Full Version: Wives Tale About Studs
Have heard that the use of Stainless Steel exhaust studs is verbotten. Won't give under high heat and tend to pull out. Any validity to this?
I have used stainless header bolts with aluminum heads on American v8's and never had a problem.
Only problem I've had with stainless would be galling of the threads. Any bit of debris will stop the stud from turning. Must blow out the hole well and use anti seize.
I use anti sieze anywhere on any fastener unless it's getting loctite. My experience with pulling threads is they were not torqued to specs to begin with. I once tried to use ss bolts and nuts on a jeep body and they were hard to use without neversieze. The next jeep got ss bolts with brass nuts holding the body on and together.
The military is all over the use of stainless fasteners to meet a 15 year life minumum..........
They also use a removable steel insert for blind holes....
They also use a removable steel insert for blind holes....
The only down sides to stainless is they will stretch easier than steel, and they do not have the pull strength as steel. But for non critical attachment such as exhaust they should be fine.
Actually, here http://www.thomasnet.com/articles/hardware...tener-materials is a good quick write up of fastener types. It does not get in to specific hardness for each size though.
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