77 400 Heat Riser
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Joined: Feb 2007
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77 400 Heat Riser
Hi,
I have a 77 F250 with a 400. I took my carb off to get it rebuilt and found the heat riser from the manifold to the choke was broken. I need to replace it but can't seem to find one listed anywhere.
I pulled the plate off of the manifold and found a coil of tubing underneath with 2 openings. One obviously is the broken line going to the carb. The other appears to pull air from the atmosphere. Is this true? Can I just make a new coil of tubing and run it to the carb? I would just buy a new one, but can't seem to find a part number or an actual description of this specific piece.
Thanks
Bill
I have a 77 F250 with a 400. I took my carb off to get it rebuilt and found the heat riser from the manifold to the choke was broken. I need to replace it but can't seem to find one listed anywhere.
I pulled the plate off of the manifold and found a coil of tubing underneath with 2 openings. One obviously is the broken line going to the carb. The other appears to pull air from the atmosphere. Is this true? Can I just make a new coil of tubing and run it to the carb? I would just buy a new one, but can't seem to find a part number or an actual description of this specific piece.
Thanks
Bill
Senior User
Joined: Apr 2004
Posts: 235
Likes: 1
From: Fayetteville, NC
Both ends of the coiled tube should stick out the top of the plate. One end should connect to a nipple on the top of the carb that is inside the filtered part. That is where it draws air from, the other end attaches to the choke housing. The coil itself is exposed to exhaust so it needs to withstand the high temps, and the end going to the choke does as well. A piece of steel brake line should work for the coil. If you have to connect the coil to the choke with rubber instead of the stock nut and flare, then you should use a silicone hose that can handle the heat.
I personally welded the holes shut on mine since they had rusted away, and installed an electric choke off a one barrel carb that used to be on my old 83 ford ranger. It got wired to the STA terminal on the back of the alternator just like it was stock on the ranger.
I believe I've heard it called the choke stove, or the choke heater before if that helps you search.
I personally welded the holes shut on mine since they had rusted away, and installed an electric choke off a one barrel carb that used to be on my old 83 ford ranger. It got wired to the STA terminal on the back of the alternator just like it was stock on the ranger.
I believe I've heard it called the choke stove, or the choke heater before if that helps you search.
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