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1991 Master Cylinder

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Old Feb 23, 2014 | 01:13 PM
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Default 1991 Master Cylinder
Hi all, I keep having trouble with my Master Cylinder leaking. I tried both reman and new from Oreilly but these things just keep leaking on me. I spoke to Chevy and looks as though new AC Delco is no longer available. Any suggestions on a quality new or reman unit? Thanks.
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Old Feb 23, 2014 | 01:24 PM
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You might want to buy a used one from a recycler such as www.vette2vette.com in order to get OEM.
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Old Feb 24, 2014 | 08:37 AM
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Actually Rockauto offers a Wagner brand and a Raybestos brand. Does anyone have any feedback on either of these?
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Old Feb 24, 2014 | 01:03 PM
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PBR are good too,they make brake components ,i have one on my 85 from Summit...
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Old Feb 24, 2014 | 06:44 PM
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Originally Posted by hgoodwiniii
Actually Rockauto offers a Wagner brand and a Raybestos brand. Does anyone have any feedback on either of these?
Made in China & branded Wagner/Raybestos
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Old Feb 24, 2014 | 10:51 PM
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Yea, I'll bet;
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Old Feb 25, 2014 | 01:38 AM
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AC Delco master cylinders are made by PBR.
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Old Feb 25, 2014 | 04:06 AM
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Originally Posted by Cliff Harris
AC Delco master cylinders are made by PBR.
...but probably now PBR makes his master cylinders...in China
Last edited by tunedport85inject; Feb 25, 2014 at 07:19 AM.
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Old Feb 25, 2014 | 08:10 AM
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What choices do we have? I really don't want to jack around with brakes. I need them to work. I've put like 5 of them from Oreilly on my car in the past year and they leak like crap and it does not take long for it to happen.
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Old Feb 25, 2014 | 11:07 AM
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Originally Posted by hgoodwiniii
What choices do we have? I really don't want to jack around with brakes. I need them to work. I've put like 5 of them from Oreilly on my car in the past year and they leak like crap and it does not take long for it to happen.
G'day from central Indiana. Not sure if you're interested, but I've got this one, which has the '91 reservoir configuration. It's an OEM unit from a batch of spares from Tommy Morrison's race shop. From its appearance, I don't think it's ever been on a car. I just bench tested it. Both channels are clear. Asking $100 shipped.

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Old Feb 26, 2014 | 11:49 AM
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I had 3 brand new with dual reservoirs attached Cardone M/C leak after installation and bleeding. This was over a 2 week period. Leaking where reservoirs sit on M/C. Per suggestions here, getting a Dorman M/C.
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Old Feb 27, 2014 | 06:22 AM
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Originally Posted by hdrydr1051
I had 3 brand new with dual reservoirs attached Cardone M/C leak after installation and bleeding. This was over a 2 week period. Leaking where reservoirs sit on M/C. Per suggestions here, getting a Dorman M/C.
Yep me too
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Old Mar 7, 2014 | 08:40 AM
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Could it be synthetic brake fluid that's allowing the master cylinders to leak? That's what I'm running in my car. I believe I am going to try the Raybestos brand MC this time.
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Old Mar 8, 2014 | 07:26 AM
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No to the synthetic. Used the same in the Dorman as in Cardone and no leaks.
Last edited by kenmohr; Mar 9, 2014 at 06:27 AM.
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