The heat riser tube from the choke cover goes to a hole in the top of the exhaust manifold choke stove. There is a hole in the bottom of the choke stove that another metal line goes in and that attaches to the rubber hose that goes up to the rear of the carburetor to supply fresh air to the stove. Here's a picture of the top end of a 68 J code w/Autolite 4V;
http://i25.photobucket.com/albums/c74/tlea/8T03J0302012.jpg

 

Thank you for the response. I may not be asking the right question, With the factory air filter assembly there is a vacuum motor that works in cunjucntion with a heat sensitve by metal element that opens and close's a flap in the air filter assembly. I'm told that when the engine is cold it sucks air from the heat risor tube, When the engine warms up the flap closes and blocks the heat tube. Do you have a picture of the factory air filter connections??

Thanks

 

Though other Ford products may have had a vacuum operated snorkel flap I've never seen nor owned a 68 J code with such a feature. Just the heat shield on the exhaust manifold (incorporates the tube to the snorkel on this vehicle this year) and the snorkel. That flapper is operated by the heat from the exhaust manifold

Maybe one of these will help

 

Sorry I don't. I've got dozens of 68 J code carb/filter/manifold pics but they are all GT 350s with the oval air cleaner. Let me see if I can dig up a schematic.

 

Ok you didn't say what trans but here's stick;
http://i25.photobucket.com/albums/c74/tlea/302vacuumdiagram.gif
and auto
http://i25.photobucket.com/albums/c74/tlea/302vacuumauto.gif

 

Sorry, Its a C4 Auto. Thanks!!!!! The diagram is just what I need. I have a few more hose's to connect then I thought! There is no hose between the intake manifold fitting, and the distributer vacuum control valve. The line from the carb goes direct to the distributer, basically the distributer control valve is completely bypassed!! Would you by chance know the correct size hose for those connections??

 

I will take a picture and try to post. Thanks for all the help!!!

 

Tim I've got that diagram also but believe it is incorrect for a Mustang. The diagrams are for the C and J code generically (that system was used on some Fords)

Anyone seen one on an original car??


NEVER seen a vacuum source to the snorkel in person or in pictures on an original car (Mustang) and the Ford engine diagram indicates no vacuum operated flap. Not sure if the vacuum style will fit in a Mustang or Cougar

Looks IMHO like another Ford opps


Over the weekend I'll try and dig out the snorkel for my Calif Special..... its around here some where. Saw the heat shield yesterday

 

Tim I've got that diagram also but believe it is incorrect for a Mustang.

It could be. As I told him all my pics are from those NJ J codes with the funny oval air cleaners so I don't have any conventional air cleaner photos. It does make sense that if it had a heat shield activated flapper it wouldn't need the other style.

 

I havent done the pictures yet I will get them in this weekend. It does mention the vacuum operated type in the Hayne's 64 1/2 to 73 Mustang repair. But it just doesn't have the diagrams in it. I have found out quite a bit about my car recently, I have only had it for 2 weeks. I did find out my engine is original to the car. Engine tag decodes as " J-code 302 4v, automatic w/IMCO (improved Combustion)." dated to January of 68 and my car data plate is dated to feb 1, 1968. Not sure what the IMCO is. One of the other guys on this site filled me in on my Engine tag. Many Many thanks to all who have helped!!!!

 

IMCO is the emmissions system used in the time period. Typically the manual 68 302s used the Thermactor and the automatics had IMCO. If yours is still intact please post some pictures.

 

Okay I got some pictures, how do you post them in the message??

 

Okay I got some pictures, how do you post them in the message??

http://forums.vintage-mustang.com/showtopic.php?tid/1431524/tp/1/

 

Another way to prove you have the original engine is to check the flat plate on top of the block;behind the intake. You might find your partial Ford VIN number.

 

Thanks for the edumacation!! Let's see if I got it right!!

http://byfiles.storage.msn.com/y1pnv7yjVQ0hdILhKTUoAPBizu_WaRKflzX2bJ4DfsrKUMBx8SF3165djYcBD6pUtsj

If this works well, then I'll put some more in!

 

I couldn't get the pictures to show. I'll have to read the whole guide or something. Here is a link to my msn site with all the pictures of my 68 so far.

My 68 Mustang Coupe!

 

I finally figured out what I was doing wrong with the pictures. Here are the pictures I have of the Engine so far. It is a little dirty so please be gentle.
http://memimage.cardomain.net/member_images/8/web/2660000-2660999/2660604_4_full.jpg
http://memimage.cardomain.net/member_images/8/web/2660000-2660999/2660604_5_full.jpg
http://memimage.cardomain.net/member_images/8/web/2660000-2660999/2660604_6_full.jpg

 

I finally figured out what I was doing wrong with the pictures. Here are the pictures I have of the Engine so far. It is a little dirty so please be gentle.

I've never seen an air cleaner with that snorkel on a Mustang. What is the history on the car?

Looks like a few things have been changed and the air cleaner and snorkel are a very different finish and wear than the rest of the engine IMHO

 

I just bought this car 2 weeks ago, But here's what I have found so far thanks to everyone in this forum.

When I bought the car here's what I was told was done:
New gas tank, Radiator, front suspension, rebuilt C8ZF-D Carb.

Found Info:

Vin- 68 coupe 302 4v sunlit gold c4 auto Feb 1, 1968

Engine tag- 302 4v IMCO built January 1968.

The haynes manual has some information on a vacuum operated snorkel for the mustang.

BUT!! No one on this site has ever seen a mustang with this snorkel?? Now I put all this information together with the fact that with the air filter for a 68 mustang installed in this breather assembly the lid does not close completely (Lid is not Warped), I'm begining to think this is not the original breather/snorkel.

You are right about the paint i never really noticed before but is different then the rest.

 

my 68, 302, 4bbl, had a snorkel and heat shield, but they were so badly rusted i couldn't save them.
They look exactly like the ones here in the pics.
My 68 was built in early Jan. so maybe it had some left over 67 parts???
dunno

J

 

J did yours have the vacuum assembly on it as well?

 

My 68 was built in early Jan. so maybe it had some left over 67 parts???

The 67 didn't use a snorkel like the 68 design and a car built half way through production (production for 68's would have started in Sept 67) is a little late for "left overs"

The haynes manual has some information on a vacuum operated snorkel for the mustang.

Likely just taken from the Ford reference already posted. Plenty of mistakes in Ford and other documentation

As promised here is a couple of pictures of what I've always seen. From my 68 J code Mustang (good excuse to clean and paint them