Did you fix the problem? if so, what was your problem?

Anyone fix the problem by replacing their master cylinder?

 

Air in the brake lines. Bleeding the brakes will rid of the air and restore pedal feel.

 

i know. but was that YOUR problem?

 

He gave you the solution to that problem!!! That is what you would do to fix it. What else are you looking for? Unless your brake cylinder is going bad.

 

Yeah, that should be the problem unless your master cyl. is bad. But I'm at 107k and the simple answer to your question is no, never had a mushy brake pedal. It's not good to drive that way, one of these days you'll push the pedal and nothing will happen as you can compress air, unlike the fluid.

 

http://forums.maxima.org/showthread.php?t=406127
http://forums.maxima.org/showthread.php?t=406452
http://forums.maxima.org/showthread.php?t=406454

Three threads for basically the same issue.

The first thread says you changed your brakes and then your pedal became mushy. We all told you to bleed your brakes. But you still posted yet another thread.

If your brakes were OK before you changed them, then your problem is in the work you performed, not the system components.

You either have something installed wrong, frozen guide pins, or air in the system. The best thing to do is go over your work and rebleed your brakes. A mushy pedal is 99% of the time due to air injested into the system.

 

Sorry if i wasnt clear... I wasnt really looking for advice, im just interested in the statistics and some info on your problems.

njmaxseltd,
sorry, again, i wasnt clear. the mushy pedal was present even before my install. i was just shocked that it remained mushy even after the, new pad, calipers, rotors and flush.

 

Common sense dictates that based on your situation.....the next step would be to BLEED THE SYSTEM.

 

how's that common sense? bleed it again after only 1 day? im sorry, in dont see how that's common.

 

Cuz you didn't bleed it right!!! If air is still in the system, the end-result is the problem you are having. However, if you bled it and a day later, the pedal got mushy, its probably your master cylinder. Your looking at more $$$ for that. Good luck.

 

Get the Haynes manaul !!

It covers the mushy brake business.. from memory it can be..

1. bad brake booster
2. air in lines
3. Excessive play before engaging (pedal travel)
4. pads
5. bad break fluid

 

What you say totally makes sense. Perhaps he did bleed the system properly and that's why he thinks it's strange to do it again the next day. If it were me, I'd do it again just for my own knowledge. It's not that hard and brake fluid is cheap.

 

If it is mildly mushy, it could definitely be air in the lines. If it is seriously mushy, chances are there is something else at play. Never hurts to bleed the brakes though to see if that helps. Master Cylinder would be the next item on the list.

 

I dont see how bleeding the brakes is easy?! if i could do it with the wheels on and the car not lifted, then yes thats easy.

its always been mushy, bleeding, flushing, even after the new pads rotors and calipers. it never made a difference...

 

Replace the brake lines. Preferably with stainless steel lines. It greatly reduces expansion of the brake lines whenever the pedal is pressed (fluid under compression), so as a result the pedal will feel firmer.

 

Bleeding the system is the easiest and the most sensible step before getting involved with other things. If you change the brake master cylinder/booster, you'd need to bleed the system again. You cannot get around bleeding the system once you've released pressure from it. That's the way it works, that's how hydraulics work, thru pressure.