I have an '04 XJR with 106k miles, and thinking it's time to replace the supercharger belt. Doing the research, it looks like Jaguar no longer makes the belt and requires you to upgrade to a double sided belt, along with new tensioner, idler pulley, etc. Has anyone found a belt that will replace the existing single sided belt? I can still see the the Jaguar part#, which is 2W93-8620-EA. Researching this site, I found a post that states a Gates K080520 fits the 4.2 engines. I found a different post that states a Gates K080525 fits. I don't find any cross references for the Jag part#. Which belt to buy? If I'm not getting any squeals or noise, should I change any of the related parts?

 

The owners manual calls for this belt replacement at 40K miles, you are way over. The original belt on my 06 XKR was double sided and required no changes for replacement so I am not familar with the problem. Just looking at it, as long as the belt is the right length, I dont see why a double sided belt would require a tensioner and idler change. These belts are transmitting a lot of HP ,they take a beating, if you dont want a surprise break, I would change it soon.

 

From what I've read online, I thought replacement was at 100k miles for the S/C belt, and 150k miles for the serpentine belt.

Researching the belt change online, this is what I found for the update:

07 XKR Service bulletin
The service bulletin number is JTB00045-3 and included six items that were replaced:
C2C37063 BELT - DRIVE
C2C37064 PULLEY - IDLER 98-02
C2C37055 BELT - DRIVE
C2C37056 BRACKET - IDLER MT
C2C37057 TENSIONER - DRIVE
C2S46862 PULLEY - IDLER

Being that my original belt is single sided, I figured the above list is what I needed. I'd prefer to just replace the belt with another single sided one. Any part numbers for the equivalent?

 

I think that was a TSB to reduce noise. It's otherwise not actually necessary as far as I know. You can still get suitable belts but sorry I don't know the number (I guess won't any more be a jag one).

 

Yes. If you take a look on the S-Type forum we have several threads with part numbers on this. You can get a Gatorback belt for the old grooved on one side belt but us guys with the double sided grooved belt it's pretty much just Jaguar.
Jaguar has a 100K mile on the SC belt. I changed mine at 60K on my 2005 STR.

A lot of guys (Ford, Gm) with blowers swear by the Gatorback belt.

Have you changed the SC oil? I would and again there are good threads with pictures on this in the S Type forum. It's a bit of a pain to change the oil.
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