I saw a Wheeler Dealers episode where they refurbed an S-Type, R-model with over 200K on the clock. Tech Elvis found the supercharger rotors had shed their teflon coating and the pieces had ingested themselves into the internals of the engine, yet caused no significant damage.
He stated that the oil in the supercharger oil should be changed out every 140K, and then had the rotors recoated with teflon and then re-installed with new oil.
I have a 2000 XJR and though I've had no issues other than an occasional check engine light and a "Restricted Performance" warning, I wonder if the same servicing schedule would apply to my engine. It has a little over 140K on it.
Any thoughts?
Also, were I to find the same condition of the S/C rotors on my engine, who and where would I get them recoated, domestically?
Thanks, Gary J.

 

Jaguar addressed the AJ16 Supercharger (Eaton M90) in the X300 but no advise on the AJV8 engines.

I would assume the same check for the M112?
Checking is important and changing fluids is always a good idea.

 

Up to you but it is so easy I would change it.
Now the big question for you is has the under SC cooling hose been changed?
That's the big job!

Yes the rotor coating does wear with time and age but it's not a big effect on the car. When my 2005 STR had 132K on it I replaced ALL cooling hoses. I swapped a low mileage (32K miles) blower in place of the factory 132K miles one. Yes I did notice a slight increase in performance. So the coating does help build boost. But I think you would be hard pressed to feel it?
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I think I saw somewhere a 60k (miles) interval quoted for the S/C oil, same as the diff oil. Can't remember where though.

 

Here's an old post link...note in Posts 35 & 36 DonB and I update the process for the fluid removal/replacement...

https://www.jaguarforums.com/forum/x...l-today-85828/

 

There are a few posts in that thread about removing 6oz and putting 8oz back. If the S/C is sealed and there is literally nowhere for the oil to go, aren't you overfilling it if you put more in than you take out? I'm about a month away from doing this on my XES and I had settled on removing what I could, and replacing it with the same amount. Can anyone verify (with sources) which method is correct?

EDIT never mind, I think we're talking very different superchargers