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> Brake performance is declining..., pedal is losing its stiffness
Aaron Cox
post Apr 4 2005, 11:06 AM
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ok... so my pedal was uber firm 3 months ago.....and just the other day i dont feel all that confident in my braking ability...i mean it stops... but the pedal is no where near as firm as it used to be....

resevoir is full.... no leaks....anywhere
6 month old SS lines.....
PO's 19mm MC
rebuilt M calipers and
non leaking and one rebuilt rear caliper....

is my MC dying a slow and scary death? i like my pedals rock firm....

oh...btw i KNOW in the future i will be using 986 brakes..... can i use a 19mm MC with those? or will i have to buy a new one at that time (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
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SLITS
post Apr 4 2005, 11:08 AM
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Get some of Scott's Viagra....he says take two and it'll be stiff again....... (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
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tat2dphreak
post Apr 4 2005, 11:19 AM
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bleed 'em!

and bleed the prop. valve. how old if the fluid? what kind of fluid?
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Aaron Cox
post Apr 4 2005, 11:21 AM
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QUOTE (tat2dphreak @ Apr 4 2005, 10:19 AM)
bleed 'em!

and bleed the prop. valve. how old if the fluid? what kind of fluid?

castrol super dot 4 fluid.....

6 month old fluid.... (IMG:http://www.914world.com/bbs2/html/emoticons/mad.gif)
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URY914
post Apr 4 2005, 11:23 AM
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Let it BLEED!!
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Aaron Cox
post Apr 4 2005, 11:26 AM
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QUOTE (URY914 @ Apr 4 2005, 10:23 AM)
Let it BLEED!!

tis my plan.....

i have no knowledge of how old the master cylinder is..... i used a mirror to see that it is a 19mm.........

how would air have gotten in to the sytem? no leaks.... resevoir is always full....


oh well....
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nebreitling
post Apr 4 2005, 11:26 AM
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bleed and find out.
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nickg
post Apr 4 2005, 11:56 AM
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did you try levitra? (IMG:http://www.914world.com/bbs2/html/emoticons/mueba.gif) and remember if your pedal stays hard for longer than 4 hours....consult a dr (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
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Type 4
post Apr 4 2005, 12:06 PM
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How old are the Hoses?
You may have a hose that is failing, look for blisters on the hoses.
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Eric_Shea
post Apr 4 2005, 12:11 PM
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I smell money... (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

I'm pretty sure you need all new brakes on that car Chimp (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif)

(IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif)
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Eric_Shea
post Apr 4 2005, 12:12 PM
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Seriously... you're getting air in there somewhere. Everything tight?
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SLITS
post Apr 4 2005, 12:19 PM
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QUOTE (Type 4 @ Apr 4 2005, 11:06 AM)
How old are the Hoses?
You may have a hose that is failing, look for blisters on the hoses.

with s/s lines, they won't blister...they'll leak
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Aaron Cox
post Apr 4 2005, 12:19 PM
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steve....

hoses are six months old. brand new stainless lines at the time.... all fittings are tight.....but i will go double check them.....

i smell a bleeding brakes BBQ! (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

what does a failing mastecylinder feel like?
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lapuwali
post Apr 4 2005, 12:24 PM
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At a stop, mash the brake pedal HARD and hold it down. If it slowly sinks, then you very likely have an MC leak. Have you checked under the carpet at the pedal cluster? MCs frequently leak down the pedal pushrod, and get brake fluid all over the floor under the carpet.

Water or air getting into the system will cause mushiness. Non-silicone brake fluid likes water, so over time, it will absorb atmospheric water however it can, such as through the reservior vent hole. Usually this process takes a couple of years to show up, but it can happen faster if it's been exceptionally humid recently.
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Eric_Shea
post Apr 4 2005, 12:27 PM
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Check your pedal assembly... if your M/C is going South you'll probably see it there first. This is how it felt on the -6 last spring before I rebuilt everything. I had brakes but... they had to be pumped and if you pumped hard enough they went down fast. The tray was full of fluid.

Yank the carpet and pull the board. Stick your finger in the tray and see if it's damp.
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Eric_Shea
post Apr 4 2005, 12:29 PM
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Does water compress more than brake fluid? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)
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Grimstead
post Apr 4 2005, 12:58 PM
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Hey Aaron,
My brake leg is in good shap if you need some help
(IMG:http://www.914world.com/bbs2/html/emoticons/rocking nana.gif)
Bill
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Aaron Cox
post Apr 4 2005, 01:00 PM
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QUOTE (Grimstead @ Apr 4 2005, 11:58 AM)
Hey Aaron,
My brake leg is in good shap if you need some help
(IMG:http://www.914world.com/bbs2/html/emoticons/rocking nana.gif)
Bill

roger that.....

im like 5 miles from you...sefas club/green river (sierra del oro)

ill let you know...

thanks bill
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Eric_Shea
post Apr 4 2005, 01:31 PM
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I thought about that today when I sent Bill calipers off to him. I was wondering how close you were to each other.

Bill seems like a very nice guy... don't be corrupting him Aa-ron (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
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Aaron Cox
post Apr 4 2005, 01:33 PM
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QUOTE (Eric_Shea @ Apr 4 2005, 12:31 PM)
I thought about that today when I sent Bill calipers off to him. I was wondering how close you were to each other.

Bill seems like a very nice guy... don't be corrupting him Aa-ron (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)

(IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) you know me eric.....

yeah, i wish he could joined us at the ginormous BBQ on saturday......
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