I've repaired my heat riser and got a new spring for it. When you apply heat to this spring, it contracts and curls tighter. When it does this, it unhooks itself from the peg in the manifold. It seems like what it ought to do is expand. The shaft moves freely but I can't get the spring to close the valve. I'm wondering if I have a wrong or defective spring. Should it expand or contract under heat? I got it from Classic Chevy Parts. For some reason, I've had a run of lousy or wrong parts from them. They even sent me a speaker that I didn't order and didn't pay for. They were mystified when I called to tell them about it.
