Topic: exhaust flange studs fell out -- should I use threadlock?

[Hondawggie]

on my #1 cylinder on my 1980 cb900custom, I removed the header for cleaning and the 2 studs that the exhaust flange attaches to unscrewed from the head (the exhaust flange nuts were sticking).

My plan:
1) put 2 nuts on the exhaust flange so I can screw in then use the outer nut against the inside nut to tighten up the exhaust stud into the head

2) and before putting the stud in, cover it with Thread lock.

Correct?  I've never done this before, never had an exhaust flange stud come out the head like that.

[Hondawggie]

So based on the opposite discussion currently up on the board, ie. trying to remove a stripped exhaust flange stud -- which sounds dicey what with 'high heat' and 'smoke' and 'capillary action' and 'rapid cooling' -- sounds like DO NOT USE THREADLOCK FOR EXHAUST FLANGE STUDS they're hard enough to remove as it is......

.....or did I over-read the thread on removing a stripped exhaust stud?

[MCRider]

Rather than using a lock on the studs, as you may want to get them out someday, I'd use an anti seize on the nuts. If its too late, I'd still use the anti seize on the nuts and just ride it.

I always liked the CB900C.

[Hondawggie]

Rather than using a lock on the studs, as you may want to get them out someday, I'd use an anti seize on the nuts. If its too late, I'd still use the anti seize on the nuts and just ride it.

I always liked the CB900C.

I had not heard of 'anti seize' -- it sounds like the exact opposite of threadlock.  Which brand or product is good for this?  I waited to hear back from the forum before putting those studs back in.  Should I put the anti-seize on the studs before installing them?  You only mentioned putting it on the nuts above so I'm wondering if you'd also recommend putting it on the studs too....and thanks for the tip. 

[MCRider]

Rather than using a lock on the studs, as you may want to get them out someday, I'd use an anti seize on the nuts. If its too late, I'd still use the anti seize on the nuts and just ride it.

I always liked the CB900C.

I had not heard of 'anti seize' -- it sounds like the exact opposite of threadlock.  Which brand or product is good for this?  I waited to hear back from the forum before putting those studs back in.  Should I put the anti-seize on the studs before installing them?  You only mentioned putting it on the nuts above so I'm wondering if you'd also recommend putting it on the studs too....and thanks for the tip.  

Anti-seize is commonly used and readily available at auto parts stores. Its primary use is when threading say a steel screw into an aluminum thread. Otherwise there is a chemical process which occurs that binds the two together. Especially if its stainless steel screws. But you'd use it on anything you may want to take apart later.
http://www.permatex.com/products/automotive/lubricants/specialty_lubricants/Permatex_Anti-Seize_Lubricant_a.htm

Your studs shouldn't have backed out with the nuts, but seeing as how they did, no harm done, eh?  At this point, yes I would use it on the stud as it enters the head, and on the nut threading onto the stud. Check them occasionally to see if they loosen up. The stud should be tightened pretty good, but the nut should only be as tight as it needs to be to keep the exhaust from leaking. Use new exhaust gaskets. Check them occasionally for loosening up.

PS: A little back ground. Your nuts had probably seized to the stud, turning the stud out.

http://www.sacskyranch.com/antiseize.htm

[ford_73]

Dip the threads in Maalox or any other liquid antacid it will do the same thing as anti seize.