Ok I read Till I am blue in the face.. Can not find info I thought I read at one time. So my after market front disc brakes are hard to turn. If you crack the line at the master cy. they become easy to turn.Or let it set for 2-3 days. I think I read somewhere that if you take the line seat out. there is a valve under it you can take out. this was a drum brake master cy.Brakes work great. But going to wear out the pads and it is hard to push the car. This is a 66 coronet with a 67 master cy on it.