The heat valve is stuck in my 235 ( I have had no luck getting it free) , and though the engine seems to run fine, was wondering if it was stuck in the open or closed position. It appears from your video that if the weight is horizontal, the valve is in the heat on or closed position. I guess that is where mine is. For some reason, I do not have the problem that brokenhead had with his valve wedged closed. Thanks for the post.
Lee


1956 Chevy 3200, 235 w/3 speed