Question about Oldsmobile Cars & Trucks
Possibly there is no clearance between the master cylinder piston and the brake booster push rod which could be preventing the piston returning fully so the fluid inlet port remains covered or partially covered.
When replacing the master cylinder or any part of the brake pedal linkage or brake booster it is important to ensure everything is correctly adjusted and a clearance exists between the booster and master cylinder piston. In the absence of the correct service tool some fancy measuring is needed; a clearance of about 8/10 thou inch is about right. Sometimes the booster pushrod is adjustable and sometimes shims are needed.
Posted on Jul 15, 2018
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Posted on Jan 02, 2017
SOURCE: 2001 Mustang GT rear brake job
yep this is a two man job, onece you get air in the lines is better to do all four, my has abs and i was able to do it, but next time don't take anylines lose just turn the piston clockwise and you should be able to push it in.
Posted on Oct 12, 2008
The brake fluid level sensor in the master cylinder is stuck in the lower position which completes the circuit to illuminate the light.. Try tapping lightly on the side of the reservoir to loosen it. If that does not help, you will need to replace the level sensor.
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Posted on Jan 25, 2009
I am a hydraulic technician and I can tell you that air is a killer in the hydraulic system.
Start from the rear and work your way forward. I f you are using the two person method, make sure the second person keeps the master cylinder full. If the fluid level dropped anywhere in between pressing and releasing the brakes....you have a lot of air in the system.
Make sure you are tightening the bleed valve when the brake pedal is full pressed.
Remeber...start from the rear brakes first, then do the front.
Posted on Mar 16, 2009
Honestly your guess is as good as mine. But I don't think the master cylinder is NOT bad you still have air in the system. Get a big bottle of brake fluid bleed all four sides until you run out of fluid or your brakes work properly. You should divide the bottle's content in four, then use each quantity in each side. You'll be removing air and contaminated fluid from the system. Get a small hose that fits on the bleeders and an appropriate container. I have a good feeling if you do this your brakes will work just fine. I don't know how you are bleeding the brakes. I'll let you know the proper way just in case. This is a two man job, with the wheel off, have someone start the car. Have them pump the brakes a few times to get pressure. 1With the brake pedal UP open the bleeder, 2then have your assistant press the brake pedal all the way down and leave it completely pressed down. 3Close the bleeder valve, once close and only with the valve closed have'm release the brake. Repeat as necessary, bake depressed, open valve first then press brake. DO NOT depress until valve completly closed. Close valve THEN depress. Good Luck!
Posted on May 15, 2009
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