Great video demystifying carburettors that are essential to the Alfa twin cam engines music and driveability - great to see you back on you tube and yes car nerd here :)
Just a note ... It's better to put butterflies in before the choke and venture as you can hold the carb up to the light to see that the seating is perfect. To aid this semi tighten screws in butterflies and lightly pull shut and tap the shaft one way and then the other then fully tighten them. Note:- When the screw is just at point of friction tightening turn 90deg more to get torque set correct. Always use lock tight on these screws...! Great job ... Well executed..
Thanks for removing the cloak of mystery surrounding these enigmatic (well formerly enigmatic) carbs. The Shakespearian tone is a real bonus especially since mine is going in a japanese car.
Personally I hope you get the time to do more in this style. I really felt that I learned something and the whole pace of this film was almost like meditation. Thanks J.B...
I was just looking into sending my Berlina's DCOE40's out for a rebuild. Instead, I'm ordering the parts. This was a nice inspiration. Don't mind taking on any project but I've usually left the carbs to a pro. Not anymore. Appreciate the content, Jethro!
"I'm no expert". After viewing both your Weber carburettor dismantling and reassembly of the painstakingly, cleaned components. I'm sorry to contradict you, but you now clearly are an expert. Thanks greatly for sharing your phenomenal insight on these 105, etc series engine's I'm now very confident in taking my semi-restored 1967, Berlina 1750 to another dimension of attention.🧐
Absolutely brilliant Jethro! Thanks for this excellent explanation and entertaining video. I’m finally beginning to grasp the inner workings of the Weber DCOE carburetor. What a great series of video’s you’ve put out. They really help me to understand my Giulietta Spider! Keep up the great work. Grazie mille!
Jurjen Harskamp Wow the Giulietta Spider is one of my dream Alfas. I think it’s one of the greatest designs ever. Hopefully one day I can get one for myself.
Good to have you back Jethro! I really enjoy this 'how-to' style of video. Your previous carb video gave me the confidence to rebuild the twin Solexs on my twin cam Fiat Abarth so many thanks for such quality productions.
This has to be one of, if not the best DCOE video on all of RU-vid. Well done! Just got an old set of triples for my Datsun, now I’m ready to start rebuilding!
Thank you for sharing your knowledge! I'm rebuilding a Weber 45 DCOE for a turbocharged 1965 Chevy Corvair Corsa that will be modified to become a progressive carburetor for fuel economy when cruising and extra horsepower on boost. This is extremely helpful!
Awesome vid. I've just done the same to a pair of Dellorto dhla40's for my MK2 Cortina. Funny enough they came off 2 ltr Alfa twincam. I'd love to see a video of how you clean up all the components. Blasting the body and cleaning the Jets etc. Mine have never looked as mint as yours do!
Excellent video, you've motivated me to drag out a couple of of DCOE's that were hiding under the bench. I think they had mismatched chokes IIRC and need some rebuild kits. A job that shouldn't be rushed for sure; I will say you're a brave man to do it on that bench with a canyon running down the middle! Sort of a black hole that eats small parts... Looking forward to the next video.
Fantastic work on that. I agree on your approach that understanding what it does is much more important that just step by step, putting it together. Keep them coming ;)
I have a new found appreciation for the Weber, what a intricate and wonderfully designed bit of mechanics. As ever, thank you for sharing your knowledge, your presentation style is just right, even with the eye shadow ;) Cheers Jethro!
You are simply awesome!....Totally enjoyed the entire video, I am sure I will be watching and studying it several times. Great job. I will be looking for all your videos on these carbs. Thank you so much.
Another brilliant and informative video!!! My S1 Spider Veloce is coming along slowly and I also share your frustration on the engine rebuild. Now looking forward to working on the carbs as you have a nice way of making it look super easy without cursing once 🤣😎 Keep up the great work!!
You're back. I thought you quit making videos. This is the first time I was notified of a video, 2 months old. Good informative video. I guess I am a nerd, watched it all. Nice to sit back and just watch the video and not having to mute crappy music that ruins a video. I wll catch up with the other videos in your list.
As I started this video, I was thinking there's no way I'm going to understand this. Just too many parts. So intimidating. But, as you'd mentioned in a reply to a comment I made on one of your other videos, once you understand each circuit and how it goes together and functions, it's not intimidating at all. I'm going to look for a quality gasket kit--and rebuild mine here soon. Thank you so much, Jethro! I'm also going to look and see if you have a Patreon account and subscribe. Huge fan. And apparently a huge car nerd, too. LOL
Jethro Bronner...well I take quality over quantity any time - keep up the great work. In the meantime I was following the Alferrari Project by Homebuilt by Jeff, where he puts an engine from a Ferrari 430 into an Alfa 105😉
Among special tools I would include that dental tool looking instrument that you used to pull various springs. I've enjoyed all ur videos... I'm headed over to ur Patreon page. I'll gladly pitch in to keep this content going!
Great video! Really helped me understand what a carburetor actually does!! One thing that would really step up your video production would be a lav microphone on something like a Zoom H1. That would be a cheap way to get rid of that background hiss.
