That was my problem. I took off both cylinders and attached the lines of the backing so that I could make sure of the threading before I put them back. From: tcb-bounce@xxxxxxxxxxxxx [mailto:tcb-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Chamberlain Sent: Tuesday, September 27, 2011 2:18 PM To: tcb@xxxxxxxxxxxxx Subject: [tcb] Re: hey ya'll brake question Just talked to Metaphysical Volkswagen here in Austin and Toby said that the new wheel cylinders I put on the front are not machined correctly and the line between the two cylinders are not seating all the way. It is just enough to let air in the system but it doesn't leak fluid out. Getting ready to pull them off and start all over. On Tue, Sep 27, 2011 at 2:06 PM, Denis Dodson <coocoo@xxxxxxx> wrote: One way I make it easy is, I have a lift. I use the soda pop bottle with 4" of brake fluid in it and a clear plastic hose the size so that it goes on to the nipple and stays. Start with the wheel furthest from the master cylinder loosen the nipple and go to the front and pull down on the brake lever (or have someone in the car push the peddle) a few times till there is no air bubbles. Tighten the nipple and proceed to the next closest wheel. I guess my keys are a lift and a pop bottle and hose. Nipples do get old clogged. Make sure the brakes are adjusted close before bleeding. There are "speed bleeders" that are great. I have them on my front brakes (don't ask why I only have 2), but they are great. Open the nipple push the pedal till no air and tighten them. No need for hose or bottle. I know this stuff from doing it wrong or badly for so many years. From: tcb-bounce@xxxxxxxxxxxxx [mailto:tcb-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Chamberlain Sent: Tuesday, September 27, 2011 12:50 PM To: tcb@xxxxxxxxxxxxx Subject: [tcb] hey ya'll brake question OK Dennis I hope you got your brakes stoping. Are there any tricks that I'm missing in bleeding? I replaced rear wheel cylindes and shoes all the way around on Tylers '65 bus. I can't get them to bleed out. Suggestions?