[chevyboy55]

Ok here's the story from the beginning. My sons 72 was out of brake fluid in the rear chamber of the master cylinder,I found the left rear wheel cylinder was leaking.I replaced it with a brand new wheel cylinder,new shoes,bled brakes etc. Then we were servicing it later(don't remember how long due to it being off the road for 11/2 years for paint & rebuild) & it was dry again.Same routine as before,new wheel cylinder,shoes etc.This time I was being extra careful to make sure that I did not snag or some how tear the rubber on the wheel cylinder. Well as you are I'm sure guessing by now it's dry again! What in the heck can be the cause of this?