Sylvie Willis
Using a fuel hose for coolant is a highly contested topic. Some people claim that it is perfectly fine to use a fuel hose for coolant, while others strongly advise against it. Those who support the idea believe that a fuel hose can withstand the temperature and pressure requirements of a coolant system. They argue that fuel hoses are often more expensive and made to endure gasoline, so they should be able to handle coolant. On the other hand, opponents of this practice warn of potential leaks, brittleness, and deterioration over time. They argue that coolant hoses are designed with specific materials, such as EPDM, to withstand high temperatures and that using a fuel hose could lead to catastrophic failures. Ultimately, while some people have used fuel hoses for coolant with short-term success, it is essential to consider the potential risks and seek advice from reliable sources before making a decision.
| Characteristics | Values |
|---|---|
| Compatibility | Fuel hose may not be compatible with high temperatures. |
| Heat resistance | Fuel hose may not be as heat resistant as coolant hose. |
| Durability | Fuel hose may become hard and brittle over time. |
| Pressure tolerance | Fuel injection hose has a higher pressure tolerance than standard fuel line. |
| Cost | Fuel line is more expensive than coolant hose. |
| Safety | Using fuel line for coolant may not be safe and could lead to catastrophic failures. |
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What You'll Learn
Fuel line vs. coolant line pressure ratings
While it is not recommended to use a fuel line as a coolant line, some people have done so in the past. The pressure tolerance of a fuel injection hose or a transmission hose should not be a concern. However, the compatibility of the heat and temperature tolerance should be considered. Coolant hoses are designed to withstand higher temperatures than fuel hoses, which may deteriorate over time when exposed to high temperatures.
Standard fuel lines have a maximum pressure rating of 50 lbs, while fuel injection hoses have a higher rating of around 180 lbs. The pressure rating of a regular fuel line is already 10 times more than what is typically needed for a coolant line. Therefore, a fuel line should be able to withstand the pressure required for a coolant line.
Coolant hoses are made with a different rubber compound, such as EPDM, which is more resistant to hot coolant. On the other hand, fuel lines are designed to endure gasoline or ethanol inside and may not be suitable for the high temperatures of the coolant system. Over time, the coolant's glycol can cause the fuel line to deteriorate and become brittle, leading to leaks.
While a fuel line can be used as a temporary solution in an emergency, it is not a long-term fix. It is always best to use the correct type of hose for the specific application to ensure optimal performance and longevity.
In conclusion, while a fuel line may have a sufficient pressure rating for a coolant line, it is not designed to withstand the high temperatures and chemicals present in the coolant system. Therefore, it is not advisable to use a fuel line as a coolant line in the long term.
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Fuel line's resistance to heat and temperature
Fuel lines are designed to withstand high temperatures, but their resistance to heat depends on their material composition. Standard rubber fuel lines, for example, have a temperature rating of around 50-70 psi, which translates to approximately -20 to 212 degrees Fahrenheit. This is sufficient for most automotive applications, where the fuel line needs to withstand high external temperatures from the engine and ambient air.
Silicone fuel lines offer even greater heat resistance, with a temperature rating of up to 450 degrees Fahrenheit. This makes them suitable for use near exhaust systems, although they cannot be used for fuel lines due to their lack of resistance to gasoline. Other materials used for fuel lines include Tygon, which has a heat resistance of up to 165 degrees Fahrenheit, and neoprene, which can withstand temperatures from -20 to 212 degrees Fahrenheit.
It is worth noting that while fuel lines are designed to withstand high temperatures, they may not be suitable for use as coolant hoses. Coolant hoses are typically made from a different rubber compound, such as EPDM, which is more resistant to the high temperatures and pressures of hot coolant. Using a fuel line as a coolant hose may result in leaks or deterioration over time due to the chemical composition of the coolant.
Additionally, fuel lines may become hard and brittle over time, especially when exposed to high temperatures. This can lead to leaks and require replacement. To mitigate this, fuel line insulation products, such as sleeves, wraps, and heat shields, can be used to protect fuel lines from heat damage and ensure optimal performance and safety. These products are designed to fortify fuel lines from heat sources and are available from various manufacturers, including DEI, Thermo Tec, Vibrant Performance, and JEGS.
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Suitability of fuel line material for coolant
The suitability of fuel line material for coolant is a highly debated topic, with varying opinions and experiences shared online. Some individuals claim that using a fuel hose as a coolant hose is perfectly fine, while others strongly advise against it. It is important to note that the compatibility of the fuel line with coolant depends on various factors, including the type of fuel line, the coolant, temperature, and pressure.
Standard fuel lines are typically rated for lower pressure compared to fuel injection hoses, which have a higher maximum pressure rating. It is crucial to consider the pressure requirements of the application before substituting a fuel line for a coolant hose. Additionally, the temperature resistance of the fuel line should be considered, as coolants can reach high temperatures. Coolant hoses are designed to withstand higher temperatures, typically made from EPDM rubber, which has a temperature resistance of 120-150°C.
