Quote:
Originally Posted by HO455
The problem with brake lines is they rust from the inside too. Brake fluid absorbs moisture from the air until saturated and over time it drops out and the steel factory lines began rusting. That one reason why it is recommended that brake fluid is replaced regularly. So old lines may be fine until that time you really hammer the brakes and that rusted spot you can't see fails.
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I know someone who was stubborn and didn’t want to replace brake lines. They repaired the rear line twice, with compression couplers (cringe), before finally replacing it. Then when one of the front lines failed they did the same compression coupler repair until it failed in another spot and they replaced both front lines and the hoses. I don’t know how but thankfully there were no incidents to go along with all these failures.