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Brake Master Cylinder Replacement - New or Used?

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Old 11-27-2011, 04:25 PM
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cjoenck
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Default Brake Master Cylinder Replacement - New or Used?

The brake master cylinder on my '91 C2 is "sticking", i.e. it feels like I have to press past a resistance point before I can apply brakes. I think I read somewhere that this could be due to new brake fluid and old seals not always mixing well.

Would like your opinion - should I replace the master with a new one ($,1,500) or a used one from one of the reliable sources? Is there are a rebuild kit out there somewhere I may have overlooked?

Thank you.
Old 11-27-2011, 04:34 PM
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Rocket Rob
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I'm curious to hear the answer. I have something similar. Mine is only noticable on slow speeds/light braking.

Old 11-27-2011, 04:49 PM
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cjoenck
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That's it, exactly. Light braking only. It feels like you have to get past some initial resistance and then everything is fine. Makes smooth braking in city traffic a little harder because I have to hit the brake harder than I should and then have to ease off - hope my convoluted description makes sense.

I started after a brake fluid flush replacing very old fluid from a previous owner.

Glad I am not the only one with this but would really like to avoid spending crazy money for a new m/c.

Looks like rebuild is a viable option
Old 12-22-2011, 08:26 AM
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geolab
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I have a brand new one for half that price
Old 12-22-2011, 10:53 AM
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FeralComprehension
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I don't think I'd buy used for that component. Rock Auto (no affiliation) has a series of options from 'send yours in for reconditioning' ($50-$80, depending on model) to $500-$650 for new.
Old 12-22-2011, 11:41 AM
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Makmov
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I have heard rumors that they are rebuildable, however, not according to Porsche and I don't know a of a "Kit" to do it. People just seem to try and match up some new seals for their exsiting master.

It does seem like rediculous money for a master.
Old 12-22-2011, 11:47 AM
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Originally Posted by Makmov
I have heard rumors that they are rebuildable...

It does seem like ridiculous money for a master.
Yeah, I doubt the UFO technology was required for that part; should be standard stuff in there.

WRT the Rock Auto rebuild operation, these are done by Cardone which is a big rebuilder of halfshafts. Presumably, they know what they're doing and at the price you're not risking much; what's $50 if you're looking at $1500 for a new master from the dealer?
Old 12-22-2011, 02:58 PM
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90_C2_Cab
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Some of the prices for parts on this car are just plain stupid!
Old 12-23-2011, 01:32 AM
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race911
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One of the things I've not had to do, but isn't a 993 unit a pretty easy retrofit? (No interest right now in searching.)



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