber that is not compatible with alcohol-based compounds, the rubber can break down over time. This can lead to leaks, reduced performance, and even catastrophic failures in extreme cases. Therefore, it is crucial to use the correct type of rubber that can withstand the specific chemicals it will be exposed to.
When it comes to coolant systems, EPDM (ethylene propylene diene monomer) rubber is commonly used due to its durability and resistance to high temperatures and various chemicals, including coolants and antifreeze. This type of rubber is specifically designed to withstand the harsh conditions and chemicals present in a coolant system, ensuring reliable performance and preventing leaks.
While some individuals have reported using a rubber fuel line for coolant in the short term without major issues, it is not worth risking the potential consequences. It is always best to use the appropriate type of hose for the specific application, especially when it comes to critical systems like fuel and coolant lines in your vehicle. By choosing the right rubber compound for the job, you can avoid costly repairs and maintain the safety and reliability of your vehicle's systems.
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Silicone hoses can be used for both fuel and coolant
Silicone hoses are a versatile solution for transferring liquids in various applications, including fuel and coolant systems. They are durable, flexible, and reliable, making them suitable for both fuel and coolant lines.
Silicone hoses offer superior performance compared to traditional rubber hoses due to their ability to withstand extreme temperatures and their resistance to heat. They are designed to handle high-temperature fluids, making them an ideal choice for automotive cooling systems. The flexibility of silicone hoses also ensures a tight fit when fitting over outlets, reducing the risk of leaks and other issues associated with traditional rubber hoses.
Additionally, silicone hoses have a longer lifespan than rubber hoses as they are more resistant to splitting and hardening. Their superior physical and chemical properties make them a preferred choice in various industries, including automotive, medical, food, construction, and pharmaceuticals.
When using silicone hoses for fuel or coolant lines, it is important to ensure a proper fit by matching the hose to the outlet size. Pre-formed shapes, such as elbows and reductions, are typically recommended to achieve the desired configuration without compromising the integrity of the hose.
Silicone hoses, with their high-quality silicone construction, offer a reliable and durable solution for both fuel and coolant applications, providing peace of mind and ensuring the smooth operation of your systems.
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Fuel injection-rated hoses are better than coolant-rated hoses
When it comes to choosing the right hose for your vehicle, it's essential to consider the specific requirements of the application. While rubber fuel lines may be suitable for some purposes, they may not always be the best choice for coolant systems. Here's why fuel injection-rated hoses are often a better option than coolant-rated hoses:
Higher Pressure Tolerance:
Fuel injection-rated hoses, also known as FI hoses, are designed to withstand significantly higher pressure than standard fuel lines. For example, a typical standard fuel line may be rated for up to 50 PSI, while an FI hose can handle up to 180 PSI. This makes FI hoses a better choice for applications where high pressure is a factor, such as in automotive fuel injection systems.
Compatibility with Modern Fuels:
The introduction of ethanol-laced fuels has posed a challenge for older fuel hoses. Many fuel hoses sold at auto parts stores are rated for older, non-ethanol fuels and are not compatible with modern ethanol-blended fuels. On the other hand, fuel injection-rated hoses are designed to work with all types of fuels, including ethanol, gasoline, diesel, and various fuel oils. This compatibility ensures that your hose won't break down prematurely due to the type of fuel it carries.
Temperature Resistance:
Coolant systems operate at high temperatures, and choosing a hose that can withstand these temperatures is crucial. While standard rubber fuel lines may become hard and brittle over time due to heat exposure, fuel injection-rated hoses are often made with different rubber compounds that offer better temperature resistance. This helps prevent premature failure and ensures the hose can handle the heat generated by the engine and coolant system.
Longevity and Reliability:
The choice of hose can significantly impact the longevity and reliability of your vehicle's systems. Coolant-rated hoses are designed specifically for coolant applications and may offer longer service life in those specific systems. However, fuel injection-rated hoses are built to withstand a wider range of chemicals and conditions, making them versatile and reliable across various automotive applications.
Safety:
The safety implications of hose failure cannot be overstated. A leaking or burst hose can lead to dangerous situations, including fires. By choosing a fuel injection-rated hose, you benefit from its higher pressure and temperature tolerance, reducing the risk of sudden hose failure. This added safety margin can provide peace of mind, especially when compared to hoses that may not be designed for such demanding conditions.
In conclusion, while coolant-rated hoses have their purpose, fuel injection-rated hoses offer distinct advantages in terms of pressure tolerance, fuel compatibility, temperature resistance, reliability, and safety. It's important to consult with knowledgeable sources and select the appropriate hose for your specific application to ensure optimal performance and longevity.
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Coolant hoses have to resist pressure and suction
Coolant hoses have to withstand high temperatures and pressure and be chemically resistant to coolants and additives. The coolant system operates at high temperatures, and the hoses have to be able to withstand the pressure generated by the system. At ambient temperatures, the hoses are not pressurised, but once the engine is running, the pressure increases. The cap on the tank will vent excess pressure above a certain level (e.g., 15 psi) to prevent over-pressurisation.
Coolant hoses must be able to withstand this pressure without bursting or leaking. They also need to be chemically resistant to the coolant and any additives, such as ethylene glycol, an alcohol-based compound. Alcohol can break down certain kinds of rubber, so the hose material must be compatible with the coolant.
The inner layer of the hose must also be resistant to abrasion caused by friction from solid material transport. This is especially important for coolant hoses, as they may need to transport solid particles, such as sand or dirt, that are present in the coolant.
Some hoses are designed with a thicker wall to offer higher pressure handling and resistance to cracking and leaks. The material used for the hose is critical; polyurethane (PU) hoses, for example, have greater elasticity and abrasion resistance than PVC and can operate at higher temperatures. PU hoses also have a wider range of applications due to their versatility with temperatures and flexibility.
It is important to choose a hose that is specifically designed for coolant applications and can withstand the temperatures, pressures, and chemicals present in the coolant system. Using a hose that is not rated for coolant can lead to premature failure and potential damage to the system.
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Frequently asked questions
It is not recommended to use rubber fuel lines for coolant. While some people have used rubber fuel lines for coolant in the past, the heat will eventually make the rubber hard and brittle, causing it to fail.
Coolant hoses are made from a different rubber compound that is more resistant to hot coolant than fuel lines. Coolant hoses are typically made from EPDM, which is suitable for temperatures up to 150°C.
Fuel lines are typically made from NBR (nitrile), which can withstand hot coolant, but will eventually become brittle and fail.
Yes, silicone hoses can be used for both fuel and coolant. It is important to check the ratings of the hose to ensure it is suitable for your specific application.
