5.4 exhust manifold studs rusting
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Fleet Mechanic
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5.4 exhust manifold studs rusting
I ran into a mechanic today who just did his 99 5.4 sd exhust manifold studs. He said they all will do it. He has 130000 on his.
He said the studs rust from the reaction with the aluminum heads.
He said a good mechanic might take about 8 hrs. to do the job. You have to take the inner well panels out and heat just the stud, remove them with a stud remover and insert new ones. He said he took the whole manifold off because he wanted too clean the rust off them and check them out also.
Anyone else been there yet?
He said the studs rust from the reaction with the aluminum heads.
He said a good mechanic might take about 8 hrs. to do the job. You have to take the inner well panels out and heat just the stud, remove them with a stud remover and insert new ones. He said he took the whole manifold off because he wanted too clean the rust off them and check them out also.
Anyone else been there yet?
Lead Driver
Joined: May 2003
Posts: 9,303
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From: Lyndonville, Vermont
5.4 exhust manifold studs rusting
I just did mine Took about 5 mins to take the wheel well cover off. Most of my studs came out with the nut very easy. Others the nut came off then I used vise grips..Of course I had to use 12 mm socket instead of 13 they were well rusted.
Has nothing to do with aluminum and everything to do with crap sprayed by the wheel.
Has nothing to do with aluminum and everything to do with crap sprayed by the wheel.
Senior User
Joined: Dec 2002
Posts: 466
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5.4 exhust manifold studs rusting
It does have to do with aluminum and steel being two dissimilar metals which causes electrolosis, causing your corrosion. I work with a lot of dissimilar metals and know this. put some nickel anti-sieze on the new ones and you shouldnt have a problem.
MotoX
MotoX
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Fleet Mechanic
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5.4 exhust manifold studs rusting
Originally posted by 99f350sd
I just did mine Took about 5 mins to take the wheel well cover off. Most of my studs came out with the nut very easy. Others the nut came off then I used vise grips..Of course I had to use 12 mm socket instead of 13 they were well rusted.
Has nothing to do with aluminum and everything to do with crap sprayed by the wheel.
I just did mine Took about 5 mins to take the wheel well cover off. Most of my studs came out with the nut very easy. Others the nut came off then I used vise grips..Of course I had to use 12 mm socket instead of 13 they were well rusted.
Has nothing to do with aluminum and everything to do with crap sprayed by the wheel.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
5.4 exhust manifold studs rusting
Yes go to ford and get new everything..including gaskets.
The rusted part is outside of the aluminum it rusts because of the heat and elements. Metal won't rust because its near or in contact with aluminum. The aluminum might corrode but the aluminum has no effect on the steel. I've been working on motorcycles and outboards for 35 years and don't think I've seen many rusty steel parts ..Buy the way the part that is threaded into the head was real clean like new. Ford uses galvanized studs.
The rusted part is outside of the aluminum it rusts because of the heat and elements. Metal won't rust because its near or in contact with aluminum. The aluminum might corrode but the aluminum has no effect on the steel. I've been working on motorcycles and outboards for 35 years and don't think I've seen many rusty steel parts ..Buy the way the part that is threaded into the head was real clean like new. Ford uses galvanized studs.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
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Fleet Mechanic
Joined: Dec 2002
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5.4 exhust manifold studs rusting
Originally posted by 99f350sd
Yes go to ford and get new everything..including gaskets.
The rusted part is outside of the aluminum it rusts because of the heat and elements. Metal won't rust because its near or in contact with aluminum. The aluminum might corrode but the aluminum has no effect on the steel. I've been working on motorcycles and outboards for 35 years and don't think I've seen many rusty steel parts ..Buy the way the part that is threaded into the head was real clean like new. Ford uses galvanized studs.
Yes go to ford and get new everything..including gaskets.
The rusted part is outside of the aluminum it rusts because of the heat and elements. Metal won't rust because its near or in contact with aluminum. The aluminum might corrode but the aluminum has no effect on the steel. I've been working on motorcycles and outboards for 35 years and don't think I've seen many rusty steel parts ..Buy the way the part that is threaded into the head was real clean like new. Ford uses galvanized studs.
Thanks
Jim
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Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
5.4 exhust manifold studs rusting
No... heating metal sometimes causes it to bind in aluminum. I had a tough one and I tried to heat it to no avail the head just soaked up the heat anyway...I ave a 20 inch 3/8 extension that I used on some of them also the size socket you use or can use is important. I was able to bang a 12mm socket on and turn most of the nuts with the studs..
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