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FD RX7 master brake cylinder out of stock? Don’t worry we have alternate solutions
Hello everyone, just here trying to save some money to keep all my FD guys on the road. So unfortunately, my 93 RX7 Master brake cylinder started leaking internally, I’ve searched throughout the web, forums, and auto parts store and couldn’t find any master cylinder that’s available. I got fed up and started looking for an alternate solution. Finally, just looking through the web and decided that since Mazda has other vehicle models, I decided to browse around and see if the other 90’s Mazda has a master brake cylinder rebuild kit available. I found one for the FD, it was around $150+ and didn’t want to pay that much if I can find a brand a new brake master cylinder assembly. So, I found tascaparts.com and it has listing with all the alternate vehicle. I wen’t on ebay and purchased a NEW UNBOXED Brake Master Cylinder For 93-97 Probe, Mazda 626, MX-6. I took everything out and mic’d it out with a vernier caliper and everything were the same specs. Swapped all the internal from the 626 and installed it on the FD brake master cylinder. See attached pic for comparison. The one on the left is the FD and the right is the Mazda 626/MX-6/Ford probe master cylinder. Hope this help and just trying to keep our community alive.
Last edited by NEWGENRX7; Dec 9, 2022 at 09:47 PM.
Yeah good luck trying to find a 929 nowadays. You cant even get a rebuild kit from mazda anymore…
and it doesn’t need machining. You need to change the fitting on the one side on the existing hardlines
good find OP. with age these parts need to be freshened up
The reason to change the fitting is because the 929 MC is designed to use a flare fitting and not a banjo bolt. Chips (or your favorite local machine shop) offers a service to machine it for the stock banjo fitting, which would be my preference.
Yeah good luck trying to find a 929 nowadays. You cant even get a rebuild kit from mazda anymore…
and it doesn’t need machining. You need to change the fitting on the one side on the existing hardlines
good find OP. with age these parts need to be freshened up
so i ran across a potential alternative/substitute - the 98-2002 626 (the USA got its own version, so if you're not in the US, you got a different car, no clue what is in that). its also 1", if you get a manual trans version, the reservoir has the nipple for the clutch master.
so i ran across a potential alternative/substitute - the 98-2002 626 (the USA got its own version, so if you're not in the US, you got a different car, no clue what is in that). its also 1", if you get a manual trans version, the reservoir has the nipple for the clutch master.
That is interesting.
A few months back my 10-ish year old 929 MC needed replacing/rebuilding.I reached out to Ray, and Ray says they have been discontinued for a while. He couldnt even get a rebuild kit. If Ray Crowe cant get one chances are no-one can get one and i am not buying it that Atkins has 973 pieces in stock LOL. I was looking for a generic rebuild kit but I ended up getting one from a friend that he had one laying around for many years. I will eventually rebuild my other one
I will look into this option for a future reference but if that works, that would be a really good option.
I am in the US but my car is overseas. i might bring it over when it becomes 25 .
I am scratching my head at this one. A quick search on Rock Auto shows they have 929 master cylinders for close to the same price as 626 master cylinders and they are still in stock. Maybe there are no brand new from Mazda units, but there are plenty of rebuilt units out there and that is what I would assume the Atkins' units are. OP has a good find, but you can still do the old 929 trick.
I am scratching my head at this one. A quick search on Rock Auto shows they have 929 master cylinders for close to the same price as 626 master cylinders and they are still in stock. Maybe there are no brand new from Mazda units, but there are plenty of rebuilt units out there and that is what I would assume the Atkins' units are. OP has a good find, but you can still do the old 929 trick.
The units from mazda as far as i know were always remanufactured. they might have offered a brand new version at some point in time but not in the recent years. I could be wrong. you cant even get that anyway
If i were to guess, Atkins are branded as oem but they are probably an aftermarket variant of some sort and probably 3x more expensive and who knows what you are actually getting
Personally i want to stick to an OEM MC and if its rebuilt, i want oem internals and i do not want to disassemble it to machine it
it gets tricky, we know Mazda always uses 10x1.0 threads, and we know that they have like 3 master to booster patterns (the old stuff, which is vertical, FC and later is horizonal, and then with ABS they have a bigger diameter with the o ring)
when you get away from Mazda, those things change. i found a Ford master that was 1", but it had two fittings that were 10x1.0 and another that was 15/16"...
I assume people that do the swap are using the reservoir that comes on the 626 MC? No issues with it being slanted, not getting enough fluid in the reservoir for the clutch?
so i ran across a potential alternative/substitute - the 98-2002 626 (the USA got its own version, so if you're not in the US, you got a different car, no clue what is in that). its also 1", if you get a manual trans version, the reservoir has the nipple for the clutch master.
Where did you find a manual 626 with a 1" MC? Everything on Rock Auto shows 15/16" (0.938") MCs for all year 626s.
Where did you find a manual 626 with a 1" MC? Everything on Rock Auto shows 15/16" (0.938") MCs for all year 626s.
I thought I saw it on Rock Auto but maybe not. One of the sites I looked at said 1" bore, and it is. You can tell when comparing to the stock MC. EDIT: for 2002, most of the cylinders listed on Rock Auto say they're 1", aside from Raybestos and Beck/Arnley.
Last edited by speedjunkie; Jan 11, 2023 at 08:45 PM.
