Ameer Randolph
There is some debate about whether a rubber fuel line can be used as a coolant line. Some people claim that fuel lines can be used as coolant lines with no issues, while others argue that the two are not interchangeable due to differences in pressure tolerance and compatibility with heat and temperature. Coolant hoses are designed to withstand high temperatures and typically use a different rubber compound, such as EPDM, which is more resistant to hot coolant. On the other hand, fuel lines are reinforced to handle higher pressure and may not be compatible with the heat generated by the coolant system. While some sources suggest that a fuel line can handle coolant at room temperature, it may not be suitable for temperatures above 200 degrees. Additionally, ethylene glycol, a common component in coolant, is an alcohol-based compound that can break down certain types of rubber. Therefore, it is essential to consider the specific materials and ratings of the fuel line before using it as a coolant line.
| Characteristics | Values |
|---|---|
| Compatibility with ethylene glycol | Ethylene glycol is an alcohol-based compound that can break down certain kinds of rubber. |
| Compatibility with fuel | Fuel lines are designed to withstand high external/ambient air temperatures. |
| Compatibility with oil | Oil-rated hoses can be used for coolant with no worries. |
| Compatibility with antifreeze | Antifreeze shouldn't hurt the rubber hose as it is also used in tires/tubes for ballast. |
| Temperature resistance | Silicone hose rating: 300F+ at low pressures. |
| Pressure resistance | Standard fuel line: 50 lbs. Fuel injection hose: 180 lbs. |
| Hose material | Coolant hoses are often made of 'plain' rubber and are usually not rated for high pressure. |
| Hose size | 3/8" is a common size for both fuel and coolant hoses. |
| Hose weight | Using a fuel injection hose can reduce weight. |
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What You'll Learn
- Fuel injection-rated rubber hoses can withstand high temperatures
- Coolant hoses have a membrane to control expansion due to high temperatures
- Ethylene glycol is an alcohol-based compound that can break down certain rubbers
- Fuel/oil-rated hoses are suitable for positive pressure but not suction
- Coolant hoses are usually made of a different rubber compound than fuel hoses
Fuel injection-rated rubber hoses can withstand high temperatures
Rubber fuel lines are designed to withstand high temperatures and pressures. They are commonly used in fuel injection systems, where they are exposed to harsh chemicals and high temperatures. The hoses are typically made from a combination of materials such as rubber, nylon, and stainless steel, which provide strength and durability.
The temperature and pressure ratings of a rubber fuel line can vary depending on its construction and materials. For example, a standard rubber fuel line is typically rated for 50-70 psi, while a fuel injection-rated hose can handle much higher pressures, up to 180 psi or more. In terms of temperature, a silicone hose can handle temperatures of 300°F and above at low pressures, while a PTFE hose can withstand extreme temperatures of 200°F.
It is important to note that the compatibility of the hose with the fluid it carries is also a critical factor. For instance, a rubber fuel line may be suitable for carrying coolant in some cases, as the coolant's temperature and pressure may be within the hose's ratings. However, the rubber material may not be compatible with the chemicals in the coolant, which could cause degradation over time. Therefore, it is always essential to use hoses specifically designed for the application to ensure optimal performance and safety.
When choosing a rubber fuel line for a specific application, it is crucial to consider the temperature and pressure ratings, as well as the compatibility of the hose with the fluid it will carry. Additionally, it is important to purchase hoses from reputable sources, as the quality and performance of the hose can vary significantly between different manufacturers and suppliers.
In summary, fuel injection-rated rubber hoses are designed to withstand high temperatures and pressures, making them suitable for use in demanding applications such as fuel injection systems. However, it is important to carefully select the appropriate hose for the specific application, taking into account factors such as temperature, pressure, and fluid compatibility, to ensure optimal performance and safety.
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Coolant hoses have a membrane to control expansion due to high temperatures
The cooling system of a car is made up of a maze of hoses that wind around the engine. These hoses are designed to withstand coolant under intense pressure, extreme temperatures, oils, dirt, and sludge. Coolant hoses are made from a different rubber compound that is more resistant to hot coolant than fuel and transmission hoses.
The membrane tank also plays a crucial role in maintaining the pressure in the engine cooling system during the winter. At low temperatures, the engine immediately cools, and the pressure in the system decreases. To ensure that the pressure does not drop too low, the inlet valve in the tank opens and sucks air into the system. This prevents the plastic container from shrinking into the shape of a tube and maintains the coolant level.
While rubber fuel lines are designed to withstand high external temperatures, they may not be specifically rated for coolant. Some people have used rubber fuel lines as coolant lines for a few years without issues. However, it is recommended to use hoses designed for coolant for the longest service life. Coolant hoses are made from a different rubber compound that is more resistant to hot coolant.
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Ethylene glycol is an alcohol-based compound that can break down certain rubbers
Ethylene glycol is an organic compound with the formula (CH2OH)2. It is a type of alcohol known as a vicinal diol. It is mainly used as a raw material in the manufacture of polyester fibres and in antifreeze formulations. Ethylene glycol is produced from ethylene (ethene) via the intermediate ethylene oxide. When mixed with water, ethylene glycol provides additional benefits to coolant and antifreeze solutions, such as preventing corrosion and acid degradation, as well as inhibiting the growth of most microbes and fungi.
