Dayton
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- Mar 28, 2025
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- Location
- Houston, Texas
- First Name
- Dayton
- Truck Year
- 1976
- Truck Model
- C/20
- Engine Size
- 454 Big block
Can this be removed?
- Thread starter Dayton
- Start date
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Ricko1966
Full Access Member
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- Apr 11, 2017
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- Location
- kansas
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- Rick
- Truck Year
- 1975
- Truck Model
- c20
- Engine Size
- 350
No need to plug it,you might want to keep it,in case you decide you need it in cold weather. It is hurting absolutely nothing sitting there.That had a big hose that feeds warm air to the carbureator in cold weather. Even with an open element air cleaner like yours I've still been able to run warm air in the winter by making a wrap for the air cleaner that had a port for the warm air hose.
ali_c20
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- Location
- Austria
- First Name
- Alexander
- Truck Year
- 1974, 1979
- Truck Model
- C20, K5
- Engine Size
- 350, 350
Welcome from Austria. You can remove it if you don't like it sitting there and live in a warm area.
I would put it on a shelf, many of these parts are no longer produced or sold anywhere.
I would put it on a shelf, many of these parts are no longer produced or sold anywhere.
75gmck25
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- Northern Virginia
- First Name
- Bruce
- Truck Year
- 1975
- Truck Model
- K25 Camper Special TH350 NP203
- Engine Size
- 5.7
A factory stock air cleaner has a place on the snout to connect that tube, and the connection has a vacuum and thermal controlled flapper.
When the engine is cold, the vacuum flapper opens up the connection to that tube and you get heated air into the carburetor. Engine runs better and there is lower risk of moisture in the air freezing in the carburetor. As the engine gets warmer the air heats the thermal control and it slowly closes the flapper, and now you get cold air into the carburetor. The snout of the air cleaner usually then had a plastic tube leading over to the radiator support and the cold air intake.
You can probably twist that tube a little to break it loose, and it will slide up and out of the manifold heat stove. Then set it aside for later, in case you want to use it.
When the engine is cold, the vacuum flapper opens up the connection to that tube and you get heated air into the carburetor. Engine runs better and there is lower risk of moisture in the air freezing in the carburetor. As the engine gets warmer the air heats the thermal control and it slowly closes the flapper, and now you get cold air into the carburetor. The snout of the air cleaner usually then had a plastic tube leading over to the radiator support and the cold air intake.
You can probably twist that tube a little to break it loose, and it will slide up and out of the manifold heat stove. Then set it aside for later, in case you want to use it.
