# Master cylinder question

**URL:** <https://community.cartalk.com/t/master-cylinder-question/114381>\
**Category:** Maintenance/Repairs\
**Tags:** ford, taurus\
**Created:** [March 25, 2018, 2:34am UTC](https://community.cartalk.com/t/master-cylinder-question/114381 "2018-03-25T02:34:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jh500](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@Jh500](https://community.cartalk.com/u/Jh500)\
**Post date:** [March 25, 2018, 2:34am UTC](https://community.cartalk.com/t/master-cylinder-question/114381/1 "2018-03-25T02:34:58Z")

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I have a 2005 Taurus. I replaced the rear brake shoes and then bled the brakes. I have done both processes many times in the past on different vehicles. Afterwards, I had almost no brakes. I am aware that a master cylinder can give out during the bleeding process if it was weak to start with. Therefore, I replaced it with a rebuilt unit. When I took the old one off, I noticed that the fluid drained out of it when I disconnected the brake lines. When I installed the new one, the fluid drained out the brake line connection holes almost as fast as I could pour it in. I have never seen this happen on other vehicles before. This isn’t normal is it? I’m thinking I received a bad one from the parts store. Can anyone shed any light on my situation? Thanks.

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**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\
**Post date:** [March 25, 2018, 11:26pm UTC](https://community.cartalk.com/t/master-cylinder-question/114381/2 "2018-03-25T23:26:24Z")

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How does the new one work? Looks to me like it should drain out:  
 ![BrakeMC](https://global.discourse-cdn.com/cartalk/original/2X/0/042d8fe2003dcf1220df306f178cdffbce6c77d1.png)