Intake manifold heat riser

[rg130]

I have a question about the heat riser chamber under the carburetor portion of an Early V8 intake manifold. I believe the manifold is from the 38-42 period but not sure. While looking at the manifold off the engine I noticed what appeared to be a rod protruding from one of the heat riser holes. I attempted to pull it out with some pliers when it broke off. After some work I was able to get the rest of it out the hole in pieces and found what appears to be a fulcrum type device that was cast into the chamber when the manifold was made. I also noticed a metal pin in the bottom of the chamber which apparently held the device in place during casting. I have looked at other manifolds and never noticed a pin in the bottom and always thought the chambers to be empty. My question is what was its purpose and what years was it used if anyone knows.

 

[TerryOH]

It may be from the casting of the metal. A form that had broken off and lodged in the cavity during the casting process. I have removed metal wire from the coolant cavity of heads.

 

[rg130]

Terry-
I didn't think about it being part of the casting but it makes sense. Thanks for your response.

 

[Binx]

No expert but that manifold is interesting because it looks late '30s-'50s but still has vacuum taps near the bolt holes like early to later '30s.

Lonnie

 

[rotorwrench]

They did use core wire to hold the internal sand cores but that looks more like something else. I wonder if a careless mechanic dropped something in there.

 

[rg130]

I had to cut the item into pieces in order to get it out the heat riser hole. In tack it would be too large to fit through the hole.