I had poor performance from my SRAM Apex hydraulic disk brakes. This weekend, I bled them, and it seemed to solve the problem. However, on my next ride, I decided to test the newly bled brakes with a particularly hard stop. When I did so, I saw a puff of smoke. I assumed that it was oil on the hot rotor, so I looked closer. Sure enough, when I pump the front brake hard, a little oil runs down the disc. Also, the lever is almost as soft as before I bled the brakes. At least the rear brake seems fine.
At this point, I'm not sure what to do. I know the disc needs to be cleaned and the pads need to be replaced, but I do not know how to fix the leak. I don't even know where the leak is coming from, because the bleed port and cable are dry on the outside.
A couple of questions: First, where could it be leaking from? Could it be from around the pistons? If so, how would you fix it? Second, could this be fixed under warranty? I assume it would be SRAM warranty, not Planet X, right? The bike is almost brand new. If so, how would I go about that? Do I take it to my LBS? The bike was bought online. Please help.
I miss the cheap and simple mechanical discs from my last bike.