Frozen Manifold Heat Control Valve

pishta said

Now you can return the $13 can of Gearhead Cologne. Vinegar, the other acid! The anti rattle spring is just to keep it from bouncing around, very light weight. should have a type of cloth bumper wrap where the riser weight hits bottom so it doesnt make a noise too.

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The spring is bimetal. It is tight when cold and gradually loosens up as the engine warms. When the engine is fully warm, the valve is partially open and opens fully when any throttle is given. Here is operation when the spring is cold. I will be glad to shoot another video while hot if you want and you will clearly see the difference.