Brake bleeder screws leaking

[Ma13tt]

I recently had my Stoptech calipers rebuilt. Now a few of the bleeder screws are leaking. I will attempt to clean them out with a brush. Has anyone tried a hydraulic thread sealer?

[Randall921]

It’s not the threads that do the sealing on a bleed screw, it’s the tapered end. Bleeder screws are cheap and easy to replace if they’re corroded. I just replaced mine when rebuilding my Stoptechs.

https://racingbrake.com/one-piece-rotor/geo/cp-bv-k

[Ma13tt]

Thx for the info. I’m a little concerned because these are all new bleed screws. I will order some new screws and swap them out to start. Hopefully this fixes the problem.

[Randall921]

Maybe there’s some crud inside the caliper where it seals. I used a compressor to blow out the bleeder screw holes and it was a little nastier than I would have liked. That along with new bleeder screws survived a track event without leaking.

To be clear, I blew them out before they were on the car full of fluid.

[Ma13tt]

lol. Yes blow the calipers out when they are off the car not full of fluid. Lol. No dumb questions or statements. Making sure everyone on the same page. Thx

[eacmen]

I just went through this with OEM calipers. PITA. I also went through it with ST40s a couple years ago. Make sure you bought the bleeders from a reputable source - like Zekhausen.

If you got then powdercoated or painted make sure nothing got into the seat.

Clean the seat. Mine were not that bad. Just some WD-40 and cotton swabs. If i had a brush that small I would use it. Gun cleaning kit might work. Since they are aluminum dont use steel to clean it.

If that doesn't work. Take the old bleeder. File off the threads so it will fit into the hole without threading. Get a very mild abrasive paste ( valve lapping compound ). And work the seat STRAIGHT with the old bleeder and a little abrasive. Don't man handle it just want a clean surface.

[Ma13tt]

Thank you so much. I appreciate it. I will give update when I can. Once again thx.

[Ma13tt]

I just went through this with OEM calipers. PITA. I also went through it with ST40s a couple years ago. Make sure you bought the bleeders from a reputable source - like Zekhausen.

If you got then powdercoated or painted make sure nothing got into the seat.

Clean the seat. Mine were not that bad. Just some WD-40 and cotton swabs. If i had a brush that small I would use it. Gun cleaning kit might work. Since they are aluminum dont use steel to clean it.

If that doesn't work. Take the old bleeder. File off the threads so it will fit into the hole without threading. Get a very mild abrasive paste ( valve lapping compound ). And work the seat STRAIGHT with the old bleeder and a little abrasive. Don't man handle it just want a clean surface.

I took your advice. I filed off the threads and went to work. As of right now, no leaks. Thank you very much. Someone with a lathe should make these threadless bleed screws for the different brand of calipers. Thanks again.

[eacmen]

I took your advice. I filed off the threads and went to work. As of right now, no leaks. Thank you very much. Someone with a lathe should make these threadless bleed screws for the different brand of calipers. Thanks again.

Glad I could be of service. That is what this forum is all about. Any other issues just post it!