Slave Cylinder Seals

[AussieSpeed3]

Gday all,
I’m probably flogging a dead horse with this as I know it’s a common issue, but slave cylinder (CS) is leaking from where the hydraulic hose goes into it.
ive seen multiple people mention different rubber seals, that are inside the SC and on the hydraulic hose connection.
My local Mazda said it’s missing an O-ring in the hydraulic line clip, but all the threads I’ve seen don’t mention an O-ring, but another rubber seal that slips over the end of the hydraulic hose and clips onto the black plug.
Is anyone able to show a breakdown of what seals there should be from the hose and into the SC? There’s two different rubber grommets in the SC, not sure if it’s missing another one or not.
Car is an 06 Mazda3 MPS.
Cheer fellas, any help would be appreciated.

 

[Cfoldone]

Mine is a 07 speed 3. I bought a non oem and forgot to remove the old oem SC square sided o-ring... it is first in and last out when you remove the hard line piping. So when I installed into the new one was pivved with leakage during system bleeding. I kept the old oem one until I was done with replacement and picked out the square sided o-ring in bottom of the pipe bore area. That o-ring is compressed by being on hard line, down inside a taper bore, that is compressed and held in place by odd multi surfaced hard rubber (Plastic? but hardened by brake fluid?) "cork" that is pushed into SC body and the horse shoe shaped retainer circlip is pushed into place. Still after all that, not much confidence in long term... A real weird assembly line time saver but not for the mechanic. Hope this helps.

 

[JohnnyTightlips]

This is the firewall side but it is more or less the same on the slave cylinder side. That pink is an ORING.


I cut my line and turned it into an 3an so I could run a stainless line to the slave. It's all in my build thread. https://mazdaspeeds.org/index.php?threads/johnnytightlips-build-maximum-carnage.7025/

 

[AussieSpeed3]

View attachment 20835

This is the firewall side but it is more or less the same on the slave cylinder side. That pink is an ORING.
View attachment 20836
View attachment 20837

Absolute legends, thank you both so much.


do you know if you can purchase that seal (circled in pink) from anywhere, I’ve been told I have to purchase a whole new line otherwise!

 

[JohnnyTightlips]

Absolute legends, thank you both so much.


do you know if you can purchase that seal (circled in pink) from anywhere, I’ve been told I have to purchase a whole new line otherwise!

I have a feeling you could just get an ORING from a variety pack. A Viton ring kit would hopefully have what you need.

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That kit is at harbor freight too.

 

[AussieSpeed3]

I have a feeling you could just get an ORING from a variety pack. A Viton ring kit would hopefully have what you need.

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That kit is at harbor freight too.

View attachment 20838

Awesome, saves the $200 I’ve been quoted!!

 

[AussieSpeed3]

G’day all.
Update on repair for anyone with similar issues!!
Picked up some new seals, which fit perfectly, for roughly $30AU posted.
https://www.vagparts.com.au/products/1k0798741-gasket-set
(didn’t need the O-ring, just the other grommet).
Shipped within 3 days of ordering, so can’t complain.
Saved needing to buy the entire hydraulic line again!!

 

[Cfoldone]

Excellent, glad you were able to repair. Thank you for the update too.