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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2006 Posts: 423 'Bolter | | 'Bolter Joined: May 2006 Posts: 423 | My "new" 235 came with a Rochester B with an auto chock that I am not using. I like having the manual choke on the dash, so yesterday the extra auto choke hardware came off, and I will be making some simple hardware a lá the old Rochester B to hook to the manual cable.
The auto choke mechanism had a steel vacuum line running to it from the base of the carb. I have tried to pull it out from the base, but no luck. How might I remove this vacuum line and plug the hole? Can I just stuff JB weld in the open end and leave the tube in place?
Karl
It may not be the easy way, but it is the Cowboy Way - Ranger Doug Beware of the stories you read or tell; subtly, at night, beneath the waters of consciousness, they are altering your world. - Ben Okri 1953 Chevy 3100 1960 Volvo PV 544 1941 Chevrolet Special Deluxe | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Can you post a link to a photo of that part of your carb?
| | | | | Joined: Apr 2014 Posts: 924 Shop Shark | | Shop Shark Joined: Apr 2014 Posts: 924 | I think he's talking about this line. Brad
Last edited by ClaudeTheTruck; 09/21/2014 2:51 PM.
Wrench Fetcher, PhD | | | | | Joined: May 2006 Posts: 423 'Bolter | | 'Bolter Joined: May 2006 Posts: 423 |
It may not be the easy way, but it is the Cowboy Way - Ranger Doug Beware of the stories you read or tell; subtly, at night, beneath the waters of consciousness, they are altering your world. - Ben Okri 1953 Chevy 3100 1960 Volvo PV 544 1941 Chevrolet Special Deluxe | | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | If you wish to remove the pressed tube from the base (throttle body), PROVIDING THE THROTTLE BODY IS CAST IRON:
(1) remove the throttle body from the rest of the carburetor
(2) heat the throttle body in an old oven to the maximum temp of the oven
(3) remove the throttle body from the oven, and using an acetelyne torch, heat the are around the tube until cherry red
(4) SET THE THROTTLE BODY ASIDE AND GO DO SOMETHING ELSE FOR 30 MINUTES!
(5) once the throttle body has completely cooled (NO QUENCHING ALLOWED), find a screw or nail that will just fit inside the tube.
(6) with the object inserted into the tube, clamp the tube and object with a pair of vise-grips.
(7) gently turn the vise-grips, the tube will come right out
(8) DON'T USE JB-WELD! if you are a fisherman, find a split shot lead sinker somewhat larger than the hole, and with a drift punch and hammer, insert the lead into the hole. If you are not a fisherman, surely you have a friend that is; or a $2. pack of sinkers from a discount store.
DO NOT USE THIS TECHNIQUE ON ALUMINUM OR ZINC ALLOY BODIES!!!
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: May 2006 Posts: 423 'Bolter | | 'Bolter Joined: May 2006 Posts: 423 | Thanks Jon.
What's to do when one has an aluminum or zinc body? Can one stuff some lead into the end of the tube? Maybe cut it off first?
I do have a lot of lead on hand in my business, that won't be a problem.
What I do not have is a torch. Hmm
Karl
It may not be the easy way, but it is the Cowboy Way - Ranger Doug Beware of the stories you read or tell; subtly, at night, beneath the waters of consciousness, they are altering your world. - Ben Okri 1953 Chevy 3100 1960 Volvo PV 544 1941 Chevrolet Special Deluxe | | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | The Rochester BC throttle body should be cast iron. I posted the caviat to prevent some enthusiast from trying this method on other carburetors.
There ARE ways to remove the tubes from aluminum or zinc alloy; but require special tools, lots of practice on junk castings, OR a lot of luck. With no offense meant, rather than get someone in trouble, will not answer this question.
Stromberg, Zenith and Rochester used lead balls of varying sizes. Carter used aluminum and brass tapered plugs.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: May 2006 Posts: 423 'Bolter | | 'Bolter Joined: May 2006 Posts: 423 | It is cast iron. Would a propane torch raise the temp to cherry red?
It may not be the easy way, but it is the Cowboy Way - Ranger Doug Beware of the stories you read or tell; subtly, at night, beneath the waters of consciousness, they are altering your world. - Ben Okri 1953 Chevy 3100 1960 Volvo PV 544 1941 Chevrolet Special Deluxe | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | It is cast iron. Would a propane torch raise the temp to cherry red? I would think so but it'll take longer. After doing some more checking maybe not.
Last edited by Tiny; 09/21/2014 9:23 PM.
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| | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 |
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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