Question about Chevrolet Monte Carlo

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Replaced calipers, rotors, lines and master cyliner just isn't working and lines are leaking. Have bled them twice. Any ideas? This is a '79 Monte Carlo with mini V-8.

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If your lines are leaking you need to disassemble and start over. make sure all connections are clean and USE NO SEALANTS! look for metal burrs on all internal fittings, dirt is your worst enemy here and if something get cross threaded its junk. DO NOT RE-USE CONTAMINATED FLUID...

Posted on Oct 02, 2010

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The leakey brake lines must be repaired before you bleed the brakes system the mastercylender is sucking air in and that is why you can not get the air out of the lines

Posted on Oct 02, 2010

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1 Answer

No brake pressure


When you bled the system was fluid coming out the bleeder valves?
Where the bleeder valves closed off with the brake pedal fully depressed?
Is the fluid reservoir cap ok?
Is the master cylinder ok?

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1994 Pontiac Grand Am Brake pedal sinks to floor.


I've had the same problem before, ended up being a bad master cylinder that I just purchased. Replaced it with a different brand and it worked fine.

Apr 23, 2013 | 1994 Pontiac Grand Am

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2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Jul 23, 2017 | 2001 Chevrolet Silverado 2500HD

1 Answer

I am replacing the front brakes, rotors and calipers on a 2003 Olds Alero 3.4 V6. I've bled the lines until it went into cardiac arrest! I've disassembled twice and bled out the calipers, yet the...


Spongy brakes could either a piston leak which would be visible or the master cylinder which you may not be able to notice. I would say the latter is more probable as the fluid can pass through inside the master without leaking. Usually you can purchase kits for them although some models are sealed units. The squeaking you are hearing could be the wear indicators but I am assuming you put new pads in. If not then I would advise you do. If you have then check there is clearance between the wear indicaters and the disc you can bend them out if required.

Aug 15, 2011 | Oldsmobile Alero Cars & Trucks

2 Answers

Just replaced rotors, calipers, caliper brackets, and pads. Bled all four wheels, starting with the farthest away from the master cylinder working my way to the closest. Brake pedal feels firm when car...


Bleed with the car running and make sure all the air is out. Now make sure there is no leak and the pad contact are adjusted without much gap so that the calipers hold on. make sure the servo assist is correct, if so and the master cylinder was set right , it must work. Please recheck all your work once again to trim up.

Sep 28, 2010 | Nissan Xterra Cars & Trucks

1 Answer

Pistons in both front calipers stay out, both calipers replaced


You may have a leak in the booster or master cylinder. You can put a pressure tester on the system to test for leaks. It does sound like you have an air leak.
You can try to bleed the master cylinder, then slave cylinder, then brake lines.

Aug 24, 2009 | 1993 Oldsmobile Achieva

3 Answers

Just replaced master cylinder on 1990 aerostar and bled the brakes, still the pedal goes to floor and i have no brakes


Did you bench bleed the master cyl. before installing it? then when you installed the new master, did you bleed all 4 points? If yes, then check all for points for leaking caliper/s and leaking wheel cylinder/s. If the van has ABS, check the valve body for a bleeder screw and see if air bleeds out of it. If you've checked everything twice and did everything right then your new master cyl. may be defective.

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