First Project without Guidance

[LRobinson]

Ok i was off on a camping trip. While I was away the carb got sent off, rebuilt, and returned. I'm going to be talking about it shortly. However todays questions involves something different. I have two parts that I'm unsure about. I have no idea what they are for but I think one bolts onto the manifold as something is suppose to go there. Any information is appreciated.

[LRobinson]

Here is a photo of the two parts

[JohnnyPopper]

That's an EGR valve (exhaust gas recirculation). You will need to install it unless you can find a way to seal and cap off the openings on the manifold.

Vacuum items are not needed for your build.

[LRobinson]

Ok, I will clean it out and re install it. What is the purpose of the valve? It doesn't look like anything hooks up to it.

[JohnnyPopper]

One of the ports it covers is to your exhaust manifold, the other is to your intake manifold.

Under certain condition, vacuum opens the valve, and allows exhaust to be recirculated into your intake, mixing with the air/fuel.

It was designed to reduce emissions.

Be aware, if and when they fail, they will induce unwanted exhaust gas and your engine will run like poop.

I would look for a way to seal it off and never look back.

Maybe someone here knows of such a product. Can't cost much-it's so simple. I would probably make one if they don't exist.

[LRobinson]

Been trying to find a replacement to no avail. I'm going to try and make a cover plate with a piece of steel and some gasket maker.

[LRobinson]

I finally managed to order a replacement and should have a new EGR Mid week. Does it run from a line off the carb?

[JohnnyPopper]

In a roundabout way, but since you have no smog requirements, leave it disabled.

You gain nothing from having it active.

Good to see you making progress 

[LRobinson]

OK on the intake manifold above the EGR valve and right below the carb is a large diameter threaded hole. I have no idea what screws in here. I don't have a whole lot of parts left. I also have a lever on the exhaust manifold. Again I don't have a clue as to what bolts on to this Worse case just put a large bolt in the intake hold and wire the lever in a set position. But I don't know which position it needs to be in.

[LRobinson]

Here is the large hole above the EGR valve. Yes i see the loose crap on it. I'm going to vacuum the heck out of the intake and try to clean it up as much as I can.

[JohnnyPopper]

Hard to say what that hole was used for-Threaded right?

Can you take a couple of pics from back a few feet?

The lever may be used to direct exhaust gas to the area under your carb, is there anything on the other side of it?

Again, pics from as many angle as you can will help a lot!

[LRobinson]

I was able to find out that the big hole above the EGR is plugged. I was able to look at the old cracked head and that hole has a bolt with a square head on it. At least from what I can tell. For the lever best guess is something  that isn't super crucial. more pictures to follow.

[LRobinson]

Doing some more digging and it looks like the lever could be the EFE or thermal vacuum switch or something like that. Something to help in cold weather. Issue with that is if I wire it in the wrong position it wont be a happy engine. If I'm right that is...

[JohnnyPopper]

Something actuated it so it would be good to find out.

My V8 has a similar valve that causes the exhaust port to close till it warms up.

[Mike81K10]

Agree with Johnny! I had one on my exhaust manifold (passenger side of engine) that I removed long ago. I would imagine the it is not critical. However, I don't know much about diesels.