Garysriv Posted April 2, 2018 Share Posted April 2, 2018 (edited) Working towards getting the 65 started. Drained oil overnite, little marvel mystery oil in the cylinders. New oil/filter, good 27f battery. Cranked without plugs until oil press light went out. All good so far. Ran into a snag on the carb rebuild. It has the original 3921S AFB. Soaked the body and the secondary rod is just frozen in the body, they will not open. Tried heat, everything. Kind of "stuck" at this point. If anyone has a decent 3921 base I'm interested..... Edited April 2, 2018 by Garysriv Add (see edit history) Link to comment Share on other sites More sharing options...
1965rivgs Posted April 2, 2018 Share Posted April 2, 2018 Hi Gary, Dont know if you realize it or not but there is a secondary lockout feature on the carb when the choke is applied? Dont give up yet. Do a search on this forum using various phrases. There is a fellow named Jon who has a carb business (maybe carb king?) who authored an excellent post about how to unstick a carb. Had something to do with heating in an oven, etc, but from my experience it sounded like a very good method. Tom Mooney Link to comment Share on other sites More sharing options...
Beemon Posted April 2, 2018 Share Posted April 2, 2018 (edited) Don't apply heat with a torch, it can potentially warp the body. Take two sinks, fill one with scalding water and the other with ice water. Soak in scalding water then drop in ice water. The sudden change in heat reaction will shock the two metals (steel rod in an aluminum body) and one will expand/shrink faster than the other. This is how I saved my 56 Carter 2347S. It took only four or five dunks in the ice water to get it freed up. After every dunk, firmly grasp the rod and try to rotate it back and forth. Eventually it will give. Good luck! Edited April 2, 2018 by Beemon (see edit history) 1 Link to comment Share on other sites More sharing options...
RivNut Posted April 2, 2018 Share Posted April 2, 2018 (edited) If you'll look closely, you'll see that, unlike a Rochester, a Carter AFB has the shaft built into to the body. The AFB separates only into a body and a top, no separate base. Edited April 2, 2018 by RivNut (see edit history) Link to comment Share on other sites More sharing options...
Garysriv Posted April 2, 2018 Author Share Posted April 2, 2018 19 minutes ago, RivNut said: If you'll look closely, you'll see that, unlike a Rochester, a Carter AFB has the shaft built into to the body. The AFB separates only into a body and a top, no separate base. Yeah, I guess I meant the base in afb lingo. Link to comment Share on other sites More sharing options...
Garysriv Posted April 2, 2018 Author Share Posted April 2, 2018 39 minutes ago, 1965rivgs said: Hi Gary, Dont know if you realize it or not but there is a secondary lockout feature on the carb when the choke is applied? Dont give up yet. Do a search on this forum using various phrases. There is a fellow named Jon who has a carb business (maybe carb king?) who authored an excellent post about how to unstick a carb. Had something to do with heating in an oven, etc, but from my experience it sounded like a very good method. Tom Mooney Yes, lockout not engaged, looks like below someone has a heat/cool idea... Link to comment Share on other sites More sharing options...
Garysriv Posted April 2, 2018 Author Share Posted April 2, 2018 32 minutes ago, Beemon said: Don't apply heat with a torch, it can potentially warp the body. Take two sinks, fill one with scalding water and the other with ice water. Soak in scalding water then drop in ice water. The sudden change in heat reaction will shock the two metals (steel rod in an aluminum body) and one will expand/shrink faster than the other. This is how I saved my 56 Carter 2347S. It took only four or five dunks in the ice water to get it freed up. After every dunk, firmly grasp the rod and try to rotate it back and forth. Eventually it will give. Good luck! Sounds good I'll try it! I'm going to tell the wife it was your idea though....but there was that time she found my corvair turbo housing in the oven, so I have a history...... 1 Link to comment Share on other sites More sharing options...
Beemon Posted April 2, 2018 Share Posted April 2, 2018 2 minutes ago, Garysriv said: Sounds good I'll try it! I'm going to tell the wife it was your idea though....but there was that time she found my corvair turbo housing in the oven, so I have a history...... Get it done before she gets home! 2 1 Link to comment Share on other sites More sharing options...
Garysriv Posted April 2, 2018 Author Share Posted April 2, 2018 2 minutes ago, Beemon said: Get it done before she gets home! Went with the tablecloth! Husband of the year! Link to comment Share on other sites More sharing options...
lrlforfun Posted April 3, 2018 Share Posted April 3, 2018 OK Riviera: I've done some seriously janky things but NEVER EVER EVER EVER.......................................................AND EVER car parts in the house. Mitch Link to comment Share on other sites More sharing options...
1965rivgs Posted April 3, 2018 Share Posted April 3, 2018 Gary, Jon posted in this thread: Send him a PM and ask about his technique. Please consider posting here for others to benefit from, thanks, Tom Mooney Link to comment Share on other sites More sharing options...
carbking Posted April 3, 2018 Share Posted April 3, 2018 We went to the local Junk-Mart and purchased an ELECTRIC toaster oven to cook carburetor parts. DO NOT USE A GAS OVEN! Have freed hundreds of throttle shafts in this manner. On the other hand, when life hands you a lemon, think lemonade. You should get better fuel economy with the secondary not functioning! Jon. 2 1 Link to comment Share on other sites More sharing options...
retiredmechanic74 Posted April 3, 2018 Share Posted April 3, 2018 (edited) 18 minutes ago, 1965rivgs said: Gary, Jon posted in this thread: Send him a PM and ask about his technique. Please consider posting here for others to benefit from, thanks, Tom Mooney Check the floats with a weight Gage, they may be filling up with gas. If OK then lower the settings. Another way to free up frozen parts is to let them soak in transmission oil for a few days. Edited April 3, 2018 by retiredmechanic74 More information. (see edit history) Link to comment Share on other sites More sharing options...
