Right now i am tearing apart my 66 Chevy Bel Air and when i pulled the exhaust manifold i saw that my "heat flapper thang" was stuck. Like to the point where huge vice grips and wd40 wouldnt even move it. Took the torch to it for a bit and got it out. I put it back together real quick and took it for a drive and felt like an idiot for not checking it sooner. Car ran alot better than when it was stuck in the fully closed position
