I've been bleeding my brakes and had numerous problems. I won't go into it all, but I've bench bled the master cylinder twice and I still believe that there's air in there. I know that bench bleeding is the way to bleed the thing, but I have a thought: What if I parked my car on a decline so that the master cylinder was level? Would it still be necessary to bench bleed the cylinder, or would parking on a hill, opening the cover, and operating the system a number of times work? What'cha all think?

 

bench bleed it, if anything open the bleeder screws and let it gravity bleed the system. i have a phenoix injector system ( along with a brake pedal jack), little pricy but now i wish i'd bought it years ago. nother better or easier for bleeding hydrolic systems.

 

I've got the phoenix injector, too... http://www.brakebleeder.com ... I bought the V12 w/red case and smart pak. The video that came with it is priceless! It shows you exactly how air gets trapped in the GM quick-take-up master cylinder.

Bleeding those things is a complete bitch. Remember to allow 30 seconds between strokes of the m/c piston to allow the quick-take-up valve to fill with fluid. Also, be careful if using the bleed kit that comes with a rebuilt m/c. Chances are the plastic fittings they give you aren't metric, and don't fit tightly into the m/c ports, so you'll be sucking air.