Heat riser stuck

I have 6 manifolds now that I have collected, ( all off different vehicles at different times ) they are all removed from late model slant engines, they are all welded identical to one another. Clean weld, factory.

I know this cause I have had to compare them since I am having issues with a manifold on one of my running vehicles and I thought about just replacing the moving parts.

I can get a picture if you would like.

I think RRR was talking about the weighted wheel instead of the vane.