The heater valve from the manifold you say is a one way flapper. Mine allows air flow both ways. I will get into it with the help of your video THANK YOU!
A tale of two S.U.'s or why you need to understand how an AED works: I had a 1972 series 1 XJ6 and following a complete head overhaul, decided to replace the Stromberg stock carbs (I believe the North American spec cars had Stromberg as standard) with 2 " S.U.'s. I had hoped to find a triple set-up as used in the e-types but was unsuccessful. The manifold and carbs I did find were off an earlier 420 and came equipped with an AED. My '72 XJ had a pull cable choke so there was no information on the AED in my workshop manual. Not to be deterred, I went ahead with the conversion with the thought I would sort it all out later. I embarked on a 1600 mile road trip the day after completing the valve job/carb upgrade. The outward bound part of the trip was fraught with carb problems as I tried to tune them on the road. Nothing was successful in getting them to run smoothly or provide the performance I expected. Finally, while on the return trip, I had made a stop at a factory in Connecticut ( I lived outside of Toronto at the time) on behalf of my employer. While there, as I went to move my car at one point, I was informed by a screaming factory worker that my car was on fire. When I popped the hood, I discovered indeed the engine bay was ablaze. The AED had begun dumping raw fuel on the starter motor - a bad mix at any time. After a panicked few minutes as I found a fire extinguisher in the factory (nobody seemed to know where they were), I got the fire out. I was now faced with a torched engine on a Saturday afternoon in an area not known for classic British car parts and service. A few phone calls later determined I was on my own if I wanted to be back on the road anytime soon. I proceeded to field strip and rebuild the carbs and almost all of the other rubber, plastic and wire stuff in the general vicinity of the right side of the engine bay. I had to pull out windshield washer lines to make new vacuum hoses; re-melt and hand form the plastic damper caps on the carb domes; borrow a fuel line from the second fuel tank to patch up one in the bay; and rewire a few essential things. My fancy dual foam high performance air filter assemblies were toast (literally). Having determined the AED was at fault, it found itself left out of the rebuild and is still likely in the woods there in Connecticut. Fortunately, having owned British cars before and this XJ6 for about two years at this time, I had learned to carry my tool kit and some spares where ever I went. It took about three hours or so but when I turned the key, it started right up. A few more minutes to balance and tune and I was off. Surprisingly, the car ran faultlessly all the way home and delivered the performance gain I had expected from the 2" S.U.s.
I've recently come across your channel Adam and have to say it is fantastic. this video in particular has helped me enormously to get my Daimler running. You obviously take a lot of pride in your content and the way it is presented as it is so well done. I have lots do on my Daimler and will put your videos into practice....!
I mostly work on Triumphs but a chap asked me to look at his Daimler Sovereign. The pipe had a decent sized rust hole in it and was only half insulated plus the previous numpty had jammed the AED float needle closed after fitting a service kit! I’ve rebuilt the AED again, made a new stainless steel pipe from the manifold to the AED and insulated it, unfortunately I wasn’t aware of the “here be dragons” on the needle lift screw and I completely dismantled the whole unit! 🙄 The car at least now bursts into life but sputters out straight away. Thanks to your info I now know that I’m close and which adjustments to make to what and why. Thank you! 👍
@@LivingWithAClassic My series 3 has this AED. It is not working at the moment and is bypassed. do not know whether to change to a manual choke or not? Noel in Ireland
Thanks for this detailed video. I have a 1976 Daimler sovereign 4.2 which the previous owner fitted a new top and didn’t set it up properly . Your video has helped me understand how this AED works 👍😁
I´m really impressed by your video of the AED, saw it and went to the garage to fix it on my sons xj6 -71. I also found that a rubber diaphragm was cracked, even though it felt smoth before dismantle. Luckily we in Sweden have "Joes garage" that can supply spares. I need to see more of your videos. All the best from Nils
Great video Adam! My AED isn’t working properly at the moment. No problem last couple of years but after a long winter break it started giving me trouble. Mixture doesnot seem to be right and running idle just doesnot work with a cold engine. If I keep revving until the engine starts running warm and obviously the AED is bypassed, engine runs smooth again.... Looking at your video, several causes are possible. Better start taking a closer look first!
