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Bad Master Cylinder? - Click HERE for Original Thread
ekaxel
My brake pedal was going down if I held pressure on it. Just bled/flush with ATE blue. didn't change the symptom. I guess I'm stuck going to the dealer again. UGH!!!
Gonzo
Perhaps some more bleeding is needed. Sounds like there is some air in the lines.
Eric L.
Yes sounds like a leak in your brake system somewhere. I recently changed to ATE Superblue and found the pedal is noticeably firmer now. Good luck solving the problem, ekaxel.
ekaxel
Gonzo:
Air in the lines results on a spongy pedal. When I am standing at a light the pedal goes steadily down to the stop with continued pressure. The pedal is firm and stops well in normal driving.

IMHO, the pedal going down is a sign of fluid leaking past a seal in the master cylinder...
hfelknor
IMO, if there is no leakage of fluid to the outside world, then the MC is the only culprit.

Homer
ekaxel
That's it Homer!
zebelkhan
quote:
Originally posted by hfelknor
IMO, if there is no leakage of fluid to the outside world, then the MC is the only culprit.

Homer


As a former mechanic I also agree with the diagnosis.
Gonzo
You guys are good.... I agree too (wth Homer's approval) ;)
hfelknor
Approval granted.

Homer
gargoyle
My master cylinder went out last August (search for my thread) and replaced under warranty, so it does happen. The brake pedal went all the way down, with nothing happening. I could pump it and get pressure. Very scarey, so get it fixed ASAP!

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