choke heater assembly
Junior User
Joined: Apr 2017
Posts: 58
Likes: 0
From: Canton
Here's the assembly and where it mounts on the intake manifold. I won't be driving the vehicle in the winter (only 2wd), but we have cool enough temperatures otherwise I will need a functioning choke. I thought this assembly assists (along with the electric choke assist) in warming the coiled spring inside the choke assembly, opening it when the engine is warm. I'm not a mechanic so bear with me please.
Here's a pic of the aftermarket hot air tube I saw. By aftermarket I should have said replacement. This is a Dorman unit. I thought that if I could not get the manifold heat tube anymore that I'd just close off the intake manifold mounting plate and plumb the Dorman unit into my exhaust manifold.
Lead Driver
Joined: Nov 2013
Posts: 7,174
Likes: 1,174
What year and model do you have?
My '84 F250HD 351W (2 bbl) has the same choke heat tube in the intake manifold as in your picture. However, it had the full hot air arrangement, not the electric assist.
i ended converting to an aftermarket full electric choke, and deleting the hot air tube completely and blocking off the opening in the intake manifold. If you do this conversion, you will need to run a new ignition-switched 12v feed to the new full electric choke. With the stock electric assist choke, the power supply is tapped from the alternator stator and is only 7v, which won't be enough.
I'm curious about the Dorman choke heater tube you installed. Does it connect to a fitting on the exhaust manifold? That's kinda how it looks in the picture. If so, I'm surprised to see that and the opening in the intake manifold. I'd think it would be either/or, not both. Have some parts been swapped from another model?
My '84 F250HD 351W (2 bbl) has the same choke heat tube in the intake manifold as in your picture. However, it had the full hot air arrangement, not the electric assist.
i ended converting to an aftermarket full electric choke, and deleting the hot air tube completely and blocking off the opening in the intake manifold. If you do this conversion, you will need to run a new ignition-switched 12v feed to the new full electric choke. With the stock electric assist choke, the power supply is tapped from the alternator stator and is only 7v, which won't be enough.
I'm curious about the Dorman choke heater tube you installed. Does it connect to a fitting on the exhaust manifold? That's kinda how it looks in the picture. If so, I'm surprised to see that and the opening in the intake manifold. I'd think it would be either/or, not both. Have some parts been swapped from another model?
Junior User
Joined: Apr 2017
Posts: 58
Likes: 0
From: Canton
What year and model do you have?
My '84 F250HD 351W (2 bbl) has the same choke heat tube in the intake manifold as in your picture. However, it had the full hot air arrangement, not the electric assist.
i ended converting to an aftermarket full electric choke, and deleting the hot air tube completely and blocking off the opening in the intake manifold. If you do this conversion, you will need to run a new ignition-switched 12v feed to the new full electric choke. With the stock electric assist choke, the power supply is tapped from the alternator stator and is only 7v, which won't be enough.
I'm curious about the Dorman choke heater tube you installed. Does it connect to a fitting on the exhaust manifold? That's kinda how it looks in the picture. If so, I'm surprised to see that and the opening in the intake manifold. I'd think it would be either/or, not both. Have some parts been swapped from another model?
My '84 F250HD 351W (2 bbl) has the same choke heat tube in the intake manifold as in your picture. However, it had the full hot air arrangement, not the electric assist.
i ended converting to an aftermarket full electric choke, and deleting the hot air tube completely and blocking off the opening in the intake manifold. If you do this conversion, you will need to run a new ignition-switched 12v feed to the new full electric choke. With the stock electric assist choke, the power supply is tapped from the alternator stator and is only 7v, which won't be enough.
I'm curious about the Dorman choke heater tube you installed. Does it connect to a fitting on the exhaust manifold? That's kinda how it looks in the picture. If so, I'm surprised to see that and the opening in the intake manifold. I'd think it would be either/or, not both. Have some parts been swapped from another model?
This is a bit of a hybrid. 69 f100 with a 73-ish 400. I know I'm in the wrong forum but I found this thread most beneficial. I did not install the Dorman choke hot air tube, that was a pic I found...I believe from another thread somewhere on FTE. I want to run what I have now (or as close as possible) as I just want to get it running good. Other mods and body work will come later. Thanks.
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
However you can get warm air into the choke housing should work. The Ford electric choke is just an assist, not a electric choke. The electric assist warms up the inside of the choke housing when the temps are higher outside(I think someone said 60F) . It helps the choke pull off faster in warmer weather so you don't have to wait for the exhaust to get hot and heat up the tubing and then heat up the choke housing. In other words it's for when you really don't need the choke, so it helps it pull off faster.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Well, I've now seen one with a choke tube that goes through the crossover passage in the intake manifold. 
Glad to know about it.
As is being said, you can convert completely to electric, but you will have to get another choke heater as yours is an electric assist. But Holley and Edelbrock both make 12v heaters, so that shouldn't be a problem.
Or, you can probably repair what you have. I think you could use copper tubing and a bender to make the loop. Or, Dorman may sell a kit for it.
Glad to know about it.As is being said, you can convert completely to electric, but you will have to get another choke heater as yours is an electric assist. But Holley and Edelbrock both make 12v heaters, so that shouldn't be a problem.
Or, you can probably repair what you have. I think you could use copper tubing and a bender to make the loop. Or, Dorman may sell a kit for it.
FTE Legend
Joined: Nov 2015
Posts: 30,912
Likes: 4,123
From: Angier, NC
Crap had a post typed out and lost it!
In short what year intake are you using?
What other motors will that intake fit?
If that motor is used in a car check with venders that sell parts to restore the cars to see if they may have one.
Also if the year is known someone can look up the part number and who may have one. Also if the part number is known you can check ebay for that number.
BTW my 1970 AMC 360 uses that type choke heater on a Holley. The gasket kit had 2 different gaskets so must be 2 different heaters.
Dave ----
In short what year intake are you using?
What other motors will that intake fit?
If that motor is used in a car check with venders that sell parts to restore the cars to see if they may have one.
Also if the year is known someone can look up the part number and who may have one. Also if the part number is known you can check ebay for that number.
BTW my 1970 AMC 360 uses that type choke heater on a Holley. The gasket kit had 2 different gaskets so must be 2 different heaters.
Dave ----
Junior User
Joined: Apr 2017
Posts: 58
Likes: 0
From: Canton
I ended up scrounging one from a junk yard. They are getting hard to find in this neck of the woods. I tried fabricating one from the Dorman kit but couldn't get the tight bends required to connect to the carb without kinking and breaking the aluminum tubing.
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