ACT 6 Puck Slave Cylinder Problem
 

Installed my ACT 6 puck with street lite flywheel last week and have encountered quite the problem. While bleeding the clutch the slave cylinder decided to blow the piston out along with the cap that holds it in. We put it back together and tried the process again. Our theory is that some change in the ACT clutches in recent production has changed, and the clutch fork must move a lot more causing the slave cylinder to hyperextend.

Called a local shop that deals with mazdas alot and they confirmed this and have had this happen on a number of cars they have installed the ACT kit in recently. They are in the process of manufacturing a spacer to go between the slave piston and the fork.

Has anyone else had this happen? Posted this to warn and help make people aware of this problem if they are going to use this clutch.

Wonder if the pedal pressure is lower.

i have the same problem my car is still up in the lift right now!! i am using the ACT Stage 1 Streetlite kit, i have to call act to see what they say. hey u got any info let me know plz.

Every time I have messed with the slave cylinder it ends up needing replacing.

Other than bleeding it if you took it off the car chances are you will need a new one.

I keep a spare one at home just in case. I've had this problem with ACT and SPEC units.

i don't think there is anything wrong with the slave cylinder. it actually extends the rod out too much where the plastic ring that goes inside pops out and then oil comes out blah. i didn't even step on the clutch half way and it already popped it out.

anyone else have this prob ?

Anytime you fuck with these clutches, you need to replace the slave. That's just the way it is.. if you happen to get away with it, it wont be a long celebrated event before it needs to be replaced.

Best rule of thumb, replace the slave or at least have one on hand.

ACT 6 Puck Slave Cylinder Problem
 

Oki so ill go get one from mazda if it will fix this problem. So is this a preventive measure or this will solve my problem?

thanks for giving me something else to worry about. I installed the 6 puck last fall with no issues. still fine after ~3,000 miles. think my slave is on borrowed time? or do you think its just likely to fail whenever I service the clutch?

I'm hoping if it does fail, it fails dramatically. I know that a slave cylinder that just gradually starts to fail and not fully extend can cause clutch failure due to excessive wear and heat...

Mine did the same thing, pushed that black cap/piston back in and bled the system and it has been fine ever since. (crosses fingers)

The problem is when I push it back in it looks like this, it has about a finger gap in between.
Attachment 111194

This is purely anecdotal, but I've done ACT clutch swaps in several cars, including twice in mine. I always unbolt the slave from the transmission and leave the line attached. I've never had an issue with the slave cylinder.

I have over 10,000 miles on my current ACT clutch and several autocross days and countless times hooning.

hmm so ur saying my slave is busted that's why its hyper-extending the rod out?

I just replaced my clutch, we removed the slave but left the line hooked up. Not a single issue. But I have the full face clutch

Full face clutch? i have the act stage 1 streetlite. oh more info Plz.. did you just buy a new clutch kit?

I believe so, yes.

I run the ACT six-puck sprung with Streetlite (steel) flywheel for what it's worth.

I bought it about 2 months ago. Got it with the pro light flywheel. Bought it through kozmic motorsports. Drives like stock with a firmer pedal feel. I would post some links but I'm sitting ina safety meeting right meow.

so is there a special way of installing the slave so it don't get damaged? so pretty much once its installed don't remove the line from it. thanks everyone for all ur info!
going go rent a car & head to work hope mazda has one in stock for me.

the more i look at the pic it seems like the fork some how has to much play so when the slave tries to hit the fork it pops the seal out. ahhhhh damnit why can't it just work

Mazda uses a similar slave in other models as well. They shoukd have it in stock.

Sent via blown passenger side speakers.

Ahhhh special order part !! $130

I think its like half that on rockauto.com.

I've had the same experiences... I've been running my ACT 6 puck for at least 10k miles with no problems.... Keep in mind that the original slave that came with the 1st gen speeds has been replaced by a new revision (with the orange boot) that's supposed to be a better unit. If your slave has the black book, iirc, you're running the older version.

Just buy a new slave like Haltech said and stop trying to 'repair' the busted one...

fyi - reason i have the new slave is because my original black boot slave crapped out like you're experiencing with yours...

Ic thanks for the info I actually have the orange boot we took the slave apart to tickle our brain.
Attachment 111272Attachment 111273
It will be here tomorrow at 12.

My Slave cylinder crapped out on me as well when we were installing my 6 Puck. It was no surprise since the engine had enough crankcase pressure to blow my rear main. :(

My ACT clutch has been problem free for 7,500 miles now and the replacement slave cylinder seems to be working fine.

Just got the part from mazda
Attachment 111462

Dropped it off waiting..

is it the same part # as the one that crapped out?

hey guess what i looked on the side of the box and it said made in Germany !! :P

on the side of the old cylinder it says FTEV DE 6626UR01
the new one says FTEV DE 6858 G1682 01

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This is OLD news with ACT clutches several other members have had this issue with ACT clutches and just in general any aftermarket clutch can cause this. the fix has been putting like a nut between slave and fork and welding it on

i've also email ACT and their reply was:

I've had my R&D review your info and they compared it to an install we did here recently. granted, that was a newer model, but the parts look almost exactly the same.

there is no obvious reason why his fork seems to be further away from the slave cylinder push rod that the OE clutch. there is less then .030" difference in total stack up height when using the act kit.

we would ask whoever installed this to double check the fitment between the release bearing and the fork. we can't see from the supplied images, but maybe the fork fingers are not behind the thrust surface on the bearing carrier?

i've had mine for about 10k now...not a problem. but i guess to each their own.

Damn, do you have a recent pic of your left calf?

Here is mine from a minute ago.

http://img.tapatalk.com/d/13/06/05/mu9ezady.jpg

Oh jelly going to pick up the precious. The Mechanic called and said everything went smoothly and took it for a test drive.


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ACT 6 Puck Slave Cylinder Problem
 

Oh damn it kinda stiff and the grab point is lower but I am so happy it's working and working good. Thanks for everyone and their info & help. And sorry OP I feel like I Hijacked ur thread.


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