Torque for water pump, pulley, tensioning roller and belt tensioner cylinders

Hello, I need help with my Volvo 850. I have the 126ps 2 liter engine, and would need the suit torques of: 1.Water pump 2.Reversing roller(V-belts) 3.Clamping roller(V-belts) 4.Gear tensioner(V-belts) Many thanks in advance