How to Join a Brake Line

A bad section of brake line can be cut out and replaced with a new factory-made line if the remaining sections of the old line are not pitted or rusty. The two cut ends of the old line that remain must be cleaned, fitted with flare nuts and flared. A lot can go wrong repairing an old line using this method. It is much safer to remove an entire line section and replace it.

Instructions

1

Inspect the damaged brake line and locate the threaded flare nuts that join the brake system on both ends.

2

Spray penetrating oil on the flare nuts at each end.

3

Unscrew the flare nuts of the damaged line and remove the line.

4

Bend the new brake line into the same shape as the old one so it fits the vehicle in the same way. Use the old line for comparison.

5

Join the new brake line by threading the flare nuts into the unions where the damaged line was removed. Tighten the nuts.