Sisson choke rod goes..?

[Dan Hiebert]

...to which hole in the choke lever, the outer (drivers side) or inner (passenger side).  I know the fast idle rod goes in whichever one the Sisson rod does not.  None of the materials I have show where the rods go, none of the threads I found on the automatic choke topic have a clear view.  I took this apart and installed a manual choke a tad over 30 years ago, so I have zippo recollection. 

 

Other than the fast idle not being functional, I'm not having any issues with the manual choke.  I had installed it because the automatic choke was not working.  I've since ascertained why it wasn't working (thanks to this Forum), but since I wasn't having any issues, I left it alone.  I recently rebuilt the carburetor and decided that since I have all the associated stuff disassembled to tidy up, that it would be keen to put the original choke back in the car.  I don't know if it will work or not, the bimetal arm is a bit rusty and I don't know if that will change its reaction to heat. 

[Sniper]

Here's a link to how mine is set up, but there are two types of Sissons, one mounted ahead of the carb, one to the rear of the carb.

 

[DonaldSmith]

Inner rod from throttle fast idle cam. 
Outer rod from Sisso choke.
 

[Doug&Deb]

Dan make sure to make a gasket for under the choke assembly. High temperature gasket material works. The original gasket was asbestos which is a no no.

[lepic56]

Hi Doug

so that gasket is very important??

mine is missing,  the choke works good  , but not 100%,  like it should be,, it is hard to adjust..

Thank you for the information, as I can see, they are simple to work on, but every little parts needs to be there. 

[Sniper]

I believe that gasket helps regulate the heat transfer to the bimetallic coil inside the choke housing.

[Dan Hiebert]

I have a copy of the Auto-Lite training material for Sisson chokes.  I think I got it from here.  I've read in several places that the choke won't work right without that gasket, but the way that document reads, it was added to keep rust from the manifold and other contaminates out of the mechanism, which isn't a precision instrument by any means, but does need to be clean to work right.  No mention of proper heat transfer, etc.  I've been laboring under the assumption it was for appropriate heat transfer, too.  Since it sits on the exhaust manifold, that gasket has to be heat tolerant.  Regardless, no one around these parts has high temp gasket material (exhaust or otherwise) in stock, so I'm waiting for NAPA to get some that they ordered for me.  That gasket is all I'm missing to complete the project.

[Doug&Deb]

Dan I ruined the choke on my D24 years ago because of not having the gasket. After replacing the choke and using a gasket I had no issues. I think it’s necessary for proper heat transfer for sure.

[Dan Hiebert]

Oh, I don't doubt it.  Here's the training document I was referencing.  The way it was written, it seems these chokes were initially installed without the gasket when they first made the scene, then based on problems reported from the field, the gasket was added - note the date of the document is 1938.  I certainly don't intend to omit it as I suspect that not having it is one of the reasons why my choke wasn't working way back when.

Autolite Sisson Choke Training.pdf

Edited January 22 by Dan Hiebert

[desoto1939]

Hey Dan:  The Autolite Sisson choke training info was from me and i added it to the down load section. Also sent you the Sisson Choke manual and the rod length information.  You can purchase the Sisson choke gaskets on ebay but you can make your own with any heat gasket material.

 

Yes, you do need the gasket because of the heat transfer from the manifold to the bi-metal plate that is under the base of the choke.

 

Rich Hartung

 

[Dodgeb4ya]

Colder parts of the country used two  stapled together asbestos choke base gaskets to promote longer choke plate opening.

Standard moderate climate areas was one gasket.

[desoto1939]

4 hours ago, Dodgeb4ya said:

Colder parts of the country used two  stapled together asbestos choke base gaskets to promote longer choke plate opening.

Standard moderate climate areas was one gasket.

Dodgeb4ya: Never would have thought about that option to keep the choke plate open longer. Good point for my Sisson Choke power Point information.

 

Thanks,

 

Rich Hartung