decoupe
(deceased)
I removed my exhaust manifold and of the 12 studs 10 came out with the "locking" copper nut. Is there a high temperature version of locktite I haven't seen? Any engine builder secrets?
Thanks
Thanks
Exhaust Manifold Studs
- Thread starter decoupe
- Start date
To unlock Loctite you hit it with a torch.
http://www.useloctite.com/filephotos/documents/LT4985TLCapabilityGd.pdf
High temp goes to 550 or so?
http://www.useloctite.com/filephotos/documents/LT4985TLCapabilityGd.pdf
High temp goes to 550 or so?
Don if i may... never hit it with a torch.
As a Boilermaker / Blacksmith (welder) all my life i was told Never use your torch as a hammer.Never
Light the torch and get a soft flame, slowly heat the head and work your way to the studs. yes they will come out.
your welcome
BG
As a Boilermaker / Blacksmith (welder) all my life i was told Never use your torch as a hammer.Never
Light the torch and get a soft flame, slowly heat the head and work your way to the studs. yes they will come out.
your welcome
BG
LOL!!
Most excellent.
Most excellent.
decoupe
(deceased)
Thanks guys - everything I needed to know.
Doug
Doug
pamp
Well-Known Member
Doug,
When I was doing my pipe show I replaced all the studs except one that was sketchy and did not want to break off in the head, ran a die nut over that one. (double nuts in and out) The stud number was 07 11 9 908 368. I have a ton of the copper nuts in my stock now and had intended to send some on to you, would you like me to do this? They are kind of hard to come by and I used a VW supplier. Me, I would not use lock-tite as I would rather they back out of the head if need be. The expansion of alloy vs the steel stud should lock all in place once up to temp.
When I was doing my pipe show I replaced all the studs except one that was sketchy and did not want to break off in the head, ran a die nut over that one. (double nuts in and out) The stud number was 07 11 9 908 368. I have a ton of the copper nuts in my stock now and had intended to send some on to you, would you like me to do this? They are kind of hard to come by and I used a VW supplier. Me, I would not use lock-tite as I would rather they back out of the head if need be. The expansion of alloy vs the steel stud should lock all in place once up to temp.
decoupe
(deceased)
Pamp,
You did send a bunch of the copper nuts (more than enough) with the down tubes. Thanks for that.
I should use steel nuts while doing the fitting of the down tubes and merge as the copper nuts keeps keep backing the clamp studs (the long ones) out. The long manifold studs are the ones that get the locktite. All the pipes and mufflers are ordered.
Doug
You did send a bunch of the copper nuts (more than enough) with the down tubes. Thanks for that.
I should use steel nuts while doing the fitting of the down tubes and merge as the copper nuts keeps keep backing the clamp studs (the long ones) out. The long manifold studs are the ones that get the locktite. All the pipes and mufflers are ordered.
Doug
pamp
Well-Known Member
Indeed....thought I had. As well as springs and new studs. Don't use the copper nuts after the springs though....stainless for finish, steel during the test fit (lubed) the copper nuts at the head. No lock-tite anywhere on exhaust. One must consider disassembly, bitch enough. The long studs will wear with that set up, best you can replace with ease. I have at least one manifold in the stash that is not usable due to worn out/seized studs....very hard to drill out.... copper high temp never-sieze on the final. If those studs back out of the manifold than that is a very good thing, usually what condemns that style, the 818, manifold....seized studs.
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decoupe
(deceased)
Good info - duly noted.
Doug
Doug