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simy
24th March 2013, 04:26 PM
Yesterday my brakes went straight to the floor when i went to go out in the morning, still work but only at the very end. I had a mechanic fit an extended brake line in the rear last week. He bled the brakes but i've found fluid leaking from the reservoir, like it was overfilled, it's stopped now at 3/4 in the reservoir. I'm guessing i just need to bleed the brakes again maybe air got in the lines, or maybe brake booster gone? Just no pressure at all until its almost at the firewall.
NP99
24th March 2013, 05:25 PM
Bleed, wipe down/degrease everything then check for leaks again.
simy
25th March 2013, 04:44 PM
bled brakes and it is leaking at the back of the master cylinder wher it connects to booster, now the question is, which one is broken?
pearcey
25th March 2013, 05:02 PM
The master cyl is leaking the booster has nothing to do with the hydraulic side of the brake system
simy
25th March 2013, 07:25 PM
The master cyl is leaking the booster has nothing to do with the hydraulic side of the brake system

Ok, so it's the master cylinder then, would that be why there is no pressure to bring the brake pedal back and have no pressure at the start?
pearcey
25th March 2013, 07:50 PM
Mate if the pedal goes to the floor then you have a hydraulic problem.If there is fluid running down between the master and the booster then the master is leaking. If you over fill the reservoir or the cap is not fitted correctly fluid can be pushed out over the top of the reservoir and run down between the master and the booster and give you the impression of a master cyl leak. If this is the case then you have a problem somewhere else in the system but not in the booster.
happygu
25th March 2013, 08:19 PM
It isn't too hard to take the master cylinder off to check - but if you are really worried and not sure i would take it back to the mechanic and get him to check it.

The least he can do is look at it for you.

Mic
Mojo01
31st March 2013, 12:48 AM
If you know how to bleed brakes, then changing the master cylinder is an easy job, my pedal started to get nasty a while back, and was sinking to the floor, it was leaking from the seal where the pedal activates the master cylinder, it only took me just over an hour to install it, and a bit of time to bleed the brakes back up ( took longer to teach the wife to help with the bleeding of the system than it did to put the master cylinder on ).