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Old 02-07-2013, 10:05 PM   #1
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Smile Broken Exhaust stud repair

Broken exhaust stud repair.



I had a cylinder head come to the shop, it had a bad drilled exhaust stud.
Whoever tried to remove the broken stud before, did not do the best of jobs.
Part of the old stud was still in the hole. Along with part of an EZ out.




I took a die grinder with a carbide burr and ground out the stud and EZ out.
I was left with this for a hole., I knew a simple Heli-coil would not fix it.


So I made a bushing to repair it.

The head casting was dilled and tapped for a ˝ x 13.






Next I installed a set screw. You could also use the threaded part of a bolt.



Use “Green locktite”


After about an hour, the locktite is set up. Drill the set screw .2660, then tap for 8mm x 1.25


Next fit the stud.



The customer should not have any exhaust alignment issues of the exhaust manifold now.



Attached Thumbnails
Broken Exhaust stud repair-036_zpsb21a3f9e.jpg   Broken Exhaust stud repair-037_zps7c314eb4.jpg   Broken Exhaust stud repair-042_zps496e99d4.jpg   Broken Exhaust stud repair-039_zpsc13a1857.jpg   Broken Exhaust stud repair-041_zps8ab285ad.jpg  

Broken Exhaust stud repair-044_zps017ab31b.jpg   Broken Exhaust stud repair-045_zpsd98ce422.jpg   Broken Exhaust stud repair-047_zpsbd2b55b0.jpg  

Last edited by BogusSVO; 02-08-2013 at 11:02 AM.
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Old 02-07-2013, 11:41 PM   #2
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Another bauce thread from a buace.
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Old 02-08-2013, 04:22 AM   #3
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good job, looks good. Whenever i see part of an ez out/reverse drill stuck in the hole, i usually call it time of death.
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Old 02-08-2013, 12:05 PM   #4
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Green loktite. Never heard of that. Properties?

Cool stuff. Thanks.
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Old 02-08-2013, 12:15 PM   #5
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Green Locktite

tl;dr it wicks into small spaces
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Old 02-08-2013, 12:30 PM   #6
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Wow. That's really cool. Thread penetrant with locking and sealing properties. Claims that the fasteners don't even need to be taken apart prior to application. I need me some of this.

Props to all!!
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Old 02-08-2013, 12:33 PM   #7
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Quote:
Originally Posted by hornetball View Post
Green loktite. Never heard of that. Properties?

Cool stuff. Thanks.
Quote:
Originally Posted by thenuge26 View Post
Green Locktite

tl;dr it wicks into small spaces
Well it is not loctite brand, but Permatex brand

Threadlockers : Permatex® Penetrating Grade Threadlocker GREEN
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Old 02-08-2013, 01:17 PM   #8
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Loc-tite, for loc'd up machinists.
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Old 02-08-2013, 09:05 PM   #9
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I normally use the green loctite for thread locker when using inserts.
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