Hi Adam, great staff like always. I am a pretty new XJ6 S2 -74 owner and have been watching your videos and these are very informative. I have problems to start the engine when it is warm. The car also smells gasoline quite a bit when trying to start it and also after driving from meters away. I guess these both problems relates to AED misfunction. If not would be nice if you make a video that covers the issue with strong gasoline smell as I have read from some Jag forums that others are having same problems with smell, but just like in my case, can't find the reason as nothing seem to be leaking.
Great Explanation Adam, thanks for that! I am a new MK II 3.4 Owner and it happens now, that this choke is engaged when the engine is hot. I can hear it "slurp". It slightly looks different, but probabely does the same thing, right? My choke has two cables attched to the top. What do they do ? It has a little Pump-Stick too, what is that for? Prefloating? Thank you for your Answer, I really hope to fix that soon, so I can go for my first long drive.
Hi Adam, can you do a video on converting auto to manual choke for daimler xj6 4.2 1978. Also a video on how to take the rear calipers off. Thanks. Your videos are really helpful.
ones i had a serie 2 and after a vacation the motor cabinet was open i closed every thing before the vacation to Denmark and all the spark plug leads where pulled out and the aed was molested the top was missing i had found the top on the back of the car on the ground i put every thing back but it did not work so i remade it for a Manuel temperarely and was looking for another one and for 250euro + return the old one in Holten (a jaguar parts + cars) in the Netherlands
Hej Adam, tack för en jättebra film. En fråga, ska man inte byta membranet vid huvudventilen när AEDn ändå är demonterad och isär? Och hur gör man det? /Daniel
a complete re-designe from the earlier ones in the 60's. it seems to have addressed a number of deficiencies in the previous design. and there were Pilllllenty of the them. :)
IMO, car manufacturers the world over never really solved the problem posed by an engine that demanded a variable air-fuel ratio dependent on environmental factors. in fact, it was never effectively resolved until the EFI systems became commonplace on all cars. then, the issue became what is a essentially a non-issue as EFI systems are constantly monitoring emissions and adjusting, if necessary, the fuel/air ratio. and cold start issues are addressed as part of that process. it wouldn't surprise me if anything associated with a cold start is even in modern EFI software. i've always preferred a simple manual choke cable and knob on the dash. (truth is, i'd prefer manually adjustable timing and idle knobs/levers too, but those were passe starting in the early 30's) but once the advertising departments at major car manufacturers deemed the automatic choke a sale necessity, engineers were forced to come up with something, and sadly, they never really figured it out...
This is by far the most sophisticated automatic choke. It varies with temperature both fuel air mixture and engine speed. It is the closest to fuel injection I’ve seen on a carbureted car
Hi, i have a XJ6 Series 1 with the HS8 carbs, it would be nice to rebuild it to manual choke, not the AED manual but the one that lowers the main jet as you said, where to buy? :D
@@LivingWithAClassic and nothing in BL cars working right, I experienced that I must change the mixture of that AED and also SU carburetors in each season. Now it is about 8 years that I stopped buying British classics because of those non stop problems.
Original SU AED is available from SNG Barratt in UK. Price £391 + VAT. Barratt's also do what they call an "uprated alternative" for £107 +VAT but currently out of stock.
The heater valve from the manifold you say is a one way flapper. Mine allows air flow both ways. I will get into it with the help of your video THANK YOU!
A tale of two S.U.'s or why you need to understand how an AED works:
I had a 1972 series 1 XJ6 and following a complete head overhaul, decided to replace the Stromberg stock carbs (I believe the North American spec cars had Stromberg as standard) with 2 " S.U.'s. I had hoped to find a triple set-up as used in the e-types but was unsuccessful. The manifold and carbs I did find were off an earlier 420 and came equipped with an AED. My '72 XJ had a pull cable choke so there was no information on the AED in my workshop manual. Not to be deterred, I went ahead with the conversion with the thought I would sort it all out later.
I embarked on a 1600 mile road trip the day after completing the valve job/carb upgrade. The outward bound part of the trip was fraught with carb problems as I tried to tune them on the road. Nothing was successful in getting them to run smoothly or provide the performance I expected. Finally, while on the return trip, I had made a stop at a factory in Connecticut ( I lived outside of Toronto at the time) on behalf of my employer. While there, as I went to move my car at one point, I was informed by a screaming factory worker that my car was on fire. When I popped the hood, I discovered indeed the engine bay was ablaze. The AED had begun dumping raw fuel on the starter motor - a bad mix at any time.
