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What causes exhaust manifold bolts to break?

(2008 Ford F-150)
in Green Bay, WI on November 14, 2012
Does a warped exhaust manifold cause the bolts to break or does the bolts breaking cause the manifold to warp? We are have an issue with the warranty department.
Displaying 2 answers & 2 comments
Popular Answer
on November 14, 2012
Defective materials or improper assembly.
on November 14, 2012
Wonder what motor this thing has?
on November 15, 2012
It's a gasoline/green jelly hybrid I believe.......never mind....
on November 14, 2012
repeated heating and cooling
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