Flaring brake lines can be a challenging task, especially with infrequent practice and less-than-ideal tools. Even with a borrowed hydraulic flaring tool, achieving a perfect, leak-free flare isn’t always guaranteed. This article details a frustrating experience replacing a rotted brake line on a 2004 Pontiac Vibe, highlighting the difficulties and common pitfalls of brake line flaring, particularly when using 3/16″ tubing.
The Project and the Problem
The project started with a simple brake line replacement on a rusty Vibe. The rear passenger-side brake line, concealed beneath a protective plastic coating, had rotted and was leaking. A new 3/16″ brake line section was fabricated and flared using the borrowed hydraulic flaring tool. A union was installed, connecting the new line to the existing line. Initially, everything seemed fine.
However, during the bleeding process, a new leak emerged. The culprit? The freshly flared end of the new brake line, not the more challenging flare created on the existing line on the car. This frustrating setback led to replacing the wheel cylinder, brake shoes, hardware, and drums – turning a minor repair into a much larger undertaking.
Common Flaring Issues
Several factors can contribute to failed brake line flares. One common issue is improper tool usage. Even with a hydraulic flaring tool, ensuring the tubing is correctly positioned and the tool is properly calibrated is crucial. Another potential problem lies in the quality of the tubing itself. Low-quality tubing may be more prone to cracking or splitting during the flaring process.
Troubleshooting and Solutions
When a flare fails, careful inspection is necessary. Examining the flared end for cracks, unevenness, or other imperfections can pinpoint the problem. If the flare appears damaged, the tubing must be recut and the flaring process repeated. Ensuring the flaring tool is clean and properly lubricated can also improve the quality of the flare. Using a high-quality double flaring tool, specifically designed for 3/16″ tubing, like those offered by Eastwood, is often recommended for more reliable results.
Moving Forward
The next step is to redo the faulty brake line and then address the other side of the vehicle. While frustrating, this experience underscores the importance of proper tools, technique, and patience when working with brake lines. It also highlights the value of investing in quality flaring tools, such as those from Eastwood, designed specifically for 3/16″ tubing, to minimize the risk of leaks and ensure a safe and reliable brake system.
