what is it and what's it for

The right side exhaust manifold on a 71 225 V6 has a tube running though it, seems to be pluged with something , maybe rust I don't know. So what what is it, what's it for and does it hook to anything.

 

Re: what is it and whats it for

I believe it originally had a hose or tube that went to the choke and directed warm air to it. Perhaps someone with more knowledge about it will chime in.

 

Re: what is it and whats it for

I can't remember what it went to (maybe the diverter on the air cleaner), but it wasn't the choke. Most (maybe all), including mine, came w/ a manual choke and have this tube. Originally there was a stamped sheet metal chimney that surrounded that area of the manifold and directed warm air through a flex hose to the air cleaner. I believe (I'd have to look to be sure) there is a diverter right in front of where the flex hose connects that is controlled by heat from this tube. Its been a while though...:v6:

 

Re: what is it and whats it for

It directs warm air to operate the choke on the rodchester carb. It is sealed on one end and the other attaches to a line up to the choke.

 

Re: what is it and whats it for

the carb is manual choke...

 

It is probably for the warm air duct for the breather. There should be a peice of duct work from the manifold up to your breather, where there was a flapper on the air inlet. It does not tie into the choke howerver. I believe that the flapper on the breather was vacum operated. But I'm sure someone will correct me if I'm wrong.

 

My '70 Renegade has that. It is for the rochester carb. Mine never had a manual choke and it also had the emmisions setup... I strongly believe it is for the carb, my hose has broken off at the manifold but it is apparent that the choke tube was connected to it at one time.

 

is this the beast ?
right at the bottom of the manifold and above the starter solenoid

 

that's it

 

My 71 did not have anything attached to it that I remember (has headers on it now). In my 71 FSM both in the fuel section and in the exhaust emission control systems they do not say anything about it or show anything:

View attachment 16827 View attachment 16828

However on the front page of a article that I have about the V-6, there is a bad picture that shows what looks like a insulated wrapped tube going from that spot up to around the base of the carb. My guess is that it was something that jeep tried for a few units or that is was something used on other applications of the V-6 then JEEPs, In that same pic. it doesn't show any of the exhaust emission heated air system that is in the book or was on mine

 

came out of the CJ5 FSM
who knows what pic they used
I'm still leaning towards choke function
curiously, the parts books shows 2 different ex manifolds for the right side of Jeepster; the footnote distinguishing the 2.....front or rear mounted steering ??
what's that got to do with the RH ex manifold ?????
no mention of the tube or used with auto choke etc etc

 

okay
so there would be a metal tube with a flare on the end that slides over this fitting and then goes up towards the carb, or another choke pipe tube ?

 

:iagree: without seeing a picture of your jeep i can tell you it is one of three things, A heat tube to choke case B vacume tube to manifold heat riser,C air injection reactor, i dont think it is B,because the heat riser on these were spring activated,and if it were C there would be 3 threded holes in the ex manifold so i think you are on the right track with choke,if you can get your hands on a chiltons for a late 1970's chevy truck it will have this setup for the choke

 

I'm going to take some quick pics of mine and show yall, then you can tell me if that is what you are talking about or not...