Hey guys whats up? Im having problems with my brakes . Only on hot days when i apply my brakes at a red light or stay on them for a couple of seconds my brake pedal slowly goes to the floor but on when its cooler like at night its fine what could be wrong thanks

Well hopefully thats the problem b/c im putting disc brakes on this weekend. Do you think its the master cylinder? Just trying to find out what it is before i do the brake swap and maybe end up with more problems.

Well i have put the disc brakes on a created another problem. After the alignment the tire scrubs the fender wheel. I rolled the lip in and hopefully thats all that needs to be done. As far as the brakes go I bled them over and over and that didnt fix the pedal going to the floor. I looked for leakage on each brake line while someone was pushing on them and didnt see any leaks, should I replace the master cylinder or what do you guys think. Thanks