dimwittedmoose51

Me, again! Trying to flush brake lines on a 94 100CSQ wagon and darned if both rear brake bleeder screws snapped off while trying to open them up. The front ones came loose relatively easily. No amount of WD 40, 1200 degree heat gun and finally propane was going to free up that rust so my questions are:

1. What's the best method of extracting these little buggers? Can't imagine an easy out gettting the job done. If it won't what size drill bit do I start out with? Does Audi make an oversize bleeder screw setup or am I going to have to buy new rear calipers?? Couldn't find any tech articles on this subject, so if there's a url out there, that would be a big help.

Thanks

Max

tram-man

Well you can still bleed them by unscrewing the brake line to the caliper. I can't remember how the nipple is positioned on the Audi rear caliper but if the nipple is above the piston (and you're sure the old fluid is still in there) it will work. Bit messy though but it's how I used to bleed by bug rear cylinders (the bleed screws always broke). To fix, I guess you will need to drill and tap them but it will be a workbench job and you need a tap without a lead-in as the end of the bleed screw thread needs to go deep in the recess.

dimwittedmoose51

Thanks Tram-man

snowman '92 100

doesn't work though: drill progressively larger holes and you should be able to "break" the old bleeder valve out. Theoretically, you are making the hole in the bleeder progressively larger... eventually so large that the threads are not even attached to anything and can be pulled out (or pried out) with an ice pick or small screwdriver. Make sure you get EVERY last piece.