TENSIONER, Engine Timing: Description: Description
WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
The timing belt tensioner (1) is mounted to the cylinder head. It has a spring loaded offset hub and a tension indicator (2). Rotating the tensioner hub counterclockwise against internal spring pressure applies tension to the timing belt. When the silver tab is centered in the window the timing belt tension is correct. Lock the tensioner in this position by tightening the nut (3).
NOTE:
If the silver tab is to the right side of the window, timing belt tension is insufficient. If the silver tab is left of the window, timing belt tension is excessive.