Stud tool

chris snell

Administrator
Callsign: NW5W
Staff member
Is there a good tool for inserting and tightening studs (think exhaust manifold studs)? I seem to remember using one at Brian's @DefendersNW shop but I can't remember the exact details. I see a stud remover in the Snap-on catalog. Can those be used for inserting studs? What's the right way to do this?
 

chris snell

Administrator
Callsign: NW5W
Staff member
I have always used two nuts snugged against one another and a wrench to spin it in . Then two wrenches to remove the nuts leaving the stud
I did that but I didn't like what it did to the threads. I'm pretty sure there is a better way.
 

jymmiejamz

Founding Member
Callsign: KN4JHI
I have a kit that looks exactly like this, but it is not made by Gearwrench. I thought it is made by Lisle, but that didn't turn up on Google. It works well, but if a stud is seized, you still need heat otherwise it will snap.
 

David despain

New member
Callsign: KF7PAL
Chris I think you want one like this. It has the correct thread pitch. The jam nut tightens down on the collet to provide a lot of holding power to turn it in or remove the stud. You need a fair bit of room to make them work well.

 

RDavisinVA

Well-known member
On exhaust studs, you often need to heat the manifold around the stud red hot to retract the stud.
The other option is to break the stud to get the pipe loose and have a machine shop mill out the portion left in the manifold.
The stud removers mentioned by David and David work well.

Since we do a lot of custom exhaust, I always make a short down pipe held to the rest of the exhaust by triangular 1/4" steel flanges.
One side is tapped for 3/8 NC bolts.
That way you can remove the engine or exhaust without touching any of the manifold studs which are often frozen in place.
 
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David despain

New member
Callsign: KF7PAL
I'm not trying to remove studs, guys; I'm trying to set them without damaging the threads.
A slightly different style but still same concept. I don't have any experience with this one. It looks like this one might not require quite as much clearance. Although I have used that other style I posted above for both install and removal. they do exactly what you're after.
https://store.snapon.com/Stud-Remover-Sets-10-pc-Metric-Stud-Remover-and-Installer-Kit-P884754.aspx
 

waveridin1959

Well-known member
I removed my manifolds since i broke the studs taking them out. I then installed the studs on the bench using the two bolt method to insure they were well seated. I also really hate these studs.
 

RDavisinVA

Well-known member
Tap the hole.
Coat the stud threads with anti-seize and tighten them down with a stud tool that doesn't make contact with the threads.
 
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