Video on how to install a tensioner, idler pulley and belt. This video is from a 1997 Chevrolet K1500 5.7 V8. These instructions pertain to many other models.
Tools:
Flex head 3/8 drive
Ratchet 3/8 drive
1/2" Socket deep or standard
3/8" Torque Wrench
Preferably a set of gloves.
Tensioner pulley is set at 27 FT LB
Idler Pully is set at 37 FT LB
Part numbers I used:
Tensioner: 88909593
Idler Pulley: 88909582
Belt: 88932794 or 6K960