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Valve in my Intake Manifold?


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Hi, I am new to this stuff. Just bought a 1951 B3b. I am learning about this thing slowly, but found something I couldn't figure out.

There is a valve of some sort in my front intake manifold. The valve is spring loaded, and there is a lever on it that looks like it might be moved with a cable of some sort.

It is not the heat riser, 'cause it is just below it on the exhaust manifold.

I don't have a clue.

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The valve is your automatic choke also known as a Sisson choke. There is supposed to be a rod from the lever to the choke on the carb. It appears part of it is missing, there should be an electric solenoid on top.

You might make a note of the position of the lever. See if it changes position, cold to hot. If so it may still be working. Many were disconnected and replaced by a hand choke when they stopped working.

Up = closed

Down = open

It is up in the picture as if the motor is cold. If it goes down to a horizontal position when hot, it is working.

Edited by Rusty O'Toole
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Thanks.

currently the choke will only half close, as the vacuum assist line to the distributor is preventing it from closing all the way.

I just saw this the other day, and like I said I am totally new to these old vehicles.

Is there harm in leaving it, or not replacing the solenoid, or the levee to the carb?

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