Most vehicle use double bubble flare brake lines. The double flared line is positioned alongside a brake component (either the brake hoses on the slave cylinder, or the outlet fittings or master cylinder inlet). Flare refers to the brake line tubing’s end part, which is flared or opened to 45 degrees angle. Then the flare is folded above itself, making a double and secure flare. Producing double flare brake lines is a very challenging task. As it is possible to perform, most people eventually fail in productively making a constant double flare. It is because of the fact that creating a double flare requires precision. When the flare is not ideal, the line will ultimately suffer a catastrophic breakdown of the vehicle’s braking system, which could trigger serious damage or death to anyone in the vehicle. If you are going to try making a double flare, you will need a lot of patience and specialized equipment.
SEE ALSO:HOW TO REMOVE AIR FROM BRAKE LINES
PLACE THE TUBE NUT
Put a tube nut above the steel brake line’s end, such that the threaded end will face the brake line’s end that you will be working on. Ensure that the end portions of your brake lines are free from any burrs and are level and accurate. You may want to use a metal file and a tube cutter to attain this. Put the brake line’s end into your car’s line clamp, so the brake line glues out to the top portion of the clamp.
PREPARE THE BRAKE LINE ANVIL
Arrange the brake line anvil utilized to make double bubble flares along the clamp’s face. The anvil contains two sides. One side is raised, while the other side is flat that fits into the tubing’s center. Keep the anvil’s flat side alongside the clamp after the brake line. Regulate the uncovered length of the vehicle’s brake line. There’s a line along the anvil’s center which specifies how far the brake line’s end has to be uncovered. Again, alter the end of the brake line till it equals with the anvil’s line. Then tighten down the anvil, which is very vital. The brake line should not move when you tighten it already. Put the raised anvil’s end into the middle portion of your vehicle’s brake line.
MAKE DOUBLE BUBBLE FLARE
Finally, put the flaring tool above the clamp and anvil. The anvil holds a big screw along with a 45-degree angled bit along its end. Next, you will have to tighten the flaring tool so the line’s end bubbles out. Make it tighter until the anvil assembles flush next to the clamp. Take out the anvil and flaring tool afterwards. You will notice that the line has made a bubble. Then, if the line has shifted at all, you should re-do the line and start again.
Install the 45-degree flaring tool end alongside the tubing’s center then tighten again the flaring tool. As you carry this out, the double bubble will fold above itself, making the 45-degree double flare. Then, the flare should be absolutely square and accurate, and the completely centered for it to maintain in your vehicle’s brake system.