Trick to removing echaust manifold studs?
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Junior User
Joined: Sep 2003
Posts: 97
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From: S/W Arkansas
Trick to removing echaust manifold studs?
Ok, I am in the middle of replacing the exhaust maifold studs on my truck. The one closest to the fender came out easy ( nut was rusted to stud and it backed the stud out). But the second one is giving me fits, it never had a nut on it, someone must have taken the pipe off before and half way put it back on, hence the exhaust leak and why I'm replacing them. I dropped the starter to get a better access to it. I has been sprayed wiyth WD-40 all day, I can get vise grips on it, but the stud is so soft they don't get a bite. Any tips? Thought of putting the starter back in and starting the truck to warm the manifold and see if I can grip it enough to turn it out. Any other ideas, Thx.
Senior User
Joined: Jan 2005
Posts: 129
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From: Augusta, Maine
I recently replaced all the studs on my 95 E150 300. I had the luxury of working on my bench vise, because I removed the manifolds. Only one stud came out with just visegrips. A couple were removed after heating with standard propane torch, and the last wouldn't move until I heated the surrounding area to a soft red glow with oxyacetylene. And this is all considering I had a spare manifold. I broke one stud off in the first manifold and ended up ruining it when I took an angry cutting torch to it! I was lucky I had a backup!
Expect a fight!
They appear to be a special design tight thread. Very shallow thread grooves. Standard size US threaded stud will work. Ford gets 7 bucks a piece for each stud and 7 bucks a piece for matching brass nuts. In hindsight I should have shopped around more for aftermarket studs and nuts. I went to Ford after only checking one parts shop, which didn't have the large size I needed.
Good Luck!
Expect a fight!
They appear to be a special design tight thread. Very shallow thread grooves. Standard size US threaded stud will work. Ford gets 7 bucks a piece for each stud and 7 bucks a piece for matching brass nuts. In hindsight I should have shopped around more for aftermarket studs and nuts. I went to Ford after only checking one parts shop, which didn't have the large size I needed.
Good Luck!
Thread Starter
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Junior User
Joined: Sep 2003
Posts: 97
Likes: 0
From: S/W Arkansas
Well it sounds like a torch is the best option. But I don't have one. I will try the jam nut technique and hope it works, because I've messed the threads up pretty bad with vise grips. My uncle does have a welder I can get ahold up pretty easily if I could weld a nut on the stud and back it out.
