Technical What goes here? (Exhaust Manifold Question)

New guy here, learning as I go, and so far the HAMB has been great help.

Can anyone give me a photo of what this should look like? I know it must not be complete, with just a rod sticking out of the exhaust manifold. All my service manual tells me is to check it once and a while to make sure it operates.

This is from my 64 Chrysler NewYorker with a 413. Thanks!

 

https://drive.google.com/file/d/1ezlIZW_SL_TDYqcPEwgThBFBlbs0IpES/view?usp=drive_link

 

I put your picture here so folks can see it. The heat riser valve has a weight on it, that makes it want to stay closed, and it has a thermal spring to make it easier to open as the engine warms up. Usually if the weight and spring are gone, the flapper inside is either stuck or missing.

Get the factory shop manual for the car, it'll be the best $75 (or whatever they go for now on ebay) you ever spent.

 

also there are pictures on the internet of exhaust manifolds, for example

https://www.yearone.com/Product/chrysler-b-body/hp689rh

but also there were different design weights, some are round, some are not, you'd want to search for pictures of the exact manifold you have to be sure what to get.

 

Thanks for helping out with advice and pic . I do have the service manual, but apparently still learning to read, as I did find the diagram in the book embarrassed I am.

So, it appears this is an unnecessary item? Car runs as is, however really wanted to “fix”. Anyone know the “why” it should be fixed if car seems fine?

 

The heat riser is there to divert exhaust gas through the intake manifold to speed warm up.

In a summer only car it is really not necessary.

Phil

 

You need to verify whether or not the valve is in place and whether or not it is in the fully open position.

 

I live in Arizona, it's not so big a deal down here, but where it gets cold, it's nice to have some warmth in the intake manifold to help it run better on those cold days, and make the choke open as it should etc. Hot rods....it's pretty common to block the passages and take out the valve, or install headers, and live with the not quite so good driveability.

 

MaMopar used to have repair kits. Looked like this depending on year:

 

If I have manifold with the heat riser, my usual "repair" is to wire it open all the time.

 

is the shaft free . or frozen ? can you hear or feel the butterfly moving ?

 

Hot rods dont have heat risers.....just sayin