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Author Topic: master cylinder rebuild  (Read 406 times)

smd123

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  • Posts: 5
    • 1991 XR2
Re: master cylinder rebuild
« Reply #15 on: May 11, 2020, 07:20:25 AM »

I tried placing the order with Summit too.  It sat there for a week. I called them and their representative put me on hold and called Cardone.  They said nothing's going to happen unless Cardone happens to get one in.  They said I could have someone send my master sent back in to Cardone to have it rebuilt.  So I canceled my order with Summit.

Then I placed an order with Rock Auto and mailed my master back to Cardone in Texas.  They sent it back 3 weeks later as "unrebuildable".  They didn't say why, but I have to conclude that there are no parts available for it.  Mine is in very good shape other than the molded plastic valve on the top.

So I ordered that cylinder from Ebay Australia and have been waiting 4 weeks now for shipping. Hopefully it shows up someday and works...
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Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
    • http://www.werbatfik.com
Re: master cylinder rebuild
« Reply #16 on: May 11, 2020, 09:35:09 PM »

I have a spare used one kicking around somewhere, if I run across it I will tear it apart to see what all goes into it. There have to be modern parts available that will fit, I imagine tricky to find though

The extra tricky part is that our OEM unit seems to have the proportioning / splitter valve built into it - most other Mazda chassis of this era had external prop valves. Otherwise it may be possible to switch to another MC.

I recall having seen some 323 guys switch to a Mazda 929 MC, and even a Mitsubishi EVO master cylinder. My memory of these things is growing foggy. However after a quick look on Rockauto it seems the 323 uses a drastically different brake booster setup so this is probably not a viable option without switching the booster out.

I have the booster & master cylinder out of an early Mazda MX-3, complete with external prop valve, that I was going to try to fit to the GTXR2. A friend parted his MX3 out and I grabbed it, it appears to have the correct bolt pattern to mount to the firewall but I don't think I ever tried to fit it. I believe it had a larger bore MC which is what I was after to balance my brakes after doing the Galant big brake set up front
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Rocketman

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    • 91 BPT AWD Capri & 1991 XR2
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Re: master cylinder rebuild
« Reply #17 on: May 11, 2020, 09:38:30 PM »

I saw listing for Dorman new Master cylinder on Rockauto.
https://www.dormanproducts.com/p-15106-m390064.aspx

Interesting that there are two OEM part numbers for it.

It looks like most places are out of stock but Summit Racing is allowing me to add it to my cart. A bit pricey but worth a try?
https://www.summitracing.com/parts/dhb-m390064

Wonder if you called Dorman if they'd make some more? hah
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


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