WARNING: This page is about a different car, the 2015 Jaguar XK, 2014 Jaguar XK, 2013 Jaguar XK, and 2012 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
To install, reverse the removal procedure.
NOTE:
Tighten the bolts in the indicated sequence.
Fig 1: Right Valve Cover Bolts Tightening Sequence