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Thread: EAS tank not holding pressure.

  1. #1
    Join Date
    Oct 2007
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    EAS tank not holding pressure.

    Hi all, I've done a fair bit of work on my EAS over time (as we all have), most recently 3 new air bags, the fourth is only about 12 months old.
    The compressor and valve block have been rebuilt about 12 months or so ago.
    The car has been dropping over a few hours, the new air bags have improved that greatly.
    My problem is the air tank seems to be losing pressure while parked.
    I have checked and rechecked all hose connections, valve block, read and cleard any fault codes, can not find any leaks.
    So my question is, if the tank is losing pressure, could it be the non return valves letting the pressure escape?
    Or something else maybe? Any suggestions welcome.
    I just want to investigate any possibilites before I take anything apart.
    Cheers, Pete.

  2. #2
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    Carnegie
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    If the NRV's are leaking, to symptom is usually the front end or the rear end dropping uniformly - that's been my experience.


    You've got to have a leak somewhere. Can you get your hands on an ultrasonic leak detector?

  3. #3
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    Thanks David, yes I agree it must be a leak somewhere...no I don't have acces to a leak detector, that would make life easier!
    I had a friend with a Disco 2, the rear end just dropped one day while driving, sounds like what you describe with the nrv symptoms.
    I'm wondering if the air hose from the tank on mine has developed a leak somewhere, I might try and get under with low tech soapy water and see if I can find anything.

  4. #4
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    Jan 2011
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    worth a second to check the drain bolt on the tank is tight to, hopefully it's something simple.

    Good luck

  5. #5
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    Have you tried leaving it at standard height, to see how it settles with the EAS timer delay relay disengaged. That could help diagnose whether the leak is one sided or NRV related. Pretty rare to hear of the tank leaking.

  6. #6
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    I found a crack in the plastic body of one of my solenoids that was letting out just enough pressure to let it gently down, quick visual check but worth it to rule it out.

  7. #7
    Join Date
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    I got under and sprayed soapy water on the air tank drain bolt, alas, no leak.