One common concern is the compatibility of the fuel line material with the coolant. Coolants, such as ethylene glycol, are alcohol-based compounds that can break down certain types of rubber. While fuel lines are designed to withstand gasoline or diesel, they may not be compatible with the chemicals present in coolants. Some sources suggest that fuel lines can become brittle and prone to leaks over time due to exposure to coolant.
However, there are also accounts of individuals who have successfully used fuel lines as coolant hoses for extended periods without any issues. In these cases, the fuel line was rated for the heat range and resistant to most chemicals. It is worth noting that the compatibility of the fuel line with the coolant may depend on the specific type of fuel line and coolant being used.
When considering the suitability of a fuel line for coolant, it is essential to consult experts or reliable sources for advice. While fuel lines may work temporarily or in specific applications, it is always recommended to use parts designed for their intended purpose to ensure optimal performance and longevity. Substituting fuel lines for coolant hoses may void warranties or cause unforeseen issues, especially in high-pressure or high-temperature applications.
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Coolant line's resistance to suction
Coolant lines need to resist not only pressure but also suction. If a trans fluid hose isn't resistant to suction, it will collapse. The suction line is typically larger than the liquid line. The length of the coolant line is not a problem, but the biggest issue is the oil return from the vertical rise. Therefore, it is important that the suction line is small enough to have enough return velocity.
The three primary issues that drive line sizing are velocity, pressure drop, and refrigerant charge. When determining the size of suction lines, the line must be large enough to minimize pressure drop, which minimizes capacity loss, but small enough to keep velocities high enough to maintain oil return to the compressor. Liquid lines must be large enough to minimize pressure drop but small enough that the extra refrigerant they hold will not damage the compressor.
Charts have been developed to determine capacity loss at different equivalent lengths. For example, a 3-ton system with an equivalent line length of 50 feet will have a 7 percent capacity loss if 3/4-inch copper is used, but only a 2 percent loss with 7/8-inch copper. If the suction line is too small, the resistance to refrigerant flow (which is expressed as pressure drop) will reduce the capacity and efficiency of the equipment. The lower the suction pressure is when the gases return to the compressor, the less dense they are. The less dense the suction gases are when they enter the compressor cylinder, the less refrigerant volume it can pump per stroke, and less refrigerant means less capacity.
While some people have used fuel line in place of coolant hoses, there are differing opinions on whether this is advisable. Some people have reported that the fuel line has held up fine for a couple of years, while others have reported leaks and brittleness. It is recommended to use a coolant type hose for the longest service life as coolant hoses use a different rubber compound that is more resistant to hot coolant.
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Longevity of fuel line vs. coolant line
The longevity of fuel lines and coolant lines depends on several factors, and there are differing opinions on whether a fuel line can be used as a coolant line.
Longevity of Fuel Lines
Fuel lines typically last around 10-15 years, with some sources suggesting a maximum of 12-15 years for fill and vent lines, and a shorter lifespan for supply lines. However, factors such as exposure to ethanol, UV radiation, and engine heat can shorten their lifespan. Additionally, the type of fuel line and the conditions under which it is used can impact its longevity. For example, aftermarket fuel lines may have shorter lifespans than original equipment manufacturer (OEM) lines.
Longevity of Coolant Lines
The lifespan of coolant lines varies depending on the type of vehicle, age, use, and operating temperature. Some coolant hoses can last over 400,000 miles, while others may fail before reaching 200,000 miles. Coolant lines made of thick and robust materials can be more durable, and regular maintenance checks can help extend their lifespan. Coolant lines are designed to withstand high temperatures and are resistant to coolant chemicals, which can contribute to their longevity.
Fuel Line vs. Coolant Line
Some people have suggested that a fuel hose can be used as a coolant hose in an emergency, stating that it should work just as well, if not better, due to its ability to withstand high temperatures and resistance to gasoline. However, others argue that a fuel line may not be suitable for high temperatures and that it could deteriorate over time when exposed to coolant. Additionally, coolant lines are designed to withstand specific chemicals and temperatures to optimize engine performance and prevent overheating. Therefore, using a fuel line as a coolant line may not provide the same level of performance and protection.
In conclusion, while fuel lines and coolant lines share some similarities in their construction and function, they are designed for specific purposes. Using a fuel line as a coolant line may work in the short term, but it is not recommended as a long-term solution due to potential compatibility and performance issues. For optimal performance and longevity, it is best to use parts designed for their specific functions.
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Frequently asked questions
It is not recommended to use a fuel hose as a coolant hose. While some people have reported doing so without any issues, others have experienced leaks and brittleness over time. Fuel lines are designed to withstand gasoline, while coolant hoses are made of a different rubber compound that is more resistant to hot coolant.
Coolant hoses are typically made of EPDM, which can withstand temperatures up to 120-150 degrees Celsius. Fuel lines, on the other hand, may not be rated for such high temperatures. Additionally, alcohol-based coolants like ethylene glycol can break down certain kinds of rubber, potentially leading to leaks.
Yes, it is recommended to use a coolant hose or a fuel injection hose as a substitute. Coolant hoses are designed to resist both pressure and suction, while fuel lines may not have the same level of resistance. It is best to consult with a reputable auto parts store or a specialist in cooling systems to find the most suitable solution for your vehicle.
