Well I had the engine and box out easier than ever, it makes that process so much more pleasurable.
Since last weekend I have been stripping the engine down whenever I get a spare half hour.
I had a fussy head bolt to contend with which got me worried it had got very hot at some point.
Once I'd broken a few sockets on it, I managed to find the 5/8 impact socket I really needed and out it came.
No obvious head-gasket breaches or issues with pistons or the cylinder bores to my eyes.
Stretched timing chain.
Some fairly nasty looking valves and general lack of oil changes are apparent.
Upon removal of the camshaft I was greeted with some fairly severe lobe wear, along with its sorry looking corresponding lifter. This is the rearmost lobe and lifter.
I'm not sure if this is coincidence, but the head bolt that was stuck was the rear on the driver side bank, so it's the closest one to this lobe/lifter/pushrod.
I'm guessing this could have been poor bedding in of a camshaft?
Either way it can't have been running very well like this, so probably the reason it was removed from a Range Rover and sold to me.
Jim