I tried to bleed my brakes the other day and not a drop came out. I brought it in thinking something was weird and they told me that there was contamination of the brake fluid. They think that somehow Power Steering fluid or oil got in there, which causes the seals in the brake line to swell and deteriorate.
I've looked around on the web and done some calling around, I can't get a great answer as to how little is actually little enough, nor to how long a very small amount will take to do this. I did find that a 5% power steering fluid will cause enough swelling within a couple days, and a higher percentage will do it slightly quicker. I'm not sure about the amount to 'top off' the brakes if the wrong fluid was used. The initial mechanic and the dealership say that it could take a few weeks or months to cause enough swelling like this. The brake shop that i went to a few months ago is trying to say that since i have a lot of mileage since going there that it now is magically not their fault - regardless of the fact that I brake less with all the highway miles... anyways I digress. Before the owner got in, it was plausible to them. Whatever. That's the argument I'm still in the middle of.
Anyways, the first place that diagnosed and the dealership suggest replacing most of the brake system - all rubber parts including seals and hoses as they have all likely swelled or are at least contaminated and could recontaminate new parts. Again, I'm not sure where the 'cut-off' point is for that, sorry I wish i had more info. Since I had ABS there is a very expensive module that goes with that, without it repairs were looking around US$1800, with that part another grand on top of that.
Some sites are suggesting that if it is a smaller amount that you might be able to get away with just the master cylinder, which is probably about $100-200 or so to replace. If it got into more than that, then you would likely need to do the whole kit and kaboodle.
Before bleeding the brakes or replacing anything, you would want to get a new turkey baster (to avoid more contamination) and suck out the power steering fluid that should have risen to the top as it should rise above brake fluid and hopefully just be in the reservoir and if you are having issues it probalby got some into the master cylinder. Dispose of the baster after use as it is not good for gravy That way, a normal bleeding afterwards should have less or none of the contaminant, reducing the chance for ruining more seals further down in the calipers and stuff.
Check the ABS Dump Valve. If not operating, little or no fluid to rear brakes.
Rear brake cylinders or calibers are corroded and need to be replaced. Also drain the replace all brake fluid.
You get brake fluid that will cause tooth decay
Master cylinder.
A brake fluid leak in the brake system, LOW BRAKE FLUID.
Sticking rear wheel cylinders. More than likely moisture in the brake fluid has caused them to rust. Replace the rear wheel cylinders and replace the brake fluid.
check your brake fluid. you probably ran it low and now there is air in the system. there may even be a leak. you will need to top off the reservoir and then bleed the brakes. look for brake fluid leaking around the inside of the wheels to try to locate the leak.
if brake pedal is soft , either there is air in the system ,a brake fluid leak, or brake linings and pads are worn allowing the pedal to travel to far if there is a fluid leak, this can usually be found by getting under vehicle and looking at inside of wheels for brake fluid
The brake fluid level gradually goes down as the brake pads , brake shoes wear
Worn brake shoes or pads. A leaking brake pipe. Low brake fluid. Air in the brake fluid pipe.
There is no substitute available that can be used for brake fluid. Using anything other than brake fluid could be dangerous and would likely cause damage.
Yes.