broken exhaust manifold stud
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Junior User
Joined: Dec 2006
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From: Prairie View, Texas
broken exhaust manifold stud
Just found a broken stud at the bottom left rear exhaust manifold. Don't see any obvious discoloration from a leak and hear no hissing sounds either. should I just leave well enough alone or go through the grief of changing it out ?
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Joined: Mar 2005
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From: Burnsville, MN
There's definitely a history with the manifold bolts on the older V10's, because evidently in '05 Ford switched them to stainless. I've also seen the occasional post from someone with 3 or so bolts shot, which suggests that your problem will continue to progress over time.
As to fixing one bolt, you might want to do a search on manifold bolts, because sometimes they can be a bear to get out depending upon how much is available to get a grip on.
It seems to me that if you can get enough of a grip on it to get it out and replace it, it should slow down breakage of the others...? Of course if you have to remove the entire manifold you might as well replace that entire side....
As to fixing one bolt, you might want to do a search on manifold bolts, because sometimes they can be a bear to get out depending upon how much is available to get a grip on.
It seems to me that if you can get enough of a grip on it to get it out and replace it, it should slow down breakage of the others...? Of course if you have to remove the entire manifold you might as well replace that entire side....
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Joined: Jul 2002
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From: Long Island USA
Originally Posted by BareBones
There's definitely a history with the manifold bolts on the older V10's, because evidently in '05 Ford switched them to stainless. I've also seen the occasional post from someone with 3 or so bolts shot, which suggests that your problem will continue to progress over time.
The problem is not corrosion of the studs. The manufacturing process for the studs was flawed and that's why they break.
The nuts are not stainless, and they lock up to the manifold, and as the manifold expands and contracts, they break the studs.
But the studs are flawed to begin with.
I'd say, for now, just replace that one stud. Doing the entire job is not an easy thing, and you might want to bring it to a professional
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I have 2 or 3 broken now, and I am debating on pulling the manifold, or.... I have thought of replacing the manifold with a set of headers and wait till it starts to leak, than that way I have an excuse to go spend the money for headers or is my idea flawed.
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Joined: Jul 2002
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From: Long Island USA
Originally Posted by Lizard XJ
I have 2 or 3 broken now, and I am debating on pulling the manifold, or.... I have thought of replacing the manifold with a set of headers and wait till it starts to leak, than that way I have an excuse to go spend the money for headers or is my idea flawed.
Never heard the leak until I heard a tick tick... and all 6 were already gone.
Real mother of a job too... elapsed time, it took me something like 3 weeks.
There's a thread about my trials and tribulations here:
https://www.ford-trucks.com/forums/5...ud-or-two.html
