1996 jag rattle in right front

Check cv joints. check wheel bearings.. Check wheel nuts are tight and are tightening up on the center part of the wheel

Check the fuse box in the trunk next to the battery.
let me know if you find it.

the belt problem could be a bad belt tensioner not putting enough pressure on belt.The rattle over speed bumps ect sounds like the front brake calipers

sounds like worn out shocks or struts

bearings don't rattle --they knock and the knock gets louder with rpm
it has a chain drive for the cam shaft and rattles are associated with a worn chain as there is no slack adjuster
The v8 engine (originally a 4 litre ) was only stroke by 10 mm to give it extra power
there was never any problem with the block from cracking as that engine was used in the Leyland truck and p38 car as well as range rover cars and off road vehicles
it's big draw card was the power to weight ratio being an aluminium cast block it was suited to fast car applications

This is going to sound silly, but remove your hub cap and then try it. Wouldn't be the first time I've seen that. Let me know.

on some jags they have the battery in the trunk compartment up on the right side

HI THERE I HAVE A JAGUAR XJ8 1998 AND I AM AWARE OF AN INERTIA SWITCH WHICH CUTS OFF THE FUEL SUPPLY TO THE ENGINE IN THE EVENT OF AN ACCIDENT OR BUMP I HAVE NEVER USED THIS MYSELF BUT IT IS IN THE DRIVERS FOOTWELL BEHIND THE FASCIA COVER ON THE RIGHT HAND SIDE.HOPE THIS HAS BEEN HELPFULL.

yes they are interchangible except the front spoiler is different, but everything else is the same. (the front lower spoiler on the 93 has built in fog lamps)
Pretty easy repair and I could only hope his car is the same color....

JPTCAT

yes - behind the gear shift, in between the two front seats - where the driver would place his/her right arm while he/she is driving. I beleive that is the only "glove box" that the car has. That is all that my 1995 jag XJ6 has anyway. :-)