smoke middle of manifold

[GoldDduster]

I removed my electric choke to sand it down put it back now i have smoke coming out right in the middle where the choke is could is be a cracked manifold or gasket loose manifold bolts any ideas?

 

[Professor Fate]

A picture of what parts you have would be nice.
Lacking that, if this is what you have

it is an electrically ASSISTED thermostatic choke.
Which means it still works off of exhaust gas temperature and fits into an opening in the exhaust manifold.
Between the choke and manifold should be a bathtub-shaped insert in the manifold similar to this:

Which requires a gasket between it and the manifold.
Sounds to me like the gasket is missing/bad.

If this is not what you have, then I don't know what it is without seeing it.

 

[GoldDduster]

i should of put it's a 74 the first photo that's choke i got

 

[GoldDduster]

also i think 73 74 don't have those seals

 

[Professor Fate]

A picture would show us what you do have.

 

[GoldDduster]

i'll work on it

 

[slantsixdan]

A picture of what parts you have would be nice.
Lacking that, if this is what you have
View attachment 1716477019
it is an electrically ASSISTED thermostatic choke.
Which means it still works off of exhaust gas temperature and fits into an opening in the exhaust manifold.
Between the choke and manifold should be a bathtub-shaped insert in the manifold similar to this:
View attachment 1716477020
Which requires a gasket between it and the manifold.

That choke thermostat you show there is a '73-up electric-assist unit, yes. But that stamped-metal "bathtub" and gasket arrangement was only for the '70-'72 exhaust manifolds, which have an open hole at the top of the № 5 runner. The gasket and bathtub seal off the hole (until they don't), and then a particular, non-electrically-assisted choke thermostat sits on top.

The '60-'69 and '73-up exhaust manifolds have a closed, integrally-cast well for the choke thermostat to sit in. The early and late wells are shaped differently.

The Slant-6 '70-'72 choke cup ("bathtub") and gasket are extinct, and not the same as the V8 parts. So if you're running a '70-'72 exhaust manifold, remove whatever remains of the factory setup, cut and drill a new gasket out of appropriate high-temperature gasket material, cut and drill a flat blockoff plate, and perch a new electric choke kit on it. A № 1231 if you're running a pre-'74 1-barrel carburetor (Holley 1920, or any-year Carter BBS), a № 1234 if you're running a '74-up 1-barrel carburetor (Holley 1945), or a № 1232 if you're running a "Super Six" 2bbl setup (Carter BBD or Holley 2280).

 

[TylerW]

The only problem with those electric choke kits is tapping switched power for it if the car is older than a '73. No big deal in doing it but if it ever shorts out for any reason, the wiring harness begins to look like one of those cartoons with the absurdly long burning fuse.

BTW Holley did make a non-electric assist '74-up choke. I have one on my Plymouth since someone helpfully swapped a later manifold onto the original '72 engine. It's probably a truck application for that choke.

 

[GoldDduster]

i don't get anymore smoke it was just a freak thing

 

[rich7016]

i don't get anymore smoke it was just a freak thing

I have a '70 Valiant with the open-style exhaust manifold. It was always leaking exhaust from there despite trying several gaskets , sealer , etc. I finally put a later exhaust manifold on the car that has the closed choke well , problem solved.