WARNING: This page is about a different car, the 2013 Land Rover LR4, 2012 Land Rover LR4, 2011 Land Rover LR4, and 2010 Land Rover LR4. 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.