Quick summary
- Flaring the new brake lines is a crucial step in the replacement process, ensuring a leak-free and reliable brake system.
- Flaring is the process of expanding the end of a brake line to create a flared lip.
- Insert the flaring punch into the die and tighten the screw until it makes contact with the brake line.
Brake lines are essential components of any vehicle’s braking system, responsible for transferring hydraulic pressure from the master cylinder to the brake calipers. Over time, brake lines can become damaged or corroded, necessitating replacement. Flaring the new brake lines is a crucial step in the replacement process, ensuring a leak-free and reliable brake system. This comprehensive guide will provide you with a step-by-step tutorial on how to flare brake lines.
What is Flaring?
Flaring is the process of expanding the end of a brake line to create a flared lip. This lip provides a surface for the brake fitting to seal against, preventing leaks.
Tools and Materials Required
- Brake line flaring tool
- Brake lines
- Brake fluid
- Rags
- Safety glasses
Step-by-Step Flaring Instructions
1. Cut the Brake Line: Measure and cut the brake line to the desired length using a sharp tubing cutter.
2. Clean the Brake Line End: Use a wire brush or sandpaper to remove any burrs or debris from the cut end of the brake line.
3. Insert the Brake Line into the Tool: Insert the brake line into the flaring tool until it reaches the stop.
4. Select the Correct Die Size: Choose the appropriate die size for the diameter of the brake line you are flaring.
5. Tighten the Die: Hand-tighten the die onto the brake line until it is snug.
6. Insert the Flaring Punch: Insert the flaring punch into the die and tighten the screw until it makes contact with the brake line.
7. Flare the Line: Slowly and evenly tighten the screw while holding the flaring tool steady. You will feel resistance as the brake line expands.
8. Inspect the Flare: Once the flare is complete, remove the brake line from the tool and inspect it. The flare should be smooth and uniform, with no cracks or imperfections.
Tips for Flaring Brake Lines
- Use a sharp tubing cutter to ensure a clean cut.
- Clean the brake line end thoroughly to prevent leaks.
- Select the correct die size for the brake line diameter.
- Tighten the flaring punch gradually to avoid over-flaring.
- Inspect the flare carefully before installing it.
Troubleshooting Flaring Issues
Problem: Brake line leaks after flaring.
Solution: Check the flare for cracks or imperfections. Tighten the brake fitting or replace the flare.
Problem: Brake line becomes kinked or damaged during flaring.
Solution: Use a flaring tool with a support sleeve to prevent kinking. Be careful not to over-tighten the flaring punch.
Problem: Flare is not smooth or uniform.
Solution: Clean the die and flaring punch. Select the correct die size for the brake line diameter. Tighten the flaring punch gradually.
The Bottom Line
Flaring brake lines is a straightforward process that can be performed with the right tools and techniques. By following the steps outlined in this guide, you can ensure that your brake lines are properly flared, resulting in a reliable and leak-free braking system.
Basics You Wanted To Know
Q: Can I flare brake lines with a hammer and chisel?
A: While it is possible to flare brake lines using a hammer and chisel, it is not recommended. This method can damage the brake line or result in an uneven flare.
Q: How often should I flare brake lines?
A: Brake lines should be flared whenever they are replaced or cut.
Q: What type of brake fluid should I use?
A: Use the type of brake fluid specified in your vehicle’s owner’s manual.