A video of my own XJR-6 Manual 95 model. Turned out to be the water pump was completely f*****d. So if you think yours sounds anything like it check the pump by removing the belt. Supercharger belt was disconnected prior, they can rattle too but not like this!!
XJR, Xj6, xjr6, xjr-6, engine, noise, rattle, X300, Jaguar