Alright guys don't flame me, i am helping a friend replace their serpentine belt on their 2003 Ford Explorer V8. I need to know where the tensioner pulley is, the diagram under the hood just shows the belt layout and doesn't identify which is the tensioner pulley. Also what is required because i have read 2 things on this forum, that all you need is a 1/2" breaker bar and there is a square hole for it to fit into, or that you need a 13mm socket, which is it? Thank you for your help, a pic or diagram would be great.