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Thanks Glen! Everything is brand new, so I shouldn't have any corrosion problems. I'm quite sure I don't have any crimped lines, as they're also brand new, and I ran them. Yes, I bled the front and rear of the MC separately. Bench bled them both first. Would you have a suggestion of what prop valve to get? My first inclination is to get the Wilwood adj valve. Thanks! GLENN BAILEY wrote: > > Replies to this message are sent to The Chevelle Mailing List > ------------------------------------------------------------ > > Did you bleed the rear chamber of the MC separately? If not, start there. > Mix & match brake part problems are always difficult to solve. The most > common cause I have seen is the brake light switch mounted down on the > frame. They corrode inside over time, and the piston never moves out of the > center. When you bleed 1 side with air in the other, it forces the piston > all the way to the air side where it sticks in the corrosion. The quick > shop fix i learned was get some one to pump the brakes up fully, tap the > valve with a hammer to jar the piston, and open the front bleeder to release > pressure on that side. This uses the hydraulic pressure in the back side to > push the piston back toward the front (now low pressure) side. You can hear > the piston snap back when it releases. May take several tries. They'll > take a pretty good whack without breaking usually. If this is unsuccessful, > replacement is the only option. Make sure MC is bled first. > You can do a fluid flow check before trying this if you want by bleeding > your MC chamber first, then checking flow in & out of the switch to verify > that its different. At the shop we never spent the time, you just whacked > 'em & they usually cleared up. > A crimped line on the back section of the system or damaged hose would also > cause you trouble. If the car has been disassembled and worked on alot > since it ran, I'd look at those issues first. > P.S. When you get it working, get the proportioning valve. Improves safety > & helps avoid premature wheel lockup. > Good luck > Glenn > > >From: Michael Pell <[EMAIL PROTECTED]> > >Reply-To: [EMAIL PROTECTED] > >To: ChevelleList <[EMAIL PROTECTED]> > >Subject: [Chevelle-List] Help: Ford 9" with disk brakes on a Chevelle? > >Date: Tue, 30 Oct 2001 10:42:41 -0500 > > > > > >Replies to this message are sent to The Chevelle Mailing List > >------------------------------------------------------------ > > > > > >I'm building a pro-street '69, and put in a Ford 9" rear with the Ford > >OEM disk brakes. > >I have the stock '69 Chevelle Master Cylinder for a manual disk brake > >car, it's the big one. > >The front brakes are GM stock brakes for a '69 Chevelle. > >Everything is brand new (MC, calipers, hoses, shoes, lines, etc). > >The front of the MC resevoir is being used for the front brakes. > >I am not using a proporting valve, as suggested by a Wilwood tech. > >Although I'll be happy to put one in if it's necessary. > >I'm using the DOT5 brake fluid. > > > >Here's the problem. The rear brakes apparently aren't getting enough > >fluid. The front brakes bled normally, and the pedal would go clear to > >the floor, and I would get the expected amount of brake fluid with each > >pedal push. > >However, with the front caliper bleeders closed, the pedal would only > >push half-way down. So, while bleeding the rear brakes, it took nearly > >20-30 half pumps to get as much fluid to the rear calipes as 4-5 pumps > >on the fronts. > > > >With the rear of the car on jack stands, the rear brakes will stop the > >tires with no problem, so I know the brakes are partially working. > > > >I'm quite sure I have all of the air out of the lines. I bled quite a > >lot, waited a week, then bled again. > > > >Any suggestions? I'm tempted to swap the lines at the MC and see what > >happens. > > > > > >Also, the parking brakes are not working on the Ford brakes. The lever > >is being turned all the way, but nothing is happening. Any suggestions? > > > >BTW: This is my first experience with the 9" rears, so maybe I've > >missed something. > > > >Thanks! > > > >-- > >Check out my webpage at http://www.ProStreetCar.com > >and my For Sale page at http://www.ProStreetCar.com/classifieds.html > >Team Chevelle membership #178 (Gold) > >Time Flies: "It's funny how you can watch a clock and time seems to > >stand still. But turn away, and you have to measure time with a > >calendar rather than a clock." mjp > > > >----------------------------------------------------- > >To Unsubscribe please visit www.chevelles.net/list.html > >To start a new topic, send mail to: [EMAIL PROTECTED] > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > > ----------------------------------------------------- > To Unsubscribe please visit www.chevelles.net/list.html > To start a new topic, send mail to: [EMAIL PROTECTED] -- Check out my webpage at http://www.ProStreetCar.com and my For Sale page at http://www.ProStreetCar.com/classifieds.html Team Chevelle membership #178 (Gold) Time Flies: "It's funny how you can watch a clock and time seems to stand still. But turn away, and you have to measure time with a calendar rather than a clock." mjp ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
