seized stud

[jonela]

My truck is off the road at the moment, so I have been re building another Bike. A Yamaha XV 535 and I am struggling getting two of the exhaust studs out . Two came out willingly the other two are well and truly stuck. I have tried heating with a blow lamp, only managed to snap one off, Tried welding a nut on won't budge and the other will snap I fear,well soaked with penetrating oil !
Anybody got any good ideas as to how to get them out ?

 

[jonela]

other side

the other one

 

[Blocky10]

Ricks your man for this I reckon. I bet he's got some concoction of fluids he uses. :thumb2

I would have done what you've already done then started drilling

 

[jonela]

Ricks your man for this I reckon. I bet he's got some concoction of fluids he uses. :thumb2

I would have done what you've already done then started drilling

This is true, I usually just pm him, but I thought I would give the rest of you a chance lol :augie

 

[terranosaurusdoug]

Try freezing it....
https://youtu.be/rljUld-ptvI

 

[Thomas61]

Hi,

Never tried this or know what damage it could cause but stumbled across this thread a while back.

http://www.nissan4x4ownersclub.com/forum/showthread.php?t=28234&highlight=piss

 

[terranosaurusdoug]

Hi,

Never tried this or know what damage it could cause but stumbled across this thread a while back.

http://www.nissan4x4ownersclub.com/forum/showthread.php?t=28234&highlight=piss

In this thread Rick says cellulose thinners is good for ali corrosion, I presume the head/cooling fins etc. is ali?

 

[jonela]

Try freezing it....
https://youtu.be/rljUld-ptvI

great trick, ideal for fitting bearings,but I think the cold would make it more brittle and more prone to snaping

 

[terranosaurusdoug]

great trick, ideal for fitting bearings,but I think the cold would make it more brittle and more prone to snaping

It may break the seal so to speak, like heating (which I know you've tried), it's the corrosion betwixt steel and ali that has probably fused the bolt to the head!

 

[Terrano Steve]

http://www.nissan4x4ownersclub.com/forum/showthread.php?t=27471
I have had a lot of success welding nuts on to broken studs to remove them, unfortunately I no longer have the pictures they were on photo bucket. I have removed them from various castings gearboxes transfer boxes etc & I have removed them from alloy heads & manifolds as well.
It doesn't always work on the first attempt especially if you have a bit of stud sticking out as the heat doesn't get in to the thread.

 

[solarman216]

Not sure what your head is made of but be wary of freezing it locally as it could crack it, if Ali cellulose thinners, if iron repeated heating and cooling with penetrating oil, as it cools if flooded with oil the oil gets drawn into the threads, also holding the head in your hand (to avoid shock damage) strike the end of the stud with a light hammer several times as well as the heat or thinners treatment, Rick

 

[Terrano Steve]

For the one in your second picture which looks to have broken below the surface of the barrel you can build up with weld exactly as I did in the post I have linked above, once you have it flush with the surface you can weld a washer to it if it is easier than using a nut.
Keep the welder turned up lots of heat & short bursts be careful where you earth & don't let any weld splatter get inside.