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-   -   Do I have a bad master cylinder? (

j-rod17 09-15-2013 09:11 AM

Do I have a bad master cylinder?
ok so far I have replaced all pads and rotors. replaced rear caliper, and took WJ to a shop to have the entire brake fluid drained and flushed and bled.

I still have an occasional random "soft pedal" feel. Once in a while the pedal gets soft and takes more down pressure to apply brakes. I can let off the pedal fully and reapply and the pedal is solid and works great.

I am looking to trade/sell this WJ and I do not want to sell a known issue.

So...brake master cylinder?

other thoughts?

j-rod17 09-15-2013 06:04 PM


dont want to start throwing parts at it if I am mistaken

WJ02FNG 09-15-2013 06:24 PM

If you bled the brakes properly, then yes, it's your brake master cylinder.

dxm113 09-15-2013 06:25 PM

Have you checked your brake lines? Hard lines and soft lines? I would give those a once over as well.

Ravie 09-15-2013 06:35 PM

yes. Though my M/C went leaky in the booster on me and got soft...

WJ02FNG 09-15-2013 06:36 PM


Originally Posted by dxm113 (Post 16033337)
Have you checked your brake lines? Hard lines and soft lines? I would give those a once over as well.

Yes. Check these as well.

4xTroy 09-15-2013 07:05 PM

I know brakes are critical, but how urgent is it to check/replace the lines and/or master cylinder? Right now, I'm having the same issue with some random sponginess, though it's neither regular nor predictable.


WJ02FNG 09-15-2013 07:18 PM

Your question is your answer. They are critical-period. What if it fails driving through a school zone? The highway?
Be smart and fix it right. Your life and other lives depend on it.

j-rod17 09-15-2013 08:05 PM

Mine were bled twice. Once by me. Once by a shop.

I don't notice any leaking. No loss of fluid

WJ02FNG 09-28-2013 11:16 AM

Please post follow up!

TJRUSSELL 05-19-2014 04:11 PM

What was the outcome? Was the master replaced?

The time now is 02:24 AM.

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