This is the first post of what will probably seem like some simplistic and stupid questions, but I need the help.

First, I removed the exhaust manifolds from my 65's 289 this morning, to blast and repaint. There is a tube that is connected from the passenger side manifold to the carburetor.

1. What is this tube, and it's purpose?
2. How do I remove this tube without breaking it off in the manifold. I haven't tried yet, but as I was pulling the manifold out of the car, I noticed the tubing is extremely soft, and looks like it will break with much pressure put on it.



Thanks for any help.

Hap



[IMG]local://upfiles/32612/DF321E59656A440BBE7A6708BCB5926B.jpg[/IMG]

 

its a heat riser to make the choke open faster. depending where you live and how much you drive the car in the cold weather, youd probly be fine just getting rid of it. it doesnt actually draw exaust, but the tube runs all the way through the manifold and is heated by the exhaust, at least thats how some work, yours may draw actual exhaust. if it were mine, id probly get rid of it, but im just hard core that way.

 

Those are readily available through National Parts Depot, and probably other Mustang parts outlets. If you don't need to remove it from the manifold, don't. It does need to be there to heat the choke pull off spring. No exhaust goes through that hose...unless you've got a broken manifold.

 

Yep, it's purpose is to supply manifold heat to the carb choke mechanism so that the butterfly on the carb will open slowly as the temp of the engine rises, therefore giving you a smooth transition from a closed butterfly to a fully open one. It is a necessary thing to keep if you are going to be putting the same exhaust manifold on after painting it, and you are going to keep the same carb system. If you are going to upgrade, then you have electric choke mechanisms offered by all the carb companies, and if that is the case, then you will not need it. It depends on what you plan to do. Here are a couple of pics of how it is hooked up.
http://pic10.picturetrail.com/VOL326.../138129853.jpg

http://pic10.picturetrail.com/VOL326.../138129851.jpg

 

All,

Thanks for the information on the heat riser. I would prefer to replace the part as it has seen some abuse. Obviously, it was a threaded fitting at the carb, but how about at the manifold? Is it pressed in or threaded? Thanks again for the help.

Hap

 

It's pressed.