WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not use a caustic cleaning solution or damage to connecting rods may occur.
Mark and separate the parts and clean with solvent. Clean the oil passages.