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Old 05-17-2011, 08:36 PM   #1
stil2stock
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Default stripped bleeder thread in Brembo...will this fix work?

Long story short, the bleeder screw threads in one of my rear brembo calipers stripped while removing the stock screw (to install speed bleeders).
Will this work as a fix?:
http://www.pegasusautoracing.com/pro...asp?RecID=5210

Or is 1/8NPT going to be too small? Has anyone used that? Any other suggestions (other than replacing the caliper, obviously)?
I guess I'll be trying to find a machine shop that's open this weekend.

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Old 05-17-2011, 10:31 PM   #2
kpluiten
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I just recently did this. 1/8 NPT is borderline. My hole got ovaled out due to some lousy machine work to remove the bleeder so I had to step it up to 1/4 NPT. And at 1/4 NPT, there was basically NO meat left around the hole. Furthermore, the tap was too long and it bottomed out on the bottom of the hole before it made the hole wide enough to fit the insert. I had to cut/grind the tap down little by little until I could expend the hole enough and not bottom out.

When I was done, I could only thread the 1/4 NPT in just about 3 whole turns. It wasn't much, but due to it's taper, I didn't want to force it in too far and break the caliper casting. I had a friend do this and he ended up welding the hole shut and just turning the caliper around to bleed it out. It worked fine for him so keep that in mind.

Before I tightened it down, I put highpressure thread sealant (not locker, but sealant) on the threads and let it cure. It's removable in the future if need be. I now have a couple thousand miles on this setup and it is working fine. No leaks or anything.

My advice would be to drill out that bleed screw AS CAREFULLY as possible and see if you can do a 1/8 NPT unit. If not, try the 1/4 NPT as a back up. If both fail, weld it up and redrill or just bleed it off the hub like my buddy.

also, shop around for those things. I bought both 1/8 and 1/4 units for like $2.80 each or something. I also bought taps for each and had to modify one like described above. Lastly I paid for some drill bits and high pressure thread sealant.

It works. Enough said. Feel free to PM me for questions. I'm happy to help.

Posts from my build thread:

Quote:
So, nothing terribly exciting, but I did get some stuff in the mail today.

First up I got the Thexton Bleed screw repair kits I ordered for one of the front Brembo calipers. During rebuild, the bleed screw was frozen and ended up snapping off flush with the caliper. Not good. Turns out there is a very specific way of removing frozen bleeder screws so that they do not break that involves inserting a hardened metal dowel pin in the hole on the center of the screw. This prevents the fitting from collapsing in on itself when you apply great torque. Too bad I found this out after to broke. The threads came out stuck on the bleed screw.

Either way, I ordered one of each size they make as I was unsure of how what size I really needed. They were ~$3.00 each. Cheap if they fix the issue. In a nutshell, you drill out the hole and thread it with 1/8 or 1/4 NPT.

Here is the kit opened:


Here are the kits compared with a stock sized speed bleeders for size comparison.
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Old 05-17-2011, 10:34 PM   #3
kpluiten
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Here you can see the repair installed. Not pretty, but it works.



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Old 05-17-2011, 10:42 PM   #4
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Here is a cheaper source:

http://www.toolsource.com/18in-disc-...r-p-54436.html

The manufacturer so you can search for it is Thexton.
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Old 05-17-2011, 10:42 PM   #5
stil2stock
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Thanks for the reply. Actually, my stock bleeder screw came right out, but when I tried to put in the new one I found there were no threads left. So hopefully I can just tap for the 1/8NPT.

Also, I'm not sure if you knew this, but....your calipers are green. And I've never seen a set so clean....they're beautiful, haha
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Old 05-17-2011, 10:47 PM   #6
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Yeah, it thats the case, then you should be able to do the 1/8 NPT. I'd send you mine, but I'm moving right now and I fear it's lost in all the packing.

And thanks for the compliment. I'm pleased with how they turned out, but I can never seem to capture the true shade of green they are. They look much better in person.

There are better pictures in my thread: http://forums.nasioc.com/forums/show....php?t=2061849 (I pimp this thread A LOT, sorry)
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Old 05-17-2011, 10:56 PM   #7
stil2stock
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Quote:
Originally Posted by kpluiten View Post
Yeah, it thats the case, then you should be able to do the 1/8 NPT. I'd send you mine, but I'm moving right now and I fear it's lost in all the packing.

