Whoa. PAG46? I could never find a requirement, so I used the most common PAG150. How can I figure out which oil is needed for my 96 XJS?

 

Do I have to take aircon out if it is just a loose hose nut ?

 

If you mean a loose nut holding the big return hose onto the evaporator pipe that pokes through the bulkhead, no. But you do need to replace the little O ring in that joint and then do up the nuts carefully and not too tight, just enough. It is this operation that must be done with a spanner on each nut, the one on the hose and the one of the evaporator fitting so there is no strain on the evaporator pipe.
The aircon unit's evaporator is a one piece effort with nuts and other fittings somehow fixed on the copper feed and return tubes of the evaporator matrix itself. It is these nuts you have to support while doing or undoing the hose and valve connections on the engine side of the bulkhead, or the tubes twist and fracture. If these tubes are fractured you have no choice but to remove the aicon unit to get at them.
This is the sort of thing it looks like (I an NOT saying this particular one is correct for your vehicle):
Jaguar XJ Series 3, XJS Air Conditioning Evaporator (AEU1191-A) - JustJagsUK.com=
There are much cheaper ones on ebay.com which say they fit, but whether they do or not I have no idea, but maybe if you know an aircon guy they can be made to fit/work with a bit of braising etc etc and a load of money saved. A second hand unit is Ok as long as you give it a thorough test that it will hold pressure for several days before you fit it.
Greg

 

Mine is written on the plate on the side of the compressor. Also, you can google PAG oil and several websites have lists of compressor brands/types and their oil requirements.
...Jimmy

 

http://www.aa1car.com/library/pagoil.htm Super good a/c reference chart here........http://www.johnsens.com/uploads/file...cantguide4.pdf

My 86 XJS w/ Harrison takes PAG 150 with its r134 conversion

My 97 XJ6L with Denso unit takes PAG46. I've put compressors and vac'd/ serviced both cars. I try to stick with the recommended PAG requirements.

 

It will be 5 to 6 weeks before I attempt the AC repair. I want to thank you for all the info and when I start the project I'm sure I will have more questions.
Thanks again

 

Sorry to restart an old thread, but the PAG150 oil I used when working on my AC system was used based off of this website:


Jaguar Refrigerant and oil capacity charts || TechChoice Parts


It was found on the internet, so I didn't consider that it could have been wrong.

 

here,s a handy chart I found

Jaguar Refrigerant and oil capacity charts || TechChoice Parts

 

But how much oil? The 2004-2007 X350 is supposed to have 6.1 oz of oil in the AC system. The compressor holds about 3 oz of oil, I hear. Does the rest of the oil evaporate under vacuum? Should you add 3 oz of oil if you vacuum down the AC and recharge it? What if you're just recharging it without flushing it out first?

I've got a used 2004 XJ8 with 100K miles that may never have had its refrigerant changed. The AC isn't the least bit cold. The refrigerant low port reads 0 PSIG (it's just at atmospheric pressure); the hi port reads 50 PSIG. I want to just blow in some more R134a without flushing it, but I suspect a lot of oil has leaked out.

Also, Jaguar manuals call for PAG 46, not PAG 150. Are they compatible?

 

you’re in the wrong forum. This one is for the XJS models. Way before your x350

 

Sorry. I don't know how I jumped forums.