Is My Heat Riser Passage Open or Closed ?

[Gripper]

My goal is to lower the temperature around the carburetor.
69 Super Bee with stock 383 running Eddy 650 AVS2 until Dave can repair my Carter 4615.
Is there any way to tell if the previous owner / engine builder blocked the intake heat riser passage ? without removing the intake ?
I have no history on engine rebuild / repairs from previous owners.

Thanks Gripper

 

[pnora]

Not really unless you have an intake with the removable choke well.

 

[DynaBro]

Does the knob twist? If it moves it likely functions. Or even exist? The previous rebuilder completely blocked mine and it's missing, which was a telltale sign.

 

[toolmanmike]

My goal is to lower the temperature around the carburetor.
69 Super Bee with stock 383 running Eddy 650 AVS2 until Dave can repair my Carter 4615.
Is there any way to tell if the previous owner / engine builder blocked the intake heat riser passage ? without removing the intake ?
I have no history on engine rebuild / repairs from previous owners.

Thanks Gripper

If it's blocked off or plugged with carbon, you won't get exhaust heat up to the carb so that's a moot point. Does your heat riser on the exhaust manifold work is more valad. Stuck open is good. Stuck partially or fully closed is another.

 

[Gripper]

Heat riser has been removed.

 

[toolmanmike]

Heat riser has been removed.

You will still get some exhaust through the intake but not much. The best way is to make sure the passage is blocked at the intake gaskets. Sheet stainless steel works well.

 

[Some Car Guy]

You might try a temp gun and see if the area heats up as the car warms. Other than that, it’s pull the intake time.

 

[71Beeper]

If the engine paint is burned off on the intake on either side of the carburetor chances are the passage is still open.
I pack the passage full of tin foil (really compact it in there) it will last a few years or more.

 

[R413]

Is the engine running? Then YES! Drive it around and then see how hot the crossover passage is. Don't burn your hand. It should be so hot you can't hold your fingers on it. If blocked it won't be any warmer than the rest of the intake.

The paint of good quality won't burn off.

 

[Gripper]

Thanks to everyone for the information.
I will check this weekend and report findings.

Thanks Gripper