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Why is my master cylinder throwin up brakefluid.

Discussion in 'The Garage' started by afroman006, Mar 6, 2005.

  1. afroman006

    afroman006 1/2 ton status

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    I recently replaced my master cylinder with a rebuilt one from autozone and now I have a leak coming from somewhere. I tightened the line fittings as much as I dare to but there is still fluid dripping from somewhere. It is a significant leak, after about a week and a half the front reservoir was empty. Judging by where the fluid is on the outside of the MC, I am guessing it is coming out of the top somehow. But I cant figure out why. Anyone have any ideas?
     
  2. Gixx

    Gixx Registered Member

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    Check the gasket under the cap -

    You can bend the retaining bar "spring" some to cause it to apply more pressure to the cap. My rebuilt unit did the same thing...
     
  3. divorced

    divorced 3/4 ton status

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    Plastic or steel resevior?
     
  4. afroman006

    afroman006 1/2 ton status

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  5. divorced

    divorced 3/4 ton status

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    Not for sure, maybe the gasket at the top?
     
  6. dieselponyexpress

    dieselponyexpress 1/2 ton status

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    Same with my rebuilt unit. :crazy:

    Leaks from top. I inspected the reservoir and detected that the surface isn't machined well. There are small cracks and sometimes the upper edge measures less than 1mm.
    Obviously not a perfect seal.

    I'm thinking of an additional homemade gasket now . . .


    Regards,
    Walter
     

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