vacuum line on exhaust manifold

[captiannapalm]

Where does the vacuum line go that comes off the rear of the passenger side exhaust manifold. I am not refering to the choke tube. This comes off the back and has vacuum pressure. it would be nice if I could post a picture but the file is too big.

[62cutlassconvert]

Exhaust manifold won’t have vacuum.

[captiannapalm]

Well this does. I will try to get a puc that works

[captiannapalm]

I guess its called a road draft tube?

[joe_padavano]

The choke hot air tube has vacuum from the carb. That’s how the heated air gets pulled past the choke coil. The other end of that stove in the exhaust manifold is obviously also going to have vacuum, since air has to be pulled into the stove to be heated before it goes to the choke coil. It’s all the same tube.

[62cutlassconvert]

Joe you’re right, the carb choke of that type pulls vacuum. Your description is correct.
However, the exhaust manifold isn’t pulling or have vacuum, the carb is pulling vacuum. The exhaust manifold tube simply provides heated air for the carb vacuum.

[captiannapalm]

The choke tube is in place. This is another line that runs in the back of the engine bay behind the pass. side head and into the exhaust manifold.

[captiannapalm]

This is the line in question if the pic loaded

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[joe_padavano]

“Joe you’re right, the carb choke of that type pulls vacuum. Your description is correct.
However, the exhaust manifold isn’t pulling or have vacuum, the carb is pulling vacuum. The exhaust manifold tube simply provides heated air for the carb vacuum.”

I thought that’s what I said. The tube in the hot air stove simply passes through the manifold casting. One end connects to the carb and sees manifold vacuum. The other end is the inlet for that vacuum source. I never said the exhaust manifold was producing vacuum.

[joe_padavano]

“This is the line in question if the pic loaded”

Any chance of a photo that’s in focus and zoomed out a little so we can see what’s going on?

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