223 376 assigned to the same assignee of this application which teaching is hereby incorporated by reference as this rotation occurs the stop face 104 of turret portion 108 is contacted by the upper end 131 of the backstop spring 42 and the backstop spring 42 is biased in a coil tightening clockwise direction sufficient torque must be applied to the backstop spring 42 to overcome the frictional force gripping pivot 21 permitting the backstop spring 42 to rotate on the pivot 21 this clockwise rotation direction is opposite the normal overruning or one way clutch direction as this rotation occurs stop face 102 of turret portion 107 contacts the end 133 of the assembly spring 44 biasing the assembly spring 44 in a coil loosening direction i e clockwise enabling spring 44 to freely overrun on the pivot 21 upon sufficient turns being taken to preload drive spring 40 relative to the pivot assembly 20 the assembly spring 44 upper end 133 is rotated further in the clockwise direction until it contacts stop face 101 assembly spring 44 lower end 134 rotates under stop face 102 in the arc between stop faces 101 and 103 the assembly spring 44 is biased in a tightening position such that the spring 44 helix grips the pivot 21 shaft preventing relative rotation of the tensioner 10 on the pivot 21 assembly of the tensioning device 10 is completed at this point it may be installed on the engine or packed and shipped for installation at another location such as in an assembly plant or.