Exhaust manifold question
Thread Starter
|
Trailering
Joined: Jun 2024
Posts: 17
Likes: 0
Exhaust manifold question
I have a 1983 F150 w/4.9L WITH ALL THE EMISSIONS AND SMOG CRAP REMOVED. My old exhaust manifold had a crack in it, so I purchased a new one. The new manifold has 2 plugs in it and one seems to have a small hole drilled in it. Is this for the EGR valve? And if so can I remove it and insert a plug in it's place since I don't run an EGR? And if not, what is this plug with a hole in it? Thanks in advance.
Moderator
Joined: Jan 2001
Posts: 57,028
Likes: 2,764
From: Virginia
It may be the hole for the choke tube. If that is the case, you could leave the hole open and no harm would be done. You could squirt a can of brake cleaner in the hole, and see if it comes out inside the manifold, or just goes right on through to another small hole. If it goes right on through, it's the choke tube hole.
Lead Driver
Joined: Jun 2013
Posts: 5,696
Likes: 1,174
From: Tolland, CT
Trending Topics
FTE Legend
Joined: Nov 2015
Posts: 30,997
Likes: 4,143
From: Angier, NC
Because I am a "show me" type 
If it was not so cold I would check the log manifold in the garage.
I can only think of the small holes for the choke tubes and the large hole for the EGR tube.
So I am guessing it is the EGR. IIRC the old manifolds uses adapter and think the manifold side is pipe thread 1/2" or 3/4" at most.
Dave ----
If it was not so cold I would check the log manifold in the garage.
I can only think of the small holes for the choke tubes and the large hole for the EGR tube.
So I am guessing it is the EGR. IIRC the old manifolds uses adapter and think the manifold side is pipe thread 1/2" or 3/4" at most.
Dave ----
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Fords to Drive Before You Die
Joe Kucinski
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
Thread Starter
|
Trailering
Joined: Jun 2024
Posts: 17
Likes: 0
exhaust manifold
Thanks to all responders, it is the choke hole. No need to plug the hole as it does not go into the exhaust chamber. If I had used common sense I would have figured it out sooner than later since there is a similar hole on the top side of the manifold for an optional position to use.
Moderator
Joined: Jan 2001
Posts: 57,028
Likes: 2,764
From: Virginia
Thanks to all responders, it is the choke hole. No need to plug the hole as it does not go into the exhaust chamber. If I had used common sense I would have figured it out sooner than later since there is a similar hole on the top side of the manifold for an optional position to use.
Thread
Thread Starter
Forum
Replies
Last Post
warrenballard
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Jan 4, 2004 01:35 AM