Welcome back. You HAVE been missed. Great video!! I do have a question. I need to get my 67 Duetto back on the road so I can sell a GTV to fund some other cars. I've never rebuilt Webers. Previously I've rebuilt SU's and Dell Ortos (among other carbs) and both of those required i install oversize throttle shafts and machine or lap to eliminate leaks coming through a worn throttle shaft, the old spray ether on the side to see if the revs increase trick. Are worn throttle shafts ever and issue on Webers or do the replacement bearings generally address a potential wear point.? Any other maladies I should be aware of. Again, we've all missed your clips
Steve Wuertz The steel shafts on the Webers don’t wear, but the brass ones do wear and twist. That’s why I changed to the DCOE28s on this car, because the 27s were in such poor shape.
this is brilliant please keep going. i have a gtjuniorn1975 unificato with those on. i guess sooner or later i'll have to go back to this vid ;) do more vids!
I have Italian 2 40DCOE 27's & 1 40DCOE 2 for a triple on a TR6 2500 cc motor. What's the difference in the bodies? Not the jets and stuff. I can change all that. Progression holes maybe? Thanks. I love your vids. Very clear.
Jethro, again I want to thank you for posting this. I rebuilt two dcoe 40s for my Alfa GTV. I do have one question and it is in the use of the many rubber O-rings that come in the kit. The instructions that came with my kit was only for setting the float swing. Nothing about actual assembly. I was able to use all the O-rings on the eternal screws. The only place on the interior of the carb was the screw that covered the hole with the ball bearing and weight. I did not use them on any of the jets, so i had a few left over. Is that okay? Or should every screw, jet, etc. have an O-ring.
There will always be left over o rings. I don’t use any o rings inside the carburetor, but depending on the model and age of your carburetor there can be quite a lot on the outside. As long as you have the external plugs and screws set with o rings you’ll be fine.
Jethro, great video and I can't wait to dive into reassembling my dcoe 40s that just came back from vapor blasting. But I may have overlooked something. I got my FL108 rebuild kit from Classic Alfa but I thought it included new throttle shaft bearings. It did not. Are these something I can source locally? I know I watched numerous videos on the carbs and one actually put a caliper on the bearing to get the inner and outer diameters, but I just can't find that. Thx
I believe it’s a 607 2-RS bearing, which is pretty easy to get at any bearing and seals supplier. I did put up another video where I mentioned the part numbers, it might have been that longer video where I did 2 of these carburetors.
I am using your video as a guide for reassembling my carb and it is working great. I have two questions. Is there a detailed instruction sheet regarding where the replacement washers and o-rings go? My kit only came with instructions for setting the float. It is a bit of common sense but there are a few washers I am not sure about. And lastly, I complete tore down my carb to get it blasted, but I only removed the choke assembly. I did not disassemble it. When I reinstalled it, it does seem to lock up a bit. It moved freely when off, but when installed it felt stuck. I had to use a bit of force to "break it free", but it does seem to lock a bit. Not sure why. Thx
Great video, love the way you are so relaxed presenting this video. Where should you buy a rebuilding set , Amazon , eBay ??? Don't know if they are reliable , what would you suggest where to get this kit ? Thanks so much :-))
My DCOE 76 77 has a cup washer and an o'ring under the spring on the idle mixture screws, I have yet to see another carb that has those, do you thing the previous owner put them in or Alfa? I also have o'rings on my idle jets too, I don't see that you have those either. I must have special Weber's. Should I take them off?
What will happen if you use a 000 discharge valve. I now have a 40. Will this give me more fuel at the initial push on the throttle. I have a lack of power just as I'm letting the clutch out like it needs more fuel ???
Good one! And I feel just the same. So desperately uninteresting to drive a modern digatally controlled car when you could have been fiddling with one of those...
I always connect them just because I like everything to work. But I've never had to use them to get the car fired up. Two pumps of the accelerator peddle is usually enough to get an Alfa on DCOEs to fire up.
Great videos. I noticed you have a Fulvia Coupe 1st series in the garage. Would you send me the link(s) for any video showing work you might have done? Thanks.
As always, excellent Jethro! Did you learn all of this through hands on and a book or a course, school etc? I am a sound engineer and this reminds me of the dynamics and comprehension on or of doing sound. Mixing the air and fuel is a precise formula yet it is (or at least it seems) kind of organic as well. In that you can follow a recipe but to really know how to cook or bake (or mix) you need to comprehend the needs of why you are doing what you are trying to do as well as the characteristics of the ingredients both alone and when mixed with others. Too many metaphors LOL.
Greg Wayne Yeah I’ve mostly learned this through hands on work, and purposefully taking things apart to see how they fit together. I’ve also read a lot of articles about this series of carburetor now. I like the analogy of comparing mechanical work to music production, it can be a bit of an art sometimes.
Hi Jet, Would it be possible to do a vid on cleaning up the aluminium in fact to all the aluminium components. ie carbies , manifolds, complete engine really... And finally the diff and gearbox... This is one of the factors that delivers a quality restoration from the cleanliness point of view.? Cheers . By the way are you in uk? I'm trying to work out your accent...ha..
He's South African. I think he usually has them powder blasted; this is typically how most restorers do it because sorting them by hand is a pain in the arse. You obviously need to take huge care with cleaning them afterwards lest any of the blast media ends up in your shiny new engine...
Joe Gardiner I find if you use a 2mm needle or pin punch it comes out fairly easily. If you can’t find a 2mm punch a you can use the back of a 2mm drill bit to knock it out. I generally re use them.
