Help required please! I'm a little confused as to how many belt idlers there are in my XJR6... Hopeless I know. If anyone can help I'd be grateful. If you know part numbers that would be even better.

 

The supercharger belt has 1 idler pulley, 1 tensioner pulley, then goes around the crank pulley, and the supercharger pulley itself. I think I have an extra idler and tensioner pulley around somewhere.

 

Hi Andy, I've recently changed the belts and pulleys on my XJR. I bought a kit of three belts & three pulleys from British parts.
On the supercharger belt there is one idler & one tensioner to replace.
On the aircron there is one tensioner.
I don't know if these part nos are Jaguar or British Parts, but for what it's worth:-
A/C tensioner is NBC5012AA
S/C tensioner is EBC11527
S/C idler is EBC11528
Belt sizes are
A/C 4PK1013
S/C 7PK1180
Alternator 5PK975
All the best.

 

excellent list of Jaguar part #s!