I'm replacing my auto tensioner in my 01 4.7 Durango. The tensioner and idler pulley come with it and it doesn't come with any bolts to hold it to the engine. Can anyone tell me what holds it in place? It looks like a torx head in the middle of it but its too tight under the hood to see so I was hoping someone who has replaced it already could tell me if its a torx and if so what size. Thanks guys.