How to make a Double Flare on a Brake Line
During brake line flaring, a flare is added to the end of the line to prevent brake fluid leaks and ensure the line remains secure under pressure. Brake lines require double flaring. Single Flares are only acceptable on low-pressure lines. Flaring widens the tubing end, preventing leaks or loosening.
In this tutorial, we go over how to create double flares on brake lines.
- Cut the brake line squarely, clean the inside of the tubing, and use a file to chamfer the edge.
- Slide the flare nut over the brake line.
- Insert the brake line in the hole that matches the diameter.
- Expose the pipe to match the thickness of the flare nut’s larger diameter.
- Tighten the clamp bar.
- Insert the flaring adapter into the brake line.
- Use the flare yoke to press down on the flaring adapter.
- Remove the flare adapter. Check for any cracks in the brake line.
- Use the tip of the flaring yoke (without an adapter) and tighten it to create a double flare.
- Remove the flaring yoke and check the flare. If there are cracks present, redo the flare.
Preparing the brake line before flaring it is critical. Otherwise, it may crack.
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We hope you found this guide helpful. Check out our other troubleshooting and repair guides for more help with your vehicle.
Can I use a single flare on brake lines?
Single flares are unacceptable for brake lines and tend to crack and leak quite easily.