Due to its chemical properties, ethylene glycol can break down certain types of rubber. This is why it is important to use the correct type of rubber fuel line when dealing with ethylene glycol-based coolants. Some rubber fuel lines are specifically designed to be resistant to ethylene glycol and other coolants. These fuel lines are typically made from a different rubber compound, such as EPDM, which offers better resistance to hot coolants.
It is worth noting that some people have used standard rubber fuel lines as coolant lines without any issues. However, it is generally recommended to use fuel lines that are specifically designed for coolant applications to ensure long-term compatibility and durability. The compatibility of a rubber fuel line with ethylene glycol-based coolant depends on various factors, including the type of rubber compound used, the operating temperature, and the concentration of ethylene glycol in the coolant.
In summary, ethylene glycol is an alcohol-based compound that can break down certain rubbers. When using ethylene glycol-based coolants, it is important to select a compatible rubber fuel line that is specifically designed for coolant applications. This will help ensure the integrity and longevity of the fuel line in the presence of ethylene glycol.
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Fuel/oil-rated hoses are suitable for positive pressure but not suction
The suitability of a fuel/oil-rated hose for positive pressure but not suction depends on several factors, including the type of fluid, temperature, and pressure involved.
Firstly, it is important to understand that fuel/oil-rated hoses are designed to withstand the specific chemicals and conditions associated with fuel and oil applications. They are typically made from rubber compounds that are resistant to common fuel and oil additives, as well as solvents. This makes them suitable for handling fuels such as gasoline and diesel, as well as petroleum-based oils.
However, when it comes to coolant, the situation is more complex. Coolant systems typically operate at higher temperatures than fuel or oil systems, and this can affect the performance of the hose. Coolant also contains chemicals, such as ethylene glycol, which is an alcohol-based compound. Alcohol can break down certain types of rubber, including some fuel/oil-rated hoses. Therefore, it is crucial to ensure that the hose is compatible with the specific coolant being used.
Additionally, the pressure and suction characteristics of the application need to be considered. Fuel/oil-rated hoses are generally designed to handle positive pressure and may not perform well under suction or vacuum conditions. Coolant hoses, on the other hand, are often reinforced to handle both pressure and suction, as well as to control the expansion of the hose due to high temperatures.
In some cases, individuals have reported successfully using fuel/oil-rated hoses as coolant lines for several years without issues. However, others have experienced problems, such as hardening or brittleness of the hose over time, leading to leaks or failures. Therefore, it is generally recommended to use hoses that are specifically designed for coolant applications, as they are constructed with materials that can withstand the unique demands of coolant systems, including temperature, pressure, and chemical compatibility.
When in doubt, it is always best to consult with a reputable hose and fitting supplier or refer to manufacturer recommendations to ensure the correct hose is selected for the specific application.
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Coolant hoses are usually made of a different rubber compound than fuel hoses
Fuel hoses, on the other hand, are designed to withstand high pressure and are reinforced to handle the pressure of fuel injection. They are made of a different rubber compound that is resistant to fuel, oil, and solvents. The specific compounds used in fuel hoses can vary, with some being made of silicone, which can also withstand high temperatures.
While some people have used fuel hoses as coolant hoses with no issues, others have reported that the fuel hose becomes hard and brittle after a couple of years. Additionally, there are concerns about the compatibility of the rubber in fuel hoses with the chemicals in coolant, such as ethylene glycol, which is an alcohol-based compound that can break down certain kinds of rubber.
To ensure the safest and most effective performance, it is recommended to use hoses that are specifically designed for their intended purpose. Coolant hoses are designed with specific materials and reinforcements to handle the unique demands of the cooling system, while fuel hoses are engineered to withstand the high pressure and chemical composition of fuel.
It is always best to consult with professionals or refer to manufacturer guidelines when selecting the appropriate hoses for your vehicle or equipment.
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Frequently asked questions
Yes, a rubber fuel line can be used as a coolant hose, but it is not ideal. Fuel lines are rated for higher pressure and are reinforced to withstand solvents and additives. Coolant hoses, on the other hand, are designed to control the expansion due to high temperatures and are made of a different rubber compound.
Yes, a rubber fuel line will likely be resistant to coolant in the short term. Coolant is fairly benign, and a fuel line should be able to withstand it, especially if it is rated for ethanol or ethylene glycol.
The main disadvantage of using a rubber fuel line for coolant is that it may not be rated for the same pressure as a coolant hose. Additionally, a rubber fuel line may become hard and brittle over time, and need to be replaced.
If you want to use a rubber fuel line for coolant, look for one with a SAE 30R7 rating. This type of hose can be used with petroleum-based oil, fuel oil, gasoline, diesel fuel, grease, coolants, and antifreeze.
You can buy a rubber fuel line that is suitable for use with coolant at industrial hose and fitting supply stores, or automotive spare part outlets. Some autoparts stores may also carry them, but you may have more luck at shop-oriented parts stores or independent places.
