how do you install a new choke tube in manifold where can I get one, or do you make one,.How do you get old one out. I'm aware of twisted heat piece in manifold. Any help appreciated.

Views: 1656

Reply to This

Replies to This Discussion

Nice illustrations. Added to Help page under - Intake Manifold - Choke Tube Replacement

Jason i accidentally deleted this while viewing it on my smart phone at night. Is there a way to restore the pictures?

Jeff, No there is no way I can restore once you have deleted. Why not post another stand alone article and we can link to it instead of a reply within the article. Be sure to group all pictures together in the main post. The only other things I would add would be your source for the stainless tube and the dimensions. I bought like a 3' section of it off eBay way back but cannot find the info or dimension specs.  There are also a couple of grades of stainless, one is more corrosion resistant and that would be good info to post also.  We can also run it in the next newsletter under Tech Tips. So... please repost while still fresh up in the grey matter... and stay away from that delete button!

hi, I'd be very interested in your step-by-step on replacing that internal heat tube.  did you ever restore the pictures that you deleted?  thanks, Nile

A slightly better picture of the finished installation.

So when your done you should see the choke tube like in this pic ?

The choke tube should be visible and with no cracks.  I pressure check mine when I take an intake off.  Fire up the compressor and put the rubber nipple to the blower on one end, and plug the other with my finger. You will hear a leak in the tube if it is cracked.  After 50 years, it is just best to replace the choke tube.

This first picture shows the old cracked tube inside the manifold passageway. The last picture (bottom) shows the new tube in the same location.
The twist baffle sits inside the tube and creates air flow turbulence to increase efficiency of heat transfer. Once you start to drill out the old tube the baffle should slide out but it may be stuck with csrbn deposits hence the liberal use of penetrating oil.

The main reason to replace is to prevent an unferhood fire from hot exhaust gas getting into the carburetor housing.
Thank you Jeff, I am suspicious that mine is leaking because I replace my intake manifold gasket and I'm still hearing a leak when accelerating
My manifold also had the beginning of a hairline crack underneath so I decided to replace it and wound up doing this job twice!
In fact if look at the first (top) picture you can see this hairline just below the manifold heat passage opening.

Couldn't tell if it was a casting mark or impending fracture so decided to replace.



  • Add Photos
  • View All


differential seal

Started by Al zink in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 8 minutes ago. 1 Reply

Can anyone provide me with a good source for a differential seal for my 63 cadillacThanksContinue


Started by Mark Bartlett in 1963/64 Cadillac Specific Discussion. Last reply by Mark Bartlett 5 hours ago. 26 Replies

Hi I am new to this Discussion  I currently purchasing a 64 Deville convertible and It has bias ply tires that are 15 year old  they have L-78-15 tires and would like to put on radials . Question …Continue

The amazing Th-400 trans still going strong in 2023 in drag racing circles

Started by Tony and Ginny 429 in 1963/64 Cadillac Specific Discussion 7 hours ago. 0 Replies

I just read an article about a drag race engine producing 2500 plus  HP using a TH-400 trans behind it Sure the trans was modified some to handle that kind of power but was still a big ( good )…Continue

Tags: trans, TH-400, The

Transmisson Rebuild Time?

Started by Logan Robb in General Discussion. Last reply by Tony and Ginny 429 8 hours ago. 6 Replies

I've posted about this issue in the past and I thought I had it resolved. It would appear I do not as it has reared its ugly head again. My TH400 in the 64 Fleetwood has an intermittent problem of…Continue

Blog Posts

Lower Front End Ball Joints

Posted by Logan Robb on May 11, 2023 at 9:04am 7 Comments

Good Morning all! 

I took the 64 into the shop to have some adjustments completed and in the process decided to have the lower ball joints replaced as was recommended the last time I had it in. I ordered the parts and came into the shop. They quoted me nearly $500 to replace those lower ball joints requiring nearly 4hrs of labor. Now this is a reputable shop and they know me by name here and they will continue to get my business. I am just questioning what on earth is…


1964 power steering sector rebuild

Posted by CHRIS CARLSON on March 20, 2023 at 11:32pm 3 Comments

 I'm having my steering sector rebuilt, and considering changing it from 20-1 ratio 4.2 turns lock to lock to 3.5 turns lock to lock @ 16-1 ratio, If i change from a 3 1/4" box to a 3" box i could have a 14-1 Ratio steering response would be faster, shorter distance to turn the wheel to get a response,   has anyone done this? and how do you like it? thank you

1964 Daville dashboard clock

Posted by Willem Bol on March 13, 2023 at 11:33am 2 Comments


Can somebody help me finding a dashboard clock  for my 1964 Cadillac DeVille Convertible?

Thank you in advance,

Willem Bol

The Netherlands

Does anyone know where I can get the bushings for AC compressor mount on the 429?

Posted by Robert Schles on February 21, 2023 at 11:45am 2 Comments

I've looked at the usual rubber sources but couldn't find any. 


  • Add Videos
  • View All

© 2023   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service