1972 Corvette Choke question - L48 Automatic

[Christopher R.]

Quick question to the forum... I have a 1972 Corvette Base Coupe. The choke spring assembly that mounts to the intake manifold - even though there is one philips head screw that holds it to the manifold, it appears to leak exhaust against the card side of the manifold as i can see carbon. Is there a gasket to use under that small aluminum casing - or something to seal it? Don't see anything in the assembly manifold and it has that tiny hole that the spring casing sets inside. Any ideas?

[Patrick H.]

Re: 1972 Corvette Choke question - L48 Automatic

Quick question to the forum... I have a 1972 Corvette Base Coupe. The choke spring assembly that mounts to the intake manifold - even though there is one philips head screw that holds it to the manifold, it appears to leak exhaust against the card side of the manifold as i can see carbon. Is there a gasket to use under that small aluminum casing - or something to seal it? Don't see anything in the assembly manifold and it has that tiny hole that the spring casing sets inside. Any ideas?

I'm not sure what the "card side" of a manifold would be, but...

The exhaust heat crossover lives under here, and on virtually every engine the paint will burn off this area. There is no gasket under the choke spring, and no holes go all the way down to the exhaust crossover - at least not from the factory. No guarantee on what "Bubba" might have done to your car.

Can you post a picture?

[Joe L.]

Re: 1972 Corvette Choke question - L48 Automatic

Quick question to the forum... I have a 1972 Corvette Base Coupe. The choke spring assembly that mounts to the intake manifold - even though there is one philips head screw that holds it to the manifold, it appears to leak exhaust against the card side of the manifold as i can see carbon. Is there a gasket to use under that small aluminum casing - or something to seal it? Don't see anything in the assembly manifold and it has that tiny hole that the spring casing sets inside. Any ideas?

christopher------


As Patrick says, there is no way that there can be any exhaust gas leak at the choke stove as long as nothing has been tampered with/modified. The manifold-mounted choke assembly for your application consists of a choke stove with integral choke thermostat. It is mounted to a "flat" on the manifold with a single screw. There is nothing underneath the choke stove but the flat on the manifold. No gasket, no seal, nothing.

[Mark E.]

Re: 1972 Corvette Choke question - L48 Automatic

I'm guessing "carb side".

Are you seeing carbon? Or burnt/peeling paint? No sources for carbon around the choke stove unless a hole to the crossover passage was somehow developed (never saw this) or created. There is a blind locator hole and a blind tapped hole for the screw.

[Christopher R.]

Re: 1972 Corvette Choke question - L48 Automatic

ok thanks for the information. I sent the carb out to have the throttle shafts done by Cliff's performance in Ohio. I will check to make sure that hole has not been tapped through. Although by looking at the choke spring assembly, it definitely looks to be the case. If "bubba" over the life of the car before I got it and he did make a hole there, what can i do to fill it?

[Joe L.]

Re: 1972 Corvette Choke question - L48 Automatic

ok thanks for the information. I sent the carb out to have the throttle shafts done by Cliff's performance in Ohio. I will check to make sure that hole has not been tapped through. Although by looking at the choke spring assembly, it definitely looks to be the case. If "bubba" over the life of the car before I got it and he did make a hole there, what can i do to fill it?

christopher--------


Assuming the screw hole was drilled/tapped through, the screw, itself, should seal it well enough to prevent any significant exhaust gas escape. However, I cannot see any reason, at all, for anyone to have drilled it through, even "bubba".
c