Mercedes Mullins
When it comes to performing a brake flush, ensuring you have the correct fuel line size is crucial. Using the wrong size or type of hose can lead to leaks and costly repairs. The most common fuel line sizes for brake flushes are 3/16 and 3/8, with the choice depending on factors such as budget and vehicle specifications. It's important to note that using a fuel hose for brake fluid is not recommended, as brake fluid can seep through and deteriorate the hose over time.
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What You'll Learn
Fuel and brake lines require different hoses
Brake lines carry brake fluid, which is crucial for the effective operation of a vehicle's braking system. Over time, brake fluid can seep through a fuel hose, so it is essential to use a hose designed specifically for brake fluid. This type of hose is typically made of materials such as stainless steel or rubber, and it needs to withstand the pressure and demands of the braking system.
Fuel lines, on the other hand, are designed to carry fuel from the tank to the engine. They need to be compatible with the type of fuel used, whether it is petrol or diesel. Fuel lines are usually made of materials like rubber, nylon, or steel. It is important to note that fuel lines should not be used for brake fluid and vice versa.
The size of the hoses is another differentiating factor. Brake lines typically use a 3/16" hose, while fuel lines commonly use a larger 3/8" hose. However, it's important to consult the vehicle's specifications and manufacturer recommendations to determine the exact sizes required for a particular application.
Additionally, the fittings and connections for fuel and brake lines can vary. Fuel lines often use fittings like NPT taper or straight threads, while brake lines may require different adapters and connections. Proper flaring tools and techniques are also critical to ensuring secure and leak-free connections.
In summary, it is essential to use the correct hoses, fittings, and installation techniques for fuel and brake lines. Consulting experts, such as those at Jeff Lilly Restorations, can provide valuable guidance on proper installation, ensuring the safety and optimal performance of your vehicle.
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Using a 37-degree flaring tool for stainless lines
When it comes to brake and fuel lines, it's important to ensure the use of correct materials and tools to prevent leaks and damage. While the hose for a fuel line may appear similar to a braided brake line, it is important to note that they are not the same. Using the wrong hose can result in brake fluid leaking through and deteriorating the rubber from the inside. Therefore, it is crucial to use the correct hose for each application.
Now, let's discuss the use of a 37-degree flaring tool for stainless lines. Flaring seamless stainless tubing can be challenging, and the right tools can make a significant difference. The 37-degree flaring tool is specifically designed for stainless steel, copper, brass, and aluminum tubing. It features a ratcheting feed screw with a hardened flaring cone, supported by needle bearings, to create precise and
The ergonomic design of the feed screw handle enhances user comfort and efficiency during the flaring process. Additionally, the 37-degree flaring tool is built with high-quality materials and a robust design, ensuring long-lasting reliability in both professional and DIY environments. When using the tool, it's important to follow the correct procedure for a double flare. This involves two operations: first, you create a bubble, and second, you push half of that bubble back inside itself.
For those seeking recommendations, the Mastercool hydraulic flaring tool is a popular choice, offering precision and ease of use. Another option is the Imperial unit for AN lines, which is commonly used for 37-degree flares on stainless brake lines. It features a roller tip that prevents marring on the stainless surface. Additionally, the #11535 hydraulic flare tool from East wood is suitable when you need to flare a line without removing all the holding clamps, as it can form a perfect flare directly on the vehicle. It is slender and manoeuvrable, making it convenient for tight spaces.
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The cost of stainless lines
The cost of stainless steel brake lines is a key consideration when deciding whether to upgrade from rubber brake lines. While stainless steel brake lines offer enhanced durability, heat resistance, and improved pedal feel, they typically come with a higher upfront cost compared to rubber brake lines.
Rubber brake lines, which are commonly used in factory settings, are known for their durability, resilience, and cost-effectiveness. They satisfy the braking requirements for most drivers under normal conditions and are less expensive to replace. However, they are prone to dry rotting and expansion under pressure, which can result in a spongy or squishy pedal feel over time.
On the other hand, stainless steel brake lines are significantly stronger and more durable than rubber. They resist expansion under pressure, providing consistent pressure transmission and a more responsive braking system. This increased strength and durability come at a higher price. Stainless steel brake lines may require more maintenance due to the potential for small dust and dirt particles to get between the braiding and the hydraulic line, causing wear and leaks over time.
The cost of stainless steel brake lines can vary depending on the vehicle, the specific product, and the retailer. For example, a quick search on Amazon reveals prices ranging from $72.30 for a stainless steel brake line to more expensive options, depending on the specific application and vehicle.
