How do you fix a leaking metal brake line?
A leaking brake line means you need to replace the damaged metal line section and properly bleed the brake system afterward. Getting air trapped in the master cylinder or failing to clear blockages will prevent fluid from reaching the calipers, stopping you from restoring safe brake pressure.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Replacing the damaged lines with copper or copper-nickel lines
- 2Running new lines to the flex line
- 3Reverse bleeding using a hand pump
- 4Shutting off front or rear and bleeding
- 5Investing in a pressure-based bleeder
- 6Doing a gravity bleed or using a vacuum extractor
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“I have a 99 GMC Sonoma. This is a picture of it's break line leak, on one side of this connector is a ribbed metal break line and on the other side is a smooth metal break line.”source ↗
“What should be my plan of attack now that i have located the leak.”source ↗
“while bleeding the brakes, we accidentally ran the master cylinder dry.”source ↗
“when we tried bleeding the brakes, the fluid did not appear to be moving, and no brake fluid came out of any of the four calipers.”source ↗
“we tried bleeding it for like two hours nothing coming out”source ↗
Where this came up
People with this problem also raised
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