Removing Twisted Exhaust Studs

[Zac Weidner]

Thought I would share a good tool I came across this week, which hopefully will save someone else a bit of frustration. While doing the annual on our Twin Comanche, we had to remove the exhaust stack from two cylinders to replace the gaskets due to a slight exhaust leak, and we ended up twisting off a stud on one of each of the two studs on two different cylinders. Yikes, we thought. We decided to order a tool I found online and give it a try before resorting to removing the cylinders. It's one of the few specialty tools I've ever found that actually work like they claim. It definitely was worth the $15 and waiting a few days. Soaked them in Kroil every day while waiting for the tool, and between the two things, they're out and new studs in already.


https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[Jim]

Hi Zak,

How little stud remant can it grab?

[wyandot jim]

Hi Zak,

How little stud remant can it grab?

Yea I always try and break them of flush so they are impossible to get out. Even a Not So Easy Easyout will not get them out

[Cub Junkie]

I have one of those stud tools. It takes a pretty good size nub to work. I've had my best luck with reverse spiral drill bits.

[Zac Weidner]

It says it works with down to a 1/4" stud up to 3/4". I'll agree that it takes a decent amount of stud sticking out. We probably had 3/8" of a nub to work with. It definitely wouldn't be the magic stud-remove-all tool, but it's a good one to have in the toolbox. Seems the exhaust studs like to rust down thin in the same spot and that's where they break easiest, about 3/8" from the exhaust port face.

[piperrocks2013]

It says it works with down to a 1/4" stud up to 3/4". I'll agree that it takes a decent amount of stud sticking out. We probably had 3/8" of a nub to work with. It definitely wouldn't be the magic stud-remove-all tool, but it's a good one to have in the toolbox. Seems the exhaust studs like to rust down thin in the same spot and that's where they break easiest, about 3/8" from the exhaust port face.

Had a similar problem. Used a set of good vice grips and a Propane Torch to heat the casing around the stud for it to break loose.


Jared

[walt.buskey]

I've also had generally god luck with those stud removal tools.

[JPerkins]

I've always liked the welded nut procedure. Let it air cool until it is COLD and it will usually screw right out. The fun ones are the studs and bolts that break off flush. That case I weld a washer on first as it give you a chance to get good penetration into the stud or bolt shank. Then weld a nut to it.

[Steve Pierce]

This is the tool I use.

Exhaust stud tool.jpg

[andya]

Not much of a picture Steve!