After a panicked few minutes as I found a fire extinguisher in the factory (nobody seemed to know where they were), I got the fire out. I was now faced with a torched engine on a Saturday afternoon in an area not known for classic British car parts and service. A few phone calls later determined I was on my own if I wanted to be back on the road anytime soon.
I proceeded to field strip and rebuild the carbs and almost all of the other rubber, plastic and wire stuff in the general vicinity of the right side of the engine bay. I had to pull out windshield washer lines to make new vacuum hoses; re-melt and hand form the plastic damper caps on the carb domes; borrow a fuel line from the second fuel tank to patch up one in the bay; and rewire a few essential things. My fancy dual foam high performance air filter assemblies were toast (literally). Having determined the AED was at fault, it found itself left out of the rebuild and is still likely in the woods there in Connecticut. Fortunately, having owned British cars before and this XJ6 for about two years at this time, I had learned to carry my tool kit and some spares where ever I went.
It took about three hours or so but when I turned the key, it started right up. A few more minutes to balance and tune and I was off. Surprisingly, the car ran faultlessly all the way home and delivered the performance gain I had expected from the 2" S.U.s.
I've recently come across your channel Adam and have to say it is fantastic. this video in particular has helped me enormously to get my Daimler running. You obviously take a lot of pride in your content and the way it is presented as it is so well done. I have lots do on my Daimler and will put your videos into practice....!
I mostly work on Triumphs but a chap asked me to look at his Daimler Sovereign.
The pipe had a decent sized rust hole in it and was only half insulated plus the previous numpty had jammed the AED float needle closed after fitting a service kit! I’ve rebuilt the AED again, made a new stainless steel pipe from the manifold to the AED and insulated it, unfortunately I wasn’t aware of the “here be dragons” on the needle lift screw and I completely dismantled the whole unit! 🙄
The car at least now bursts into life but sputters out straight away. Thanks to your info I now know that I’m close and which adjustments to make to what and why.
Thank you! 👍
I plan to buy an XJ6 S3 so even if this video is not related to an S3 I still enjoy to watch it. Good job as always!
Thanks for watching Raul!
@@LivingWithAClassic My series 3 has this AED. It is not working at the moment and is bypassed. do not know whether to change to a manual choke or not? Noel in Ireland
Thanks for this detailed video. I have a 1976 Daimler sovereign 4.2 which the previous owner fitted a new top and didn’t set it up properly . Your video has helped me understand how this AED works 👍😁
Glad it helped
Reallygood and informative! Looking forward to the episode explaining the old ones from MK2/S-type.
Thank you! That version is much simpler in operation.
They should give You like a medal for videos like this - thank You very much
I'm glad you enjoyed it!
I´m really impressed by your video of the AED, saw it and went to the garage to fix it on my sons xj6 -71. I also found that a rubber diaphragm was cracked, even though it felt smoth before dismantle. Luckily we in Sweden have "Joes garage" that can supply spares.
I need to see more of your videos.
All the best from Nils
Excellent.Have flooding problems, taken apart twice [but must have done it wrong] now I understand more will buy kit and try again. Many Thanks.
Wow--absolutely fascinating! Had no idea these existed. A mini-carb actuated by (lack of) heat rather than a throttle cable. Clever.
They are very fascinating inside! Thanks for watching 😊
Thanks Adam, mine doesn’t work at all so I bypassed so the car is very har dot start when it’s cold. This video will help a lot.
I'm glad the video can help. SUs really need some type of choke to start
Yes they do....
I've never seen one before so it was really interesting to see one inside and out.
They are pretty neat! Something this complicated and fully mechanical I find very interesting.
Amazing movie
Thank you so much for all useful information. I have always problem with this part.
Thanks for watching 😊
Great video Adam! My AED isn’t working properly at the moment. No problem last couple of years but after a long winter break it started giving me trouble. Mixture doesnot seem to be right and running idle just doesnot work with a cold engine. If I keep revving until the engine starts running warm and obviously the AED is bypassed, engine runs smooth again....
Looking at your video, several causes are possible. Better start taking a closer look first!
