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Post by dav3titus on Aug 30, 2017 6:13:55 GMT -5
Hey all! So....I broke an exhaust stud on my 150- whats the best extraction method?
Thank you
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Post by oldgeek on Aug 30, 2017 6:33:48 GMT -5
Even if it broke off flush, you can weld a nut to it and it should come out. Then there is always the drill and extractor, but be careful going that route. Breaking off a hardened extractor or drill bit and then trying to get that out is a nightmare.
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Post by badpumpkin on Aug 30, 2017 9:32:01 GMT -5
My answer is always reverse drill bits from auto parts store. As they drill in reverse they will usually back the screw or bolt out.
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Post by ThomasTPFL on Aug 30, 2017 10:22:07 GMT -5
If you drill it I'd suggest using a round burr on a Dremel to first carefully make the top of the stud concave then center punch it to help you drill straight.
As long as you don't make the hole horribly off center worst case scenario you can always put in a thread insert or go to a slightly oversized stud.
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Post by dav3titus on Aug 30, 2017 20:04:26 GMT -5
So...... I don't necessarily have to pull/replace the head?
that would be cool.
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Post by jackrides on Aug 30, 2017 22:14:02 GMT -5
Take your time and be accurate. You'll be fine.
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Post by dav3titus on Aug 30, 2017 22:42:11 GMT -5
Well, I didn't have any success with the EZ-out. Which means- my options are-remove the head n try to take out the stud or just get a new head, right? If I go that route (and I probably will) what numbers do I need to get the right head?
My scoot is a 150 GY6. Not interested in mods, upgrades, etc. I desire high gas milage and stability.
Thanks you guys
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Post by AtariGuy on Aug 31, 2017 0:05:11 GMT -5
Quality for a few bucks over those cheap chinesium heads, get a glixal head. Or remove the head and have a local mechanic tap the bolt out...
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Post by jbjhillbilly on Aug 31, 2017 2:47:33 GMT -5
If there is still some meat sticking out, cut a straight slot across the top and use a flat-head screwdriver. Or JB Weld a bolt on and come back in a day (make sure you degrease first)
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Post by pinkscoot on Aug 31, 2017 18:18:33 GMT -5
Well, I didn't have any success with the EZ-out. Which means- my options are-remove the head n try to take out the stud or just get a new head, right? If I go that route (and I probably will) what numbers do I need to get the right head? My scoot is a 150 GY6. Not interested in mods, upgrades, etc. I desire high gas milage and stability. Thanks you guys Be careful when ordering the head for a GY6 150 there are several versions out there. Mo on Scrappy does does a good job of explaining the differences. Here is a link, just follow down to his explanation. |
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Post by AtariGuy on Aug 31, 2017 21:18:22 GMT -5
Theres always the torch and twist method, or the pb rust blaster overnight soak, but it still depends on how much of that stud is left...
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Post by dav3titus on Sept 1, 2017 20:46:54 GMT -5
the stud is broken off inside the head.
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Post by jackrides on Sept 1, 2017 22:41:30 GMT -5
If you want to keep the head, drilling the stud out and rethreading is the way. The center of the stud needs to be flat so you can find the exact center. A bushing is needed that just fits into the stud hole and has a hole thru its center to just fit your center punch. Your center punch can be quite small. Drill a small hole in to the stud. Then gradually increase the drill size until you can gently force a screwdriver into it. Remove the screwdriver and spray some high quality penetrating oil in to it and let it soak over night. If you have to drain the gas and turn it upside down, so be it. try the screwdriver again. If it doesn't work, buy a rethreading kit. Helicoil is a popular and reliable brand. The kit will specify the size to drill out the stud. Do that and follow the directions. Or, find a new head.
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Post by jeff84 on Sept 1, 2017 22:48:47 GMT -5
I have had a hell of a time removing even an intact exhaust stud. vise grips and a torch with the head in a vise type of hell of a time.
I have also had them come out with the nut before.
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Post by ThomasTPFL on Sept 2, 2017 1:18:47 GMT -5
I'd use this as an excuse to buy a performance head.
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