Hey guys hope someone can shed some light on this for me. A few days ago I blew the flex hose assembly on my right rear wheel. When I looked at it it looked as if the rubber coating was melted off the flex hose. So, I went buy a new one, installed it bled the lines and the new one did the same thing. Any ideas? I don't understand why or how my brakes are melting the rubber coating on the flex hose. Thanks

 

jdanos, I can think of two possibilities with this. The more likely thing is that where the line is failing, the brake line is rubbing against something on the car. This can cause the metal braiding in the line to be eaten through in a short period of time. Once you metal reinforcement is gone, the rubber tubing can't hold back the pressures generated by applying the brakes (especially a hard braking).

The other possibility is that after years of use, brake lines can fail. Where the issue is that the new line you bought was not reinforced. As mentioned above, a basic rubber line can not be subjected to pressures like that, hence the blowout a second time.

Something else to keep an eye on is where the tie backs are on the lines. if they are not placed correctly, the rubber can be placed near items that can reach up to 1000F. As you can imagine, rubber won't tolerate that kind of condition either. Mainly the rotor is what will be subjected to that kind of heat, but the calipers can reach in the area of 400-500F, still more than capable of causing damage to rubber components. So, you may want to see where you can tie the line off at and see if that helps.

If you could, take a picture of the failed line and maybe that will spark something to me or someone else. I'm sure having the brakes fail on you is not a fun time trying to get a car stopped.

 

ok I've uploaded a couple of pics that i took a few minutes ago. The funny thing is, the first time this happened brake fluid leaked everywhere. this most recent time it happened there is no fluid lost, just an abs fault, and DSC not available messages on the dash. I double checked there is nothing touching the flex hose, only the two points where it is connected to the brake line and where it attaches to the caliper. Hope you guys can make sense of it. Thanks again for any suggestions.