Here is the how to for replacing the air suspension compressor. I'm seeing more and more so hopefully this will help. I also provide a link to an Arnott compressor which I can say that they seem to be pretty good as I haven't have to warranty one yet.

Link: jaghelp.com: How to change the air suspension compressor on your Jaguar XJ

Happy wrenching.

 

good stuff. The pump arnott sells is the same as the jaguar one, (Wabco) so it should last as many years.

Other option, and not much more work (and much cheaper) is to rebuild the compressor.
Jaguar XJ6 XJ8 XJR X350 Wabco Air Suspension Compressor Pump Seal Repair Kit | eBay


I did Andy's kit a few months ago and it's worked like a charm. Fast fill and quieter.

 

Hi daxter,

Below are links to photos showing the air compressor piston ring seal replacement and air dryer desiccant replacement on our X350. The piston ring kit was about USD $50 and the molecular seive dessicant was about $50. If your air dryer uses silica gel it will be less expensive to replenish, but most owners don't even bother replacing the desiccant:

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Welcome to Jag-lovers - Members Photo Viewing Page
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Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page
Welcome to Jag-lovers - Members Photo Viewing Page


Other than the piston ring, there are very few things that can go wrong with the compressor aside from motor failure, piston rod bearing failure, or internal corrosion so severe that it cannot be repaired (all very rare so far). At this point in the life cycle of the X350, I would guess that 99% of air compressors just need a piston ring and a good cleaning, so money spent on a new compressor could be better spent on something else, like Arnott rebuilt Bilstein air spring/damper units!



Cheers,

Don

 

Why do you have to replace the relay?


Stu

 

due to the compressor running excessively due to air leaks, worn piston ring, etc.

You can always test the relay off the vehicle to rule out stuck contacts, etc - if it checks your good to go... No need to replace.

 

He's right that relay works excessively that's why Jaguar wants you to change it. I'm a very by the book kinda guy. You could also swap it for some relay that you don't use very much like, for example, a fog light relay. If your fog lights stop working then just replace that relay...

 

Thank you for your pictures

 

Arnott ask you to change the relay to give the compressor a warranty,

if you put a brand new compressor into a car with a stuck relay it will last approx 1 week!

so they demand you change the relay to make the waranty apply, a stuck relay will show with the compressor running excesively & even with the car turned off, if this ever happens change the relay ASAP

regards

Andy

 

I ordered Andys kit and thinking of trying removal myself as it seems straightforward - except for raising the car...
Is this something I can do in my driveway with the jack in the car? Or does it need to be done on a full lift?

 

Lift up front end and place on Jack stands.

 

ok. off to buy some jack stands...
thanks!

 

Hello
my2003 x350 xj8 is getting an new compressor with dryer as soon as I get the airfilter hoseplug near th piston to loosen .
i guess there is to much gunk in it .
Does anybody have an idea or a good trick how to release that plummerfitting?

 

Answered in your other post

 

I suggest that you post a picture and you may get some constructive answers.

 

I went on and opened the bore/piston part , took it apart and sprayed some wd 40 in it To no avail . I'll try again tomorrow

 

Oh that is nice
that plug from the airfilter to the the piston entry is not supposed to come of.
tinker tinker

Fitted 90 degree knee 10 mill then 10 mill hose

 

Fitted 90 degree 10 millim. knee then 10 polyamid hose, connection 10mill to 8 mill, a T in 8mill .
to the fuelfilter an 8 mill poly and to make the connection fuel hose 8mill inside diam.to the back after the dryer 8 mill hose poly and 8 mill 90 degree knee.
from the fuelfilter to the arrival soft rubberhose (10mill) from the original airfilter I used fuelhose 8 mill inside and a connector 8 mill to 10 mill

 

Nice work, that's great use of what's available.