Topic: Broken stud

[prince_ruben]

I just broke a stud for the exhaust headers on a recently acquired motor (the motor was removed then fell forward) . Do you guys know of any method or service to replace the stud?
Thanks.

[Gordon]

The exhaust studs are just screwed into the head.  Unscrew it and replace with a new one from Honda. 

[prince_ruben]

Do I need to heat up the head to access the broken stud? If so, what MAP gas or propane? Thanks.

[Gordon]

Do I need to heat up the head to access the broken stud? If so, what MAP gas or propane? Thanks.

I don't understand your question.  Did the stud break off flush with the head or is there still some sticking out?

[prince_ruben]

Do I need to heat up the head to access the broken stud? If so, what MAP gas or propane? Thanks.

I don't understand your question.  Did the stud break off flush with the head or is there still some sticking out?

I added a pic!

[BVCB650]

You're going to need to drill that and use an ezeout. Soak that sucka well with penetrating lube, and make sure you get the hole deep enough. Not deep enough will not allow the ezeout to go in enough and you risk snapping that sucka off. Then you have real problems.

[young blood]

I'm no expert but I did just have the same problem, I would recommend unscrewing another exhaust bolt just so you get an idea of how deep they go inside the cylinder head. My broken stud came when I started drilling it (since I was using a reverse direction drill bit).

[cb650]

That one looks tricky.  Spray it down as much as you can as long as you want with wd40 or something of your liking.  When drilling for anything use a left hand bit.  Might get lucky especially as it broke from a fall and not overtightening. Some heat on the head will help.

[honda_jason]

i had this same problem with my bike. 3 of the studs snapped inside the motor when i tried taking the stock exhaust off. i drilled out the old stud and had to re-tap them. its fine now but its a pain in the ass and a ton of frustration.

[Bakes]

Been involved with remanufacturing turbos. As you can imagine, the heat generated by a turbo produces many broken bolt / stud issues.
Our method works great - not sure you can get away with it though considering you've only got 8mm opening to work with.

We keep piling up weld on the broken stud until there's enough to clamp onto with vice grips or even a pipe wrench. After the weld pile is large enough, let it cool off then soak with penetrating oil. Go at it with the grips! Very rarely does this process fail.

Problem you have is it's below the surface of the cylinder - not sure you can get in there.

[cookindaddy]

I have the same problem. I came across this on the web today and wondered if anyone had any experience with the Alcoa Recoil Drill out bolt and stud extractor?
Self-centering
anti-clockwise
up to grade 8
http://www.alcoa.com/fastening_systems/commercial/en/product.asp?cat_id=1496&prod_id=1097