For this same application, I've been looking for 3/8 stainless lock nuts for a while with no success. The only stainless ones available have a nylon insert inside (which will melt).
Using stainless nuts on exhaust manifold studs
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 2,144
Likes: 195
From: Englewood FL
Using stainless nuts on exhaust manifold studs
Is there any problem with using stainless steel nuts on the exhaust
manifold studs? I want to be able to remove them in the future
without the risk of breaking the studs.
A recent thread mentioned using tall brass nuts.
manifold studs? I want to be able to remove them in the future
without the risk of breaking the studs.
A recent thread mentioned using tall brass nuts.
Melting Slicks
Joined: Jul 2001
Posts: 2,609
Likes: 12
From: Massapequa Park NY
Jim
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
I bought a kit once to try and the first one I threaded on started peeling the threads off the stud. I used the studs but threw the nuts away.
Drifting
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Stainless hardware is softer than regular steel, I wouldn't use it on an exhaust manifold. You can twist a stainless bolt off allot easier than a steel one. A generious amount of antisieze as others have said is a better solution.
Team Owner
Joined: Aug 2000
Posts: 21,460
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
....I stopped using stainless nuts on exhaust systems because the threads in them stayed so clean it seemed they'd loosen up all the time like header bolts. Ended up loosing a few too, even with using lock washers. I just went back to using the regular steel nuts and a high temp never-sieze on the stud threads and I've never had a problem disconnecting the exhaust systems whenever I need to.
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Verdad Gallardo
Le Mans Master
Joined: Dec 2003
Posts: 5,727
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From: Fremont CA
There are Aircraft grade SS hi-temp lock nuts, I think they can be bought cheaper than this site, or I'll sell them to you for $3 each if you want the BEST. link: http://www.jamestowndistributors.com...ight+Lock+Nuts
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
Dorman long brass 3/8 USS exhaust nuts as 'TimAT' suggested is your best bet. The brass is easily removed and locks tight surprisingly well. Stainless studs are compatible and resist the elements better than steel studs
