Does anybody know if I Can air up the suspension on a 2005 XJ8VP from an air hose?
Thanks for your help

whats the suspensions problems/symptoms, appart from too low i guess?

it would not be an easy thing to do, if you were to attempt it you would need to feed air directly into the airbladders, not from the compressor as it has to go through valves which you cannot control, also getting the corners to the correct heights level would be pretty tricky. let us know whats wrong with the suspension it may be an easier thing to tackle.

regards

Andy

the answer would be no! You have relays,you have modules that communicate with sensors on the 2004-2005 x350(self leveling) that is all interrelated with the suspension.

The answer is yes. When I was troubleshooting my XJ8 I put a Gauge and Schrader valve directly into the storage tank. You can also directly jump the solenoid block if you know what you are doing.

Not easy but possible.

Every time I read one of these threads it reinforces my decision to change to coilovers.

just never seen anyone EVER override or jimmy-rig the suspension on a jaguar without damaging the system.If someone has done this please explain this set-up to me please.I would like to learn this and understand it completely since I have had several people that come to me with there cars with suspension related issues...and I want to inform them how to do such a operation. ...

I drilled and tapped a hole into the tank.

I used the wiring schematic to activate whatever solenoid I needed to raise or lower each spring. If you know what you are doing and are careful, you will not damage anything. Just don't leave the solenoids powered too long.

I wouldn't call it "jimmy rigging."

...but rigged, nevertheess, especially when drilling and solenoid overriding is involved. Let's not sugarcote it.

Sugar coat what? He asked if it was possible. I was troubleshooting the system. Call it what you want. I couldn't care less. If you don't like it, don't do it.

The phrase you want is sugar COAT.

lol, ok guys I see where this is going,so lets not get into a shouting match over technique,or approach to a issue.My position has always been not to advise anyone to use any approach that requires you to deface,or possibly demage the components of the car when troubleshooting.It may work for some,and for others may cause much trepidation of uncertainty.Just wouldnt advise it,but if someone on the forum has done it,then ok...As all techniques are special,I would have to say based on what Jag XJ8 Red has stated," Just don't leave the solenoids powered too long." a person would have to know when to hold them and when to fold them, and some understanding as to when to just walk away before you really mess something up...agreed? At the end of the day, I would like to know if any technique used will resolve the issue or still leave the problem unsolved?This is why I said jimmy-rigg because it would be just be that, and not a real fix.Now before the testosterone starts flying here again ,we all are here to learn,to share, to engage,and nothing more.So I hope by whatever I leave in the forum has been a help ,or motivate to another owner.Nothing personal here,and please fellas can we just take it down a notch lol....I dont take it personal really and no one here should either...Until next time Happy Wrenching guys.....

I am totally on side with Matt (H20 boy). The tank wall thickness is just not thick enough to be messing around with trying to drill and tap well enough to support a Schroeder valve and gauge being installed. If the gentleman was successful when doing to his, well we will just have to put that down to blind luck. I definately would not recommend trying to duplicate his effort.

Okay, how thick do you think the tank wall is? Luck has nothing to do with it. It is already drilled and tapped once.
Boldly going where others fear to tread.

What I come back to on this one, is why would you want to use an air line to charge the reservoir, when there is a perfectly good compressor installed on the car. (OK they don't last long enough, and I should know, as mine failed at 35k miles)

Before I ripped it out, I was considering installing an aftermarket compressor in the trunk along with an aftermarket controller.

Abandoned the whole mess for coilovers and never regretted it. As I said, the mods were with that change in mind.

I have since made a 12V compressor out of the compressor and storage tank.

Thanks for sharing. I like your approach to test things before replacing.

Does anyone know how many psi/bar in the tank in normal working condition?

The bags operate in the 150 range. The compressor shuts off at 15 Bar (218).
Pressure relief at 17 Bar (254) but the tank is only rated to 16 Bar.

Nice to see someone else not afraid to break an egg.