After researching online I have not found a definitive answer on the marks on the belt tensioner. The three lines and the space......im not sure does anyone know which mark indicates worn? The car has 111k on it so its very possible it is worn, the belt tensioner is running the s/c belt and my lack of performance could be suffering because of a worn belt tensioner correct? looks like prolly 50 bucks for a new tensioner.....any help is appreciated thank you.