Exhaust Manifold Replacement
Thread Starter
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Trailering
Joined: May 2021
Posts: 17
Likes: 5
Exhaust Manifold Replacement
I have a 1984 F150 5.0, 302, v8, 2bbl carb, AOD. I discovered that the exhaust manifold on the passenger side has a hole on the bottom. I'm wanting to replace both of the manifolds. Are the manifolds from 1980-1986 the same or does the 84 have a special one? I was looking at rock auto and saw they carry more manifolds for the different years as opposed to only ATP & Dorman for 1984. What would y'all recommend for a good replacement?
Any advice y'all might share would be greatly appreciated.
Any advice y'all might share would be greatly appreciated.
Lead Driver
Joined: Jun 2013
Posts: 5,667
Likes: 1,159
From: Tolland, CT
Have you checked car-part.com. The junkyard site.
A 85/86 302 was EFI so they may be different. My 86 has a O2 in back of the passenger side
A 85/86 302 was EFI so they may be different. My 86 has a O2 in back of the passenger side
Last edited by Max Capacity; Mar 12, 2026 at 03:44 PM.
Thread Starter
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Trailering
Joined: May 2021
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Likes: 5
I haven't checked yet. I did find a junk yard close by that has a 1985 f150. There's a choke heat tube coming off going to the carburetor on the passenger side manifold. And what looks like a mechanical valve attached to the driver side manifold.
Lead Driver
Joined: Jun 2013
Posts: 5,667
Likes: 1,159
From: Tolland, CT
https://www.garysgaragemahal.com/
Gary's site will have a link to the EVTM under the Electrical, in the Documentation where you can see how it should be. Sounds like it maybe that tube for the choke stuff... Can you get us a picture... we like pictures.
https://www.garysgaragemahal.com/1981-evtm.html
This may help too manifolds. https://www.garysgaragemahal.com/man...alves-etc.html
Gary's site will have a link to the EVTM under the Electrical, in the Documentation where you can see how it should be. Sounds like it maybe that tube for the choke stuff... Can you get us a picture... we like pictures.
https://www.garysgaragemahal.com/1981-evtm.html
This may help too manifolds. https://www.garysgaragemahal.com/man...alves-etc.html
Last edited by Max Capacity; Mar 12, 2026 at 05:21 PM.
FTE Legend
Joined: Nov 2015
Posts: 30,912
Likes: 4,123
From: Angier, NC
Do you have an exhaust leak on that side?
I ask because that does not look like the as I dont see an exhaust leak at the hole.
If there was you would not see the wet oil around the hole.
That looks like a tin heat shield for the starter that fits around the manifold.
I dont have a v8 so I cant look to see if I have one like yours.
Dave ----
I ask because that does not look like the as I dont see an exhaust leak at the hole.
If there was you would not see the wet oil around the hole.
That looks like a tin heat shield for the starter that fits around the manifold.
I dont have a v8 so I cant look to see if I have one like yours.
Dave ----
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Lead Driver
Joined: Nov 2013
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More details with good pictures here:
https://www.ford-trucks.com/forums/1...ed-photos.html
As far as I know, nobody makes a reproduction heat stove. Couldn't find anything at the time when my original rusted away.
Last edited by kr98664; Mar 12, 2026 at 09:37 PM.
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FTE Legend
Joined: Nov 2015
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From: Angier, NC
Good eye! Didn't notice that while looking on my phone. But on a bigger screen, that certainly looks like the heat stove for the heated air intake. The cast iron manifold inside is likely just fine.
More details with good pictures here:
https://www.ford-trucks.com/forums/1...ed-photos.html
As far as I know, nobody makes a reproduction heat stove. Couldn't find anything at the time when my original rusted away.
More details with good pictures here:
https://www.ford-trucks.com/forums/1...ed-photos.html
As far as I know, nobody makes a reproduction heat stove. Couldn't find anything at the time when my original rusted away.
Also you can see the starter where the cable is connected and the tin just above it.
I also believe that there was a hole there to start to drain any water that may collect on it to drain.
When you have a edge like at the hole, rust will start there. You can just make out part of the factory hole.
I dont think anyone makes a replacement and with that little hole I would not worry about it.
They do make starter heat shields to fit any motor, check Summit Racing or Jeggs.
What I would worry about is the oil leak.
Oil on a hot manifold is just asking for a fire
Dave ----
Logistics Pro
Joined: Jun 2017
Posts: 3,963
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From: Edmond, OK
If you can't find a new heat stove/starter heat shield on a salvage yard truck you could always remove it and take it to a skilled welder for repair. If you're doing a concours restoration.
Last edited by Olds64; Mar 13, 2026 at 07:24 AM.
Thread Starter
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Trailering
Joined: May 2021
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I appreciate it!
Just ordered some heat shielding material to re-enforce that area.
I snugged the bolts on the valve covers..probably going have to replace the gaskets. I learned from a previous thread that the upper intake manifold will have to come out to get to both of them. That's going to be the next project.
Just ordered some heat shielding material to re-enforce that area.
I snugged the bolts on the valve covers..probably going have to replace the gaskets. I learned from a previous thread that the upper intake manifold will have to come out to get to both of them. That's going to be the next project.