leaking master cylinder

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Stevecoulsin
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leaking master cylinder

Post by Stevecoulsin » Mon Jan 06, 2020 2:25 pm

Hi, I seem to have a slight weep from my brake master cylinder where it is fixed to the servo. Cleaning with brake cleaner removes the fluid but even as you watch a small 'wet' area appears again. After a few minutes the dampness has spread along the whole seam to the right of the staring point. Not easy to photograph but I hope the small wet spot at the top of the master cylinder where it joins the servo is visible - ringed red in the image. Before I strip it I wonder if I can get a few tips. I assume a seal has gone in the master cylinder but is it likely the servo is OK or am I looking at replacing this as well?
thanks, /Steve
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Steve Coulson, MB66, previously 1973 SE5a & 1976 SE6a, TVR Tasmin, Spitfire Mk III, Beta, Scirocco GTX, Mini Clubman.

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scimjim
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leaking master cylinder

Post by scimjim » Mon Jan 06, 2020 4:31 pm

The servo shouldn’t have any fluid in but if the rear MC seal has gone, you might have to remove it to clean it out (up there with heater matrix or wiper spindle replacement I’m afraid). The MC itself is simple by comparison and if the bore is okay you might get away with a seal kit?


Jim King

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Stevecoulsin
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Joined: Fri Jan 25, 2019 6:30 am

leaking master cylinder

Post by Stevecoulsin » Mon Jan 06, 2020 5:14 pm

Many thanks Jim.
Sounds like I will try with a seal kit to start with.
Best, Steve.


Steve Coulson, MB66, previously 1973 SE5a & 1976 SE6a, TVR Tasmin, Spitfire Mk III, Beta, Scirocco GTX, Mini Clubman.

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