When deciding whether to upgrade to stainless steel brake lines, it's important to consider your specific needs, driving conditions, and budget. While stainless steel lines offer long-term benefits and potential cost savings due to their extended lifespan, the higher initial investment may not be justifiable for everyone. It's essential to weigh the benefits against the functional adequacy of rubber brake lines to make an informed decision.
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Neoprene Type A is ideal for brake fluid
When it comes to flushing your brakes, it is important to use the correct tools and materials. One of the most important considerations is the type of fuel line you use. While the size of the fuel line is a factor, the material it is made of is equally crucial.
Brake fluid can be highly corrosive to certain materials, and using the wrong type of hose can lead to leaks and costly repairs. For this reason, it is generally recommended to use a hose that is specifically designed for brake fluid applications.
Neoprene Type A hose is an ideal solution for brake fluid systems. This type of hose is made of synthetic rubber, which has excellent mechanical properties, including the ability to return to its original shape after compression. This feature is important for ensuring a tight seal and preventing leaks. Additionally, Neoprene Type A hose has good heat resistance, with an effective temperature range of -30°C to 120°C, making it suitable for most automotive applications.
In contrast, other types of rubber, such as Nitrile or NBR, should be avoided. While Nitrile rubber has excellent resistance to oils, greases, and hydrocarbons, it is not compatible with brake fluid. Exposure to brake fluid will cause the Nitrile rubber to dissolve, leading to leaks and potential damage to your brake system. Therefore, it is important to use the correct type of hose, such as Neoprene Type A, to ensure the integrity and safety of your brake system.
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Using a hydraulic flare tool
When it comes to servicing the brake and fuel system of a car, rarely does it involve fabricating a new fuel or brake line. However, when building a street rod or upgrading the brake system, creating custom-bent and terminated hard lines for the brake and fuel systems become necessary. This is where a hydraulic flare tool comes in.
A hydraulic flare tool is used to create flares in brake and fuel lines. Flares are necessary to ensure a strong seal and prevent leaks. The most common type of flare is the 45-degree inverted flare, which is an SAE (Society of Automotive Engineers) standard. This type of flare has a two-step process, creating a double-walled flare seat. It is important to note that automotive flares typically have a 45-degree angle, while AN or Army/Navy flares have a 37-degree angle. These cannot be intermixed, as they will leak if the caliper or wheel cylinder is not compatible.
The Universal Hydraulic Flaring Tool is a popular option for creating flares, as it can be used for a variety of applications, including fuel, A/C, and brake lines. It is important to follow the correct process when using a hydraulic flare tool. First, cut the line to the desired length and bend it to match the template. Then, place the inverted flare fitting or tube nut and tube sleeve over the cut end of the line in the proper direction. This step is crucial to ensure that the fitting is not left off the end of the line after creating the flare.
When using a hydraulic flare tool, such as the #11535 from East Wood, it is important to align the tube flush with the die. Pump the handle to set the die and plunger die until it becomes difficult to squeeze. At this point, the tube is aligned, and the release knob can be turned to open and retract the plunger. The next steps will depend on the desired flare shape. For a double flare, use the flare labelled with the imperial measurements of the tubing's outer diameter. Other flare shapes will have corresponding dies labelled with details such as ISO, CONNECT, and GM FUEL. Once the new die is loaded, close the hydraulic handle and pump until the lever becomes difficult to actuate again.
It is important to note that there may be potential problems when using a hydraulic flare tool, such as off-center flares, slipping die sets, or tubing getting stuck inside the die. These issues can often be resolved by ensuring straight tubing, torquing the clamping screw properly, and sizing the tubing to specifications.
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Frequently asked questions
The size of the fuel line depends on the make and model of your car. For a 1972 Datsun 510, a 6AN (6/16" = 3/8" tubing) is recommended. For a 1973 Datsun 510, a 3/8" OD fuel line is recommended.
You will need a flaring tool, such as a #11535 hydraulic flare tool from East Wood, and a tube bender. A 37-degree flaring tool and a standard brake line tool can also be used for a 3/16" line.
You should use a hose that is compatible with brake fluid. Neoprene Type A is ideal, but Nitrile will dissolve with brake fluid. Do not use a fuel hose, as brake fluid will seep through it over time.
Yes, it is important to use the correct tools and fittings for your specific application. Using improper tools or fittings can damage your car's brake system.