And thanks for the compliment. I'm pleased with how they turned out, but I can never seem to capture the true shade of green they are. They look much better in person.

There are better pictures in my thread: http://forums.nasioc.com/forums/show....php?t=2061849 (I pimp this thread A LOT, sorry)
awesome build. The OCD side of me is ABSOFUKINGLUTELY in love with how clean your car is. Mine is a disaster of corrosion, rust, grime, brake dust and the blood of my enemies.

OK, so I just need to find a shop that's open on saturday and can tap for 1/8 NPT
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Old 05-17-2011, 11:02 PM   #8
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Quote:
Originally Posted by stil2stock View Post
Mine is a disaster of corrosion, rust, grime, brake dust and the blood of my enemies.
Best line I've seen on NASIOC in a while.
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Old 05-17-2011, 11:04 PM   #9
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Quote:
Originally Posted by kpluiten View Post
Best line I've seen on NASIOC in a while.
*takes a bow* I was pretty proud of it myself. It's now on my twitter (@Cone_Eater) and facebook status.
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Old 05-19-2011, 08:47 AM   #10
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Anyone else? I ordered the 1/8 NPT fix kit with speedbleeder and I'm going to work on that this weekend.
I can't believe how much corrosion these calipers have for an 06.
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Old 05-21-2011, 01:47 PM   #11
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update: I went to a little machine shop today, and the guy didnt even try. His 1/8NPT tap was too long and tapered, so it hit the seat inside before grabbing anything. I got frustrated and decided to try it on my own, and bought a 1/8NPT tap bit. At this point I already figured it was a lost cause and I needed new calipers, so I stuck the tap in my drill and aggresively tried to rethread the hole, hehe. Well, it kinda looked half-decent, so i tried threading in the fix kit thingy. the first mm or so of the hole was too corroded wide and didnt have much in the way of thread, but as I turned in the fix thingy, to my wild surprise, it grabbed further down, and seemed to thread in really easily with just a box wrench on it. I threw some thread sealant with teflon on the threads and tightened it down as far as it would go.

It kinda maybe seems to have worked! But now I'm afraid it's gonna leak/completely blow out while I'm on VIR or something and kill me dead forever. Is there a way to test the thing for seal? Or should I just put it on the car and drive around town carefully for a couple days? anyone? bueller?
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Old 05-21-2011, 04:25 PM   #12
stil2stock
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It didn't work. leaking all over on first test. Oh well, guess I'm getting a new caliper. Anyone know where I can find one?
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Old 05-21-2011, 10:23 PM   #13
kpluiten
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You could try having it welded shut. You have to bleed it unbolted to the hub, but it can definately be done. Amroof on here did it with great success.
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Old 05-21-2011, 11:15 PM   #14
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I had to do the same thing for mine. The trick is you need to take the tap that has the tapper and cut the taper of. Basiclly makeing it a bottoming tap. This way you can get more threads tapped. Its harder to get started but it works. You could always start it with a tap that has a taper and then switch to the tap with the taper cut off. It has been working for me for the last 3 years. No problems.
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Old 05-22-2011, 04:58 PM   #15
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Yeah, I read this about 3 weeks ago. And I was bleeding my Brembo's and now I have a stripped nut only. Does anyone have some feedback if I should get oem replacements or speed bleeders? also how do speed bleeders work?
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Old 08-07-2015, 02:36 AM   #16
hybrid gti 2
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Holy old thread but will this work if the caliper nipple seat was drilled at all?
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Old 08-07-2015, 05:45 AM   #17
lukethedork
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Quote:
Originally Posted by hybrid gti 2 View Post
Holy old thread but will this work if the caliper nipple seat was drilled at all?
Will what work? Tapping a new thread? Yes.
It is common to drill a hole before tapping threads.....

More on this 'Holy old thread' **** that is talked about on all forums. Just because we live in a face paced world of technology and cars does not make a 4 year old thread old or irrelevant. If a book was 4 years old would you dismiss it as outdated and useless information? Better stop reading those race car engineering books...............
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Old 08-07-2015, 09:59 AM   #18
hybrid gti 2
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What I was trying to understand is how it works. Does it used the existing seat to make the seal or does it have its own seat? Trying to save a caliper.
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