'02 exhaust manifold replacement
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More Turbo
Joined: Feb 2003
Posts: 521
Likes: 0
From: Alexandria, Ohio
'02 exhaust manifold replacement
Spent the last couple of days replacing exhaust manifolds on a 2002 Powerstroke with Dorman replacements. After a fight getting the original bolts out the front bolt on the passenger side broke the new Dorman manifold. Took it back and got another one. Same thing happened. Ford dealer said torque for the new bolts was 45 lbs. Manifold cracked at 30 and then 25 ft/lbs. The tightening sequence they told me had the front bolt last. Something is not right or we got 2 bad castings. What is the right torque and sequence?
Thanks!
Thanks!
Butt-Head
Joined: Apr 2004
Posts: 9,405
Likes: 2,894
From: Reed Point, MT
I have replaced/installed many stock (OEM) exhaust manifolds (mostly used) and tightened them down in many ways at many different torque settings (mostly my hereditary Norwegian torque specification called "Gootentite") and have never had a problem.
This post goes right down the yellow brick road just like the cheap aftermarket parts available these days. It MAY work...it MAY NOT. One never knows...but rest assured that Ford knew what they were doing when they specified the casting ten-fifteen years ago.
Logistics Pro
Joined: Nov 2006
Posts: 3,663
Likes: 363
From: Fallon,NV & Bainbridge OH
Exhaust manifolds like most engine items, get torqued in criss/cross or circular pattern, starting at the center and working towards the ends, so it sounds like you are doing it right. Like said probably a cheap casting.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
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Elder User
Joined: Jun 2012
Posts: 536
Likes: 2
From: N. Va.
How does one tell if the exhaust manifolds are leaking? I drove in another PSD and the over all engine noise in the cab was a lot quieter than mine. I don't see soot around the manifolds or uppipes. thx
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