Retapping a stud hole?

[soyee7]

One of the exhaust manifold studs broke today when i was pulling off the manifold. I was wondering if i drill and retapp it if the stock size stud will fit or if i will have to get a larger one. Also if you guys have any advice on this let me know. what have you all done when you break a stud, and if youve taken it somewhere how much did they charge to retapp it.

[kjewer1]

Drill the onld stud out. Then helicoil the hole. The helicoil size is M8x1.25, same as the stock stud thread size. If you get the kit it will come with a drill bit, if not, you need a 21/64s bit to make the tinal hole. Get the 30 dollar kit, its easier.

So drill out the stud. Make the final hole at 21/64s. Thread for the helicoil insert using at least medium strength loctite. Thread it in. Let the locktite set. Use a scredriver or punch to bust off the "tang." Thread in the new stud.

This is a VERY common problem, and this is a common procedure. Hope that helps.

[soyee7]

thanx a lot,ill give it a try