A dumb question on headers...
New User
Joined: Dec 2012
Posts: 5
Likes: 0
I agree with Roger Carter, heat seems to help. Even used a propane torch on 390s not in vehicle. I have used stainless bolts before, but they always felt funny when backing out. Never broke one, but I think stainless has a tendency to gawl the threads.
5th Wheeling
Joined: Feb 2012
Posts: 48
Likes: 0
From: Ventura, CA
On 360/390's the bottom row of bolts for the exhaust manifolds are "blind" holes. They go into the block and bottom out. The top row of bolt holes are through holes. The bolt can screw all the way through and stick out of the end of the hole. A lot of times the bolts in these holes will seize up and break off.
Use lots of good penetrating oil (PB Blaster, Kroil, etc.) and time. Soak the top row of bolts and let them sit, then do it again, and again over several days.
Use lots of good penetrating oil (PB Blaster, Kroil, etc.) and time. Soak the top row of bolts and let them sit, then do it again, and again over several days.
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5th Wheeling
Joined: Jan 2010
Posts: 45
Likes: 0
So let's hear some more about the header collectors terminating just shy of the transmission support. My F-100 is 2WD, and an automatic... anyone out there NOT have a problem with headers clearing their transmission support, and what kind of set-up do you have? Great info here!
Thanks,
Karl
Thanks,
Karl
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
So let's hear some more about the header collectors terminating just shy of the transmission support. My F-100 is 2WD, and an automatic... anyone out there NOT have a problem with headers clearing their transmission support, and what kind of set-up do you have? Great info here!
This FTE'er modified the trans crossmember with two reliefs to provide more clearance for each tube to pass by the transmission. It's worthy of consideration IMO.
<O
</O
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,150
Likes: 5,784
From: S/W Missouri, Polk county
Can someone please post up that side shot view of the awesome pipe routing someone on here did. I cant find it but it shows the clearance issues, and a great way to work thru it. That guys exhaust guy is a guru.
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Mountain Pass
Joined: May 2006
Posts: 173
Likes: 2
As for the trans crossmember issue, I had no problem with my 4 speed 2 WD truck, maybe the automatic or 4x4s are different? On my truck, the bracket for the radius arm mounts are close to the collectors, but were no problem. I took my truck for a custom dual exhaust system, and they bent the tubing to allow the pipes from the collectors to run on top of the trans crossmember.
I don`t have the number for my FlowTechs, but I believe the F100 thru F350 2 WD use the same headers.
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