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Re: Rear brake line was removed and now i need to bleed...
You need a 1/4 or 5/16" wrench and procedure requires bleeding all corners staring with furthest away from master cylinder working your way closer (Rt Rr, Lt Rr, Rt Frt, Lt Frt)
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Vic, Because you changed master cylinder air probably got into the ABS modulator. Air can be very difficult to remove from an ABS modulator assembly because of the solenoid valves, if no bleed screw on the modulator, you may need a pressure bleeder and a scan tool to cycle modulator to bleed trapped air. Check the attached links,instruction and guides, Good luck. "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." Bleeding ABS Brake Systems http://www.automotiveforums.com/t980156-discuss1998_blazer_brake_bleed_problem.html Bleeding ABS Systems
You need a special tool to bleed the brakes due to the Anti Lock brake system. You will need to see the dealer on this or a well equipped brake repair shop.
you most likely have a brake line rusted threw, cut the line ahead of the leak and after the leak and splice in a new piece of brake line, it will have to be steel, you can not use rubber. if you take the line to a parts store they can size it up and get you a piece of steel line and some pressure fittings to put it back together, after you repair the line then you will need to bleed the rear brakes.
U need a special tool that holds the poppet valves open in the ABS hydraulic control unit to bleed the brakes of air, without it u CAN'T get the air out of the system.
This could be very difficult due to access and being able replace line from its 2 union points. you will have to purchase stright brake lines and bend to fit then bleed the brake system
Common cause is the drums and brake shoes need to be replaced. When there no longer within the the specification for the brakes to work properly, the self adjusters will over adjust the brake shoes and you'll have the feeling of the rear drum brakes lock up as the shoes will bind up along the drums. Replace both Shoes and Drums and this can be done on your own will common tools and a simple brake spring tool that you can pick up at Auto Zone or Parts Source and both can give you the step by step instructions to replacing the rear brake system. Good luck and be safe.
the problem here is in order to bleed the brakes properly u need to have a special tool to open up the ABS high pressure pop-it valves, this special tool will be avail at the dealer or in a generic form at any well equiped front end shop, u just can't bleed the brakes without it, I see this same posted problem over and over, this information is correct, u will need a shop to bleed the brakes
have one person in the blazer pumping the brake pedal and then hold to the floor, crack the bleeder then tighten, release pedal, repeat till all air is out one side at a time, if this does not work then your ABS unit is bad witch if u follow your lines from your master cylinder u will find a black box with a motor on it, or the master cylinder itself is bad, it also can cause u to have no pedal, replace the master cylinder first, most likely cheaper.
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