Heat Riser.

OK guys, just rebuilt my '72 318. The passenger side exhaust manifold heat riser was trashed. Bought an NOS repair kit, thought that I understood from the directions how to install the stop bar and spring. The spring when heated seems to go in the wrong direction . I have tried all 4 positions that the spri g can be placed, all to no avail. Read a post on a /6 post and disagree with, The spring expands and the blade is open when cold, shut when hot. This makes absolutely no sense to me. The spring contracts when heated, and pulls away from the pin that is the shaft stop. Will try and send a picture. Well, as usual, photos will not load. I hate this, new S21 phone and a photo goes to 100% and then the error pops up, tried different lighting and same result. Damn