Scott A

For Christmas I received a four brand new calipers with SS, O Rings. I have them installed and (go figure) I am having trouble bleeding now. I have finally bribed my wife into pumping the brakes while I turn the wrench. I am able to get pressure and fluid to the front but very little fluid to the rear. I have tried to gravity bleed and vacuum bleed with a Mity Vac and motorized pump with little success.

I have followed the order as listed in previous threads and just about every method.

Any ideas or suggestions? :confused:

Thanks in advance

Jvette73

Just to be sure, when gravity bleeding, the master cylinder lid needs to be removed. Otherwise a vacuum will be created reducing the fluid flow. If you remove the bleeders entirely and fill the master(keep lid off), it may take some time, but eventually the fluid should flow through. If not, there could be some kinda sludge blocking the line. Also, if the master ever went totally dry, then it may need to be bench bled first before proceeding to the wheel bleeders. Good luck with it.

Barry's70LT1

How old are the flex lines on the rear.?

They will look fine from the outside. The inner layer of rubber will collapse
causing a restriction. This may not be your problem, however if they are
old, then you can be certain they will be a problem in the future.

I have always used the gravity method to bleed the brakes, it works fine.
If you can't get fluid to run out on it's own, then something is blocking it.

Another hint.!!!!!!!!!!!!!

If you are using someone to assist in the bleeding, by pumping up the brakes.
When you have opened the bleed screw and the pedal goes to the floor,
tighten the screw and DO NOT release the pedal quickly.
In doing so, the fluid in the MC may not be able to refill fast enough to follow
the piston back. This will cause air to be drawn in around the rubbers in the
MC. Release gently.

If everything is correct in your brake system, bleeding is a non issue.

Good Luck.
Barry

Scott A

The master cylinder has not gone dry - however it is possible that something is blocking the flow to the rears. The hoses look good but the car is 30 years old and the lines are most likely original.

Thanks again - I have talked my wife into helping me pump the brakes again tomorrow morning. I will update the progress then.

mrvette

I allways blast an air jet through the lines to blow all the poopie out of the lines...it won't work on calipers or m/cyl...but works on lines and equalizer valves.....if there is a restriction, it should show then...have someone blast lines and you check output flow....

GENE