Primary cam chain tensioners
 

Hi Damian,
just watched your latest video on the x100 cam chain tensioners which was very informative.
I have attached some photos of the original primary chain guides off my MY97 XK8, changed at 50k miles.
All the best.

https://cimg9.ibsrv.net/gimg/www.jag...7b974f475.jpeg
https://cimg0.ibsrv.net/gimg/www.jag...021c785e6.jpeg
https://cimg1.ibsrv.net/gimg/www.jag...990e1a829.jpeg
https://cimg2.ibsrv.net/gimg/www.jag...46988c1fb.jpeg
https://cimg6.ibsrv.net/gimg/www.jag...875787f88.jpeg

Your guides appear to be in way worse shape than his, despite iirc 30k miles less traveled. l wonder what causes this? Short trips/commutes vs long trips?

Time is as much an enemy as mileage.
I change my engine oil once a year in most of my cars even though I only put several hundred miles on them annually.
I have seven cars that the wife and I drive so many don't go very far.
The FARM TRUCKS only go to town every few weeks (3 miles away).

Jaguar offered included services when I worked at the dealer. (every 10k miles or once a year)
We were authorized to do the service once a year if the mileage did not reach the 10k level.