Torque Reaction Against Timing Drive Chain Caution
WARNING: This page is about a different car, the 2018 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
A wrench must be used on the hex of the camshaft when loosening or tightening in order to prevent component damage. Failure to prevent the torque reaction against the timing drive chain can lead to timing drive chain failure.