Ok, so you did install it first without the spacer. Did you start the bleeding process (pushing the clutch pedal at least) without the spacer before noticing the "mistake" ?
I recently replaced the slave cylinder with a LuK LSC116. I got it from Amazon (
https://www.amazon.com/LuK-LSC116-Cl...ustomerReviews)
One customer posted a review and he mentionned that he forgot to use the spacer. Too much pressure built up within the hydraulic circuit and it blew up the slave cylinder seals. That's why I'm asking
Another possible issue would be that you didn't properly seat the cylinder?s actuation rod in the clutch fork divot. Did you remove the slave cylinder from the transmission housing when performing bleeding and placed it back ?
The rod could get trapped somewhere in between and cannot extend properly. Then, same situation, too much pressure in the hydraulic line and the seals are gone.
If you do not fully lift the car during the procedure it can be difficult to really see where and how you're engaging the slave cylinder rod.
Final reason that I could think of would be a bad part (bad luck)...If you replaced your master cylinder because it was leaking, the slave cylinder is probably about the same age and about to fail as well. I usually replace both at the same time (depends on the vehicule history as well...)
I still have my old slave cylinder, I just tried to pull rod out without success. I don't know if that's also the case with my new LuK (i didn't want to try as it's not meant to be pulled
)
If these scenarios are not valid for you, i'm curious about what the other owners would say
.