torgue/bolt sequence on a 351 windsor
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Post Fiend
Joined: Sep 2009
Posts: 23,620
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From: Coeur d alene, Id
torgue/bolt sequence on a 351 windsor
hey everyone i am finally able to get my exhaust gaskets for my headers this week and am planning on installing them this Saturday but i need to know the sequence of tightening down the bolts and how many ft lbs they should be torqued down
also the same for valve cover gaskets. thanks. this is on my 85 f 150 351 windsor.
also the same for valve cover gaskets. thanks. this is on my 85 f 150 351 windsor.
Senior User
Joined: Jan 2010
Posts: 216
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From: Emerald Coast of Florida
I don't know if the manifold is the same as your headers but here is what the book says:
Install the pilot bolt, then all the rest of the bolts. Tighten all bolts to 22 ft. lbs., starting from the center and working to both ends alternately. Tighten the exhaust pipe-to-manifold nuts to 24 ft. lbs
NOTE: The manifold may warp slightly and all the bolt holes may not align perfectly. The holes in the manifold may be elongated to correct this condition. HOWEVER, do not alter the pilot bolt hole. The pilot bolt is the 3rd from the front. This hole and its corresponding threaded hole in the head must align to properly center the manifold on the head. So, when installing the manifold, instll this bolt first.
Install the pilot bolt, then all the rest of the bolts. Tighten all bolts to 22 ft. lbs., starting from the center and working to both ends alternately. Tighten the exhaust pipe-to-manifold nuts to 24 ft. lbs
NOTE: The manifold may warp slightly and all the bolt holes may not align perfectly. The holes in the manifold may be elongated to correct this condition. HOWEVER, do not alter the pilot bolt hole. The pilot bolt is the 3rd from the front. This hole and its corresponding threaded hole in the head must align to properly center the manifold on the head. So, when installing the manifold, instll this bolt first.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I've never heard of a pilot bolt for exhaust. Many header gaskets don't have end holes, they're slotted, you mount the header on the heads with these two bolts loosely, then drop the gasket behind the flange, then install the rest of the bolts and tighten them any way you like, using whatever style wrench you can use. It's impossible to use a torque wrench on headers, there's just no room to get a socket on many header bolts. Get em as tight as you can, using whatever wrench you can use.
Senior User
Joined: Jan 2010
Posts: 216
Likes: 0
From: Emerald Coast of Florida
I didn't see anything on valve covers. Here is the link for your future use:
EBSCO Publishing Service Selection Page
Red
EBSCO Publishing Service Selection Page
Red
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