|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-16-2016, 05:50 PM | #1 |
Member
Join Date: May 2012
Location: Placerville, CA 95667
Posts: 96
|
Intake manifold heat riser
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.
|
10-17-2016, 07:19 AM | #2 |
Senior Member
Join Date: May 2010
Posts: 4,751
|
Re: Intake manifold heat riser
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.
|
Sponsored Links (Register now to hide all advertisements) |
|
10-17-2016, 12:01 PM | #3 |
Member
Join Date: May 2012
Location: Placerville, CA 95667
Posts: 96
|
Re: Intake manifold heat riser
Terry-
I didn't think about it being part of the casting but it makes sense. Thanks for your response. |
10-17-2016, 09:18 PM | #4 |
Senior Member
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
|
Re: Intake manifold heat riser
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 |
10-18-2016, 08:50 AM | #5 |
Senior Member
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 16,436
|
Re: Intake manifold heat riser
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.
|
10-18-2016, 10:32 AM | #6 |
Member
Join Date: May 2012
Location: Placerville, CA 95667
Posts: 96
|
Re: Intake manifold heat riser
Sponsored Links (Register now to hide all advertisements)
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|