Join Date: Nov 2001
Thanked 5 Times in 5 Posts
Re: Brake Problem?
Contrary to what's often said on this board, you don't NEED to bench bleed, it just makes life easier when you go to bleed the entire system. If it's been on for six months, it's bled.
If bleeding the brakes cures the problem but you have to do it occasionally, I suspect you're getting air in the system. From what you wrote, you don't know that you're not loosing fluid, just that you are not loosing enough to notice. Look for stains on the inside of your tires caused by fluid leeks. Check all the hoses for being damp, run your hand under the brake booster, check at all the fitting connections and at the proportioning valve. Look where you park for stains on the pavement, you don't have to be loosing much fluid to have a problem.
I don't think your problem is dirty fluid, but gravity bleed them and get the old stuff out of there. Bleed only the front or rear at a time and see which one cures the problem so you know were to look. Then bleed only one wheel at a time. If the right front always cures it and is the only one that cures it, the problem is in the right front. If bleeding either front cures it or you have to bleed both fronts to cure it, the problem is probably in the master cylinder, the proportioning valve or the common lines.