IMHO,
The hydraulic throw out bearing is right next to Osama Bin Laden on my list of my most favorite things in life. We have changed 5 of them out this year already. I am pretty sure we installed them correctly. I am very sure the swollen o-rings (ALMOST TWICE THEIR NORMAL SIZE) was not correct. Yes, we even used the "recommended" brake fluid. Someone put the wrong formula rubber in the o-rings. We called and they "fixed" that problem...yes, and I pulled another 4 OUT after the fix!!!
They are an abomination and I wouldn't defile the ocean by giving them the "deep 6" test.
There, now you know how I feel. I think Jamo's opinion of them is only slightly worse than mine.
David