I have a 91 NA. I've replaced the slave cylinder in the past and had no problem bleeding it. Not this time.

I replaced the slave cylinder again recently (the first one lasted 50K and was cheap so I'm not complaining) and I cannot seem to bleed it. The screw is either closed or wide open. This is with just a small turn. I'm getting fluid and air coming from the threads around the bleed screw. Could this be a bad NEW cylinder or a stripped screw? I've bled plenty of brake systems and never had this problem.

What can I use to seal the threads and still allow me to open the screw to bleed the system?

 

Bump -- any ideas?

 

Buy some of the goo from the speedbleeder people that you put on the threads of your screw to seal the threads when you back it out. Or just replace the bleeder screw with a speedbleeder screw. BTW, SummitRacing.com has a good price on them. Sorry, don't recall the size needed. You may have to remove the screw and use a thread gauge to measure it.