DC manifold ?

casered

Member
I am doing a restoration on a DC in remembrance of my son that past away and I want it to done so I don't have to go back and do
other things later on. I bought a new exhaust elbow for it because that was rotted at the top. I got the old one off the
exhaust manifold with heat, rust bomb, and an impact driver with no damage to the exhaust manifold. The problem I've run into
now is that the exhaust manifold is paper thin and I am afraid that if I use it that it will rot through in short order and then
I will have to replace it.

I see online that a new exhaust manifold is available from Steiner tractor parts. Has anyone ever used this manifold or seen on
that can give me an idea if they are decent replacements. I think that if it is decent it would be a better alternative than
using the old one that will rot away quicker. If it last's as long as the original did it will outlast me.

Also the intake manifold has a pipe plug tapped into it in the center right below the exhaust elbow. From all the pictures I
have seen online or in my manuals I have not seen this on any of them. I am assuming it is something that a previous owner
added at some point. I see that the intake manifold is also available online and I am thinking that if the pipe plug is non
O.E.M. that I may just replace it as well and have the whole manifold be new and good for a long time.

So what are the opinions of you guy's with experience? Any help would be great.
 
My 49 DC has quarter inch?? maybe 3/8 plugs in the intake manifold. I injected a little carb cleaner in thru them to get it to fire shortly after I brought it home. Maybe we aren't talking about the same plugs??? gobble
 
Those 'added' plugs (ports) on tractor intake manifolds were most likely for a connection to the milking machine system. That only needed a 'vacuum' to operate and
the vacuum inside the intake could make a milker work. Like when electric power was out.
My Dad had a 1/4 pipe fitting on his Farmall-H and could connect a rubber hose to it and in thru a barn window to the vacuum line.
 
Most gas tractors of the 40's and 50's had 1/4 pipe plugs in the intake side of the manifold.

I don't think milkers were the original reason for the plugs. Although lot of farmers did use them for vacuum to operate milker's. I think they might have been for a cold starting aid or part of the manufacturing process.

We use to remove the plugs and shoot starting fluid in the tractor.

I have two Case SC's, a 9n Ford,a 641Ford. They all have the plugs in the manifold.
 
I took one off my SC years ago, and installed a primer cup off an antique engine. Really helps it start on the those -20 mornings. I use it in the winter for woods work and also to run my pto log splitter.
 
(quoted from post at 00:28:18 07/05/15) Most gas tractors of the 40's and 50's had 1/4 pipe plugs in the intake side of the manifold.

I don't think milkers were the original reason for the plugs. Although lot of farmers did use them for vacuum to operate milker's. I think they might have been for a cold starting aid or part of the manufacturing process.

We use to remove the plugs and shoot starting fluid in the tractor.

I have two Case SC's, a 9n Ford,a 641Ford. They all have the plugs in the manifold.

Somewhere in my travels I saw a pamphlet that showed the manifold on a tractor being used to power a milking machine. I don't remember if the pamphlet was an add for the tractor, or the milking machine. Maybe I'll dig around on the internet to see if I can find something like this.
 
A vacuum gauge was, and still is a valuable engine diagnostic tool.

I believe this was the intent of casting the holes and installing plugs.
 
Thank you for all the responses on the intake manifold. Does anyone have any experience with the new reproduction exhaust manifold though? That is my major concern right now. Just wondered what the quality was like really on them before I drop the coin for it.
 
The 2 DC s that dad had came new from Racine with those plugs in the manifolds. No idea why they were there. Suppose the factory hooked a gauge up there for a final check of the engine? clint
 

casered I've been running two of the Steiner's DC exhaust manifolds since about this time last year. Everything fit right and went together ok. No leaks. New manifold to head gaskets and new ferrules. I took my time putting everything together.
I made all the other gaskets (air cleaner ect).
 

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