I would start by checking the diaphram if it was working before. Thanks for watching!
Living With A Classic thx...tips on removing the carb? Including the support i saw om your video...difficult to reach
Hi Adam, great staff like always. I am a pretty new XJ6 S2 -74 owner and have been watching your videos and these are very informative.
I have problems to start the engine when it is warm. The car also smells gasoline quite a bit when trying to start it and also after driving from meters away. I guess these both problems relates to AED misfunction. If not would be nice if you make a video that covers the issue with strong gasoline smell as I have read from some Jag forums that others are having same problems with smell, but just like in my case, can't find the reason as nothing seem to be leaking.
Great Explanation Adam, thanks for that!
I am a new MK II 3.4 Owner and it happens now, that this choke is engaged when the engine is hot. I can hear it "slurp". It slightly looks different, but probabely does the same thing, right? My choke has two cables attched to the top. What do they do ? It has a little Pump-Stick too, what is that for? Prefloating?
Thank you for your Answer, I really hope to fix that soon, so I can go for my first long drive.
Very well explained, on mine this part is missing
Hi Adam, can you do a video on converting auto to manual choke for daimler xj6 4.2 1978. Also a video on how to take the rear calipers off. Thanks. Your videos are really helpful.
Really looking for a video about electric chokes... As i have to deal with one on my JAG too, it seems not to work properly...
ones i had a serie 2 and after a vacation the motor cabinet was open i closed every thing before the vacation to Denmark and all the spark plug leads where pulled out and the aed was molested the top was missing i had found the top on the back of the car on the ground i put every thing back but it did not work so i remade it for a Manuel temperarely and was looking for another one and for 250euro + return the old one in Holten (a jaguar parts + cars) in the Netherlands
Hej Adam, tack för en jättebra film. En fråga, ska man inte byta membranet vid huvudventilen när AEDn ändå är demonterad och isär? Och hur gör man det? /Daniel
Ja det är en bra ide att byta den om den är dålig. Ett tag var det inte så lätt att få tag i nya men nu verkar det inte vara något problem.
a complete re-designe from the earlier ones in the 60's. it seems to have addressed a number of deficiencies in the previous design. and there were Pilllllenty of the them. :)
Once set up correctly these do work well
IMO, car manufacturers the world over never really solved the problem posed by an engine that demanded a variable air-fuel ratio dependent on environmental factors.
in fact, it was never effectively resolved until the EFI systems became commonplace on all cars. then, the issue became what is a essentially a non-issue as EFI systems are constantly monitoring emissions and adjusting, if necessary, the fuel/air ratio. and cold start issues are addressed as part of that process.
it wouldn't surprise me if anything associated with a cold start is even in modern EFI software.
i've always preferred a simple manual choke cable and knob on the dash. (truth is, i'd prefer manually adjustable timing and idle knobs/levers too, but those were passe starting in the early 30's) but once the advertising departments at major car manufacturers deemed the automatic choke a sale necessity, engineers were forced to come up with something, and sadly, they never really figured it out...
This is by far the most sophisticated automatic choke. It varies with temperature both fuel air mixture and engine speed. It is the closest to fuel injection I’ve seen on a carbureted car
Thank you
Hi, i have a XJ6 Series 1 with the HS8 carbs, it would be nice to rebuild it to manual choke, not the AED manual but the one that lowers the main jet as you said, where to buy? :D
I belive SC parts has the kit on their website
Burlen in England ..... Rebuild and calibrate these ...... And SU carbs..... Check them out
What's the difference between this AED and a fuel pressure regulator?
Not even the same thing. One is a pressure regulator and one is a carburetor
My Mk10 has an AED, but it is very crude looking compared to this one
AED, nightmare for Jag owners, I restored mine years ago.
Yes they can be if they are not working right
@@LivingWithAClassic and nothing in BL cars working right, I experienced that I must change the mixture of that AED and also SU carburetors in each season. Now it is about 8 years that I stopped buying British classics because of those non stop problems.
I have a 74 jaguar xj6 4.2,
Where can I get a AED
Original SU AED is available from SNG Barratt in UK. Price £391 + VAT. Barratt's also do what they call an "uprated alternative" for £107 +VAT but currently out of stock.
@@maxallan4007around 1000 pound mark now