Brake guys, a quick question please, I hate brakes! Options

[Cheapsnake]

I'm bleeding my brakes and find a leak in one of the rear calipers right at the adjuster screw on the outer piston. I pull the caliper off and take it apart and find that there is no o-ring, gasket or other means of sealing the adjuster screw. It's simply a metal to metal fit and I can't imagine that that's enough to seal.

I've got a rebuild kit and there isn't a seal included for that adjuster screw. There is one for the other piston. So what am I missing here? Is there supposed to be an o-ring or something else to seal that screw? Thanks.

Tom

[Eric_Shea]

Nope, no o-ring. Just get it tight and not cross threaded.

Derpy-Derr. (IMG:style_emoticons/default/biggrin.gif)

I'm going to cut a gasket to fit the boss and put it all back together again with a very tight locking screw.

Double Derpy-Derr!! (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif)

Oddly enough this only happened on the right rear. The left one didn't have this leak.

It will... soon. (IMG:style_emoticons/default/wink.gif)

There's an o-ring on that shaft. I can see it from that bad picture (IMG:style_emoticons/default/dry.gif) (Is that a "Big Red?) (IMG:style_emoticons/default/ohmy.gif)

This happens often and when it does, it means you have a hardened, crusty seal. Your seal is old and compressed. It has hardened and will probably come out in pieces. It probably looks almost like part of the shaft at this point. It resides where you see this shiney seal in this picture:



You need to use a dental pick and get that old, bad seal off that shaft. Then, if you have one, it's best to use a 8x1.25 die to chase the threads, Your 13mm nut likes to get hung up on the clip galley:

(IMG:http://www.914world.com/bbs2/uploads_offsite/a5.sphotos.ak.fbcdn.net-1110-1298144274.1.jpg)

Once that's done, you need to walk a new seal down the shaft and into the seal galley. Kinda like a "Holla-Hoop" falling to your ankles (or a prom dress). Keep the dental pick in there and walk it down:

(IMG:http://www.914world.com/bbs2/uploads_offsite/a3.sphotos.ak.fbcdn.net-1110-1298144274.2.jpg)

Then pop it back in the bore:

(IMG:http://www.914world.com/bbs2/uploads_offsite/a1.sphotos.ak.fbcdn.net-1110-1298144276.3.jpg)

No more weaping from you or your caliper. (IMG:style_emoticons/default/wink.gif)

If you're "really" a cheapskate (or a cheapsnake), you can try to spray a little PB Blaster on it "WHILE IT IS IN THE CALIPER BODY". If you look at the side of the PB Blaster can you'll see they bill it as a "Seal Reconditioner". It's actually just a petroleum based "Seal Sweller" (which is why you want that seal installed before or very shortly after you spray the PB Blaster on it). Your seal will loosen and swell and should stop leaking (for now). By the time it leaks again, it will be the other owners problem. Then we can start a DAPO thread. (IMG:style_emoticons/default/biggrin.gif)

On the bright side... it's only your brakes we're talking about. Might as well experiment with them a bit. (IMG:style_emoticons/default/lol3.gif)