Bloo Posted April 3, 2018 Share Posted April 3, 2018 4 hours ago, carbking said: We went to the local Junk-Mart and purchased an ELECTRIC toaster oven to cook carburetor parts. It also works well for cooking bearing races when assembling transmissions. Every shop should have one! 1 Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted April 4, 2018 Share Posted April 4, 2018 Also good for powdercoating small parts, though my wife complained when she found the hanger I made. 1 Link to comment Share on other sites More sharing options...
petelempert Posted April 4, 2018 Share Posted April 4, 2018 Beemon: How does the cat food figure into the carb rebuild? Just curious. PRL 1 Link to comment Share on other sites More sharing options...
Bloo Posted April 4, 2018 Share Posted April 4, 2018 How quickly we forget .... Link to comment Share on other sites More sharing options...
RivNut Posted April 4, 2018 Share Posted April 4, 2018 On 4/2/2018 at 5:20 PM, Garysriv said: Working towards getting the 65 started. Drained oil overnite, little marvel mystery oil in the cylinders. New oil/filter, good 27f battery. Cranked without plugs until oil press light went out. All good so far. Ran into a snag on the carb rebuild. It has the original 3921S AFB. Soaked the body and the secondary rod is just frozen in the body, they will not open. Tried heat, everything. Kind of "stuck" at this point. If anyone has a decent 3921 base I'm interested..... The last time I checked his website, Carbking, had a 3921 listed for sale. www.thecarburetorshop.com Link to comment Share on other sites More sharing options...
Garysriv Posted April 4, 2018 Author Share Posted April 4, 2018 3 hours ago, RivNut said: The last time I checked his website, Carbking, had a 3921 listed for sale. www.thecarburetorshop.com Yes, I saw he also has parts so he may have a rebuildable body. Also one on ebay rebuildable for $75 I'm watching. First I want to try the hot/cold thing several people have posted. Been working late this week, may give it a shot tomorrow evening. Thanks! Link to comment Share on other sites More sharing options...
KongaMan Posted April 4, 2018 Share Posted April 4, 2018 Beware of buying a "rebuildable" anything on eBay. If it were that easy to fix, the owner would have done it already. In this case, maybe "rebuildable" means you need to sleeve the shafts, fix buggered pieces, etc. rather just drop in a kit. Link to comment Share on other sites More sharing options...
RivNut Posted April 4, 2018 Share Posted April 4, 2018 If you're not restoring to a numbers correct status on your car, you can look at other AFB carburetor. Look in the chassis manual and get all the specs*. Look at where the fuel inlet is located, where the vacuum outlets are, how the kick down works, and other things like that. It could be that a 66 AFB would work for you. *Specs might include jet sizes, metering rod sizes, and other dimensions. My 64 has a 425 in it, but I run (it was available, rebuilt, and affordable) a 64 carb off of a 401. Different production numbers but the only difference between the two carbs is something like .002" in the secondary jets. The 401 carb works fine. Link to comment Share on other sites More sharing options...
RivNut Posted April 4, 2018 Share Posted April 4, 2018 I pulled out my 65 chassis manual. There were 34 different specs for the 65 AFB carbs. #3921 for the 401, #3923 for the 425 3921 3923 Low speed jet #68 #65 Idle port .200 x .030 .185x.030 Sec metering jet 120-158 120-159 metering rod 16-219 16-167 These four specs are the only ones of the 34 that are different. Link to comment Share on other sites More sharing options...
Garysriv Posted April 5, 2018 Author Share Posted April 5, 2018 11 hours ago, RivNut said: I pulled out my 65 chassis manual. There were 34 different specs for the 65 AFB carbs. #3921 for the 401, #3923 for the 425 3921 3923 Low speed jet #68 #65 Idle port .200 x .030 .185x.030 Sec metering jet 120-158 120-159 metering rod 16-219 16-167 These four specs are the only ones of the 34 that are different. Good info, gives me some options! I remember seeing the 120 jets when I took it apart. Hoping the hot/cold plan works tonite,,,, Link to comment Share on other sites More sharing options...
Beemon Posted April 6, 2018 Share Posted April 6, 2018 On 4/4/2018 at 8:31 AM, petelempert said: Beemon: How does the cat food figure into the carb rebuild? Just curious. PRL The cats don't reprimand me for working at the dinner table. Also for a quick snack. Link to comment Share on other sites More sharing options...
Garysriv Posted April 6, 2018 Author Share Posted April 6, 2018 5 hours ago, Beemon said: The cats don't reprimand me for working at the dinner table. Also for a quick snack. Must be a thing, because as I was boiling my carb last nite the cat was hanging close by. Didn't work, so no snacks. 1 Link to comment Share on other sites More sharing options...
KongaMan Posted April 6, 2018 Share Posted April 6, 2018 Might be a little more palatable if you add some carrots and potatoes. 2 Link to comment Share on other sites More sharing options...
RivNut Posted April 7, 2018 Share Posted April 7, 2018 1 hour ago, Garysriv said: Must be a thing, because as I was boiling my carb last nite the cat was hanging close by. Didn't work, so no snacks. I take it for wife was not home? Link to comment Share on other sites More sharing options...
Garysriv Posted April 7, 2018 Author Share Posted April 7, 2018 12 hours ago, RivNut said: I take it for wife was not home? Actually she was, she was giving me tips like "you need to leave it in longer before you put it in the ice water". She's a gran sport. 1 Link to comment Share on other sites More sharing options...
Beemon Posted April 7, 2018 Share Posted April 7, 2018 You went the extra effort! I just used the hot and cold water from the tap. I'm assuming its been a while, did it work out for you? Link to comment Share on other sites More sharing options...
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