Thread: give me a brake!!!

Tweet

Try to hook the front brakes to the back hole in the master and bleed them ,then re attach to front,if possible?
Bad calipers ?
Bad master cylinder ?
Could be tons of air trapped still,did any fluid at all come out the front?

Hooking the front to the working master cylinder fitting would rule out calipers..................seems awful unlikely that both calipers would be bad or they would not be able to be bled...........,my bet is on the master cyclinder not working correctly.
Swaping the connections would rule the front calipers and determine if the one port was bad on the master cyclinder.
Could be air in the master cylinder still too,might loosen the front fitting and see if fluid is being moved at the cylinder?
I know the motto is bleed ,bleed and bleed some more ,when it comes to brakes.

How tight are the rear shoes adjusted up, and how much clearance do you have in the front rotors to pads? I would crank the rear shoes maybe a little tighter than you intend on finally running them, and start bleeding at the furthest corner.

It sounds to me like you have something going on in the front, since it did improve when you blocked those off.

Don

Yes I have adj the rear shoes real tight and the front pads are new. Although the master checked out ok I may try another one.

So I have pluged the outlets in the master cyl and it has a firm pedal. I then left the plug in the front line and hooked up the rear brake line and had a firm pedal. As soon as I hooked up the front line I had no pedal. I then clamped off the rubber brake line at each front caliper. I had a firm pedal but when I unclamp no pedal. I have replaced the calipers 2 times and vac bled and foot pump bled and still no pedal. This is a 78 camaro sub frame with 78 brakes. Chevy changed calipers around 80 to what they call a slow drag cal. This cal will not work with a reg master cyl. Anybody know how to check on what cal this could be. I am running out options?

Same here... It has to be in the calipers. If you have a pedal with both rubber hoses clamped at the caliper then thats all thats left. But 4 bad calipers is hard to believe.

Just a thought reading your post. If I understand, you have the 2 lb residual going to the disk brakes? If so I would put the 2 lb to the drums and 10 lb to the disc. The other thing, if you watch the master cylinder reservoir when you release the brake pedal does is seem like an excessive amount of fluid is returning? Some should return but not a huge amount?
Ken

I just checked back on Master power brakes web site and it shows the 2 lb to the disc and 10 lb to the drums just like I have it. I will have to check the master cyl level and see whats going on there when I release the brakes..