Help me identify this part

[Millercorey]

Help! The place that did my engine rebuild wouldn't pull it for me, so I had to find a shop down the street to pull and reinstall it. I just went by to check on progress, and the guy told me this line/hose broke off and he needs another. I'm not familiar with it and he doesn't know what it's called.

Looking straight on at the motor, it came out of the back left corner and hooked up somewhere in or near the choke. This carb (think it's the original 2bbl) had an electric choke that wasn't wired up (not sure if broke or PO was just lazy), so my mechanic just set it to be somewhat lean for a compromise. There is no mechanical choke line either. This meant I had to start it 2 or 3 times to warm it up.

Anyone know what this is? Mechanic seemed to think it was some kind of "exhaust choke thing" which makes me think it's an exhaust choke tube to open the choke up when the engine heats up? Can't find any replacements on bronco specific vendors, and I'm not sure if it's even needed

Image:
https://drive.google.com/file/d/0BypqkxxSMLfwNXhZcEdsQThEZ3c/view?usp=drivesdk

 

[Slowleak]

Looks like a choke heat tube. Here is a thread with a picture.
http://classicbroncos.com/forums/showthread.php?p=1508002

And here's a thread showing how to replace it.
http://classicbroncos.com/tech/early-bronco-heat-riser-replacement

 

[Steve83]

How about a pic showing where it goes? And a close-up of the end?

 

[B RON CO]

Hi, the choke stove does not have a rubber hose. My first guess is the vacuum modulator on the tranny

 

[Slowleak]

Hi, the choke stove does not have a rubber hose. My first guess is the vacuum modulator on the tranny

That's the intake for the heat tube system. There are two parts to the heat tubes. The rubber hose connects to the carb inside the air cleaner, and to a steel tube which connects to the bottom of the exhaust manifold. There is a second steel tube, wrapped in insulation, which comes from the top of the exhaust to the choke housing. Air is pulled through thru the rubber hose down into the manifold, where it is heated, and then into the choke thru the insulated tube.

 

[broncodriver99]

X2 on what Slowleak said. It is the choke stove tubing.

 

[NGABronco]

Try this!!


https://shop.advanceautoparts.com/w...ypeList&actionSrc=Form&searchTerm=Choke+Stove

 

[Millercorey]

Damn. You guys are awesome. Appreciate the knowledge and the links. Bought from that mustang website so hopefully it's the same (or close enough)

 

[Millercorey]

Follow up - so my guy is saying apparently on the exhaust manifold there's no place to install the insulated tube. He's saying we would have to drill and tap it. There's no way we would have to do that, right?

 

[Slowleak]

If you have the stock manifold, there should be a place for it. It may be broken off and needs to be drilled out and tapped. See the link I posted abound about replacing it.

You can live without this if you have a working electric choke. The electric chokes were added to reduce emissions. It opened the choke quicker than the heated choke so it leaned out the mixture faster. In a warm climate, a properly adjusted electric one works fine by itself.