July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Cylinder Head Distortion
WARNING: This page is about a different car, the 2012 Land Rover Range Rover Sport and 2011 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.
Measure the cylinder block/cylinder head distortion.
Using the special tool, measure the mating face distortion.
If the value is not to specification rework the mating face.