Ash84 Posted July 24, 2023 Report Share Posted July 24, 2023 Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 24, 2023 Report Share Posted July 24, 2023 Heater duct and head bolt, or are you asking about the thing behind the circled head bolt? If so, Sisson choke. Quote Link to comment Share on other sites More sharing options...
Ash84 Posted July 24, 2023 Author Report Share Posted July 24, 2023 Need help knowing name of part in first picture so I need can replace it and the second picture I need to know name and operation of it this is a 1950 plymouth coupe Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 24, 2023 Report Share Posted July 24, 2023 https://www.moparmall.com/Plymouth-Dodge-DeSoto-Chrysler-Heater-Duct-p/nb-78134.htm Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 24, 2023 Report Share Posted July 24, 2023 (edited) The second picture is a sisson choke mechanism. It's an automatic choke, you are missing the linkage that goes to the carb choke butterfly. In the first picture you can see where someone hamboned in a manual choke setup. Edited July 24, 2023 by Sniper 1 Quote Link to comment Share on other sites More sharing options...
Ash84 Posted July 24, 2023 Author Report Share Posted July 24, 2023 OK thank you that helps alot. About not being clear on description, it's been awhile since I been on here didn't really know how to put my issue in . It would only allow me to post the pictures Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted July 24, 2023 Report Share Posted July 24, 2023 the sisson choke that you have is the model that fots 1949- 52 plymouth cars. This is the most expensive sisson choke because of the years it fits. The other sisson choke goes from 1937-52 but the arm is on the other side and this choke is mounted behind the carb and yours is mounted in front of the carb. You can not reverse the arms on the early version to fit the later Plymouth version. The later version Ply sisson choke if it is NOS will cost around $300 if you find one that is completely brand new. I have alot of factory information on these sisson chokes and how to set them up on your car. Rich hartung desoto1939@aol.com Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 24, 2023 Report Share Posted July 24, 2023 Of course the question is why is the Sisson disconnected? Is it bad? Wrong carb? Where is the linkage that is missing? Here's a picture of the setup on my 51 Cambridge Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted July 25, 2023 Report Share Posted July 25, 2023 Sniper: Most old car owners did not know how to adjust the sisson chokes and or even know how they worked. Same issue that we have with our modern cars. Most current car owners do not do any maintenance or repairs on their own cars becasue they do not have the skill sets and or tools. So alot of owners added ina manual choke that they could control from their drivers seat when the weather was cold and they never reattached the connection rods. Now that some of us are mechanically inclined we now tackle the job and get literature and can also get on forums like the P15-D25 and ask questions and hopefully someone might provide some answers to get us working again. These cars are very simple as compared to our modern cars, but i still see a lot of car owners that do not know anything about their car and take it to a mechanic to get it fixed. The hobby is changing. The early collector did all of the work, engine rebuild, painting, interior, etc. Now we ship the car off for someone else to do the work. But when they breakdown on the road they have no idea how anything works, so call the big hook and have it towed to the mechanic. Just my 50 cents worth of input. I do have lots of experience and literature on these Sisson Choke and also the Sisson testing stand and adjustment tools. Rich Hartung Quote Link to comment Share on other sites More sharing options...
P15-D24 Posted July 25, 2023 Report Share Posted July 25, 2023 Downloads section has quite a bit of info on the chokes also. Quote Link to comment Share on other sites More sharing options...
Ash84 Posted July 25, 2023 Author Report Share Posted July 25, 2023 I will look in the automatic choke, also where did you the heater duct mine definitely needs replaced and its made out of some type of fiber it's just falling apart. im not a type of guy that can do it all but I will try. This car needs every this either replaced or taken apart and cleaned so I'm sure I'll have more qutions in the future. Quote Link to comment Share on other sites More sharing options...
Doug&Deb Posted July 25, 2023 Report Share Posted July 25, 2023 Keep asking questions. There is a lot of knowledge here. Quote Link to comment Share on other sites More sharing options...
Dan Hiebert Posted July 25, 2023 Report Share Posted July 25, 2023 For what it's worth - Unless you're bent on originality, there is nothing "wrong" with an aftermarket manual choke on these cars. I've had one on our D24 for thirty years with no issues, but the more I look at it now, the more I want to put the Sisson choke back in operation. My installation of the manual one isn't quite of "hambone" (I like that descriptor) quality, but it's not far off. I had replaced the Sisson choke way back when because it was not working right, but I'll be the first to admit I knew absolutely nothing about it - other than it wasn't working. Now I know why it wasn't working and how to fix it, thanks to this Forum. Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 25, 2023 Report Share Posted July 25, 2023 2 hours ago, Ash84 said: where did you the heater duct I already posted a link to that. Re-asking already answered questions is likely to get, at least with me, you ignored. Quote Link to comment Share on other sites More sharing options...
Ash84 Posted July 25, 2023 Author Report Share Posted July 25, 2023 OK thank sorry I missed that link. Much appreciated. Quote Link to comment Share on other sites More sharing options...
Sniper Posted July 25, 2023 Report Share Posted July 25, 2023 A working Sisson choke is no great mystery and neither is adjusting it. You don't need special tools or a ton of literature. It is a very simple thing to do. http://www.yourolddad.com/choke Quote Link to comment Share on other sites More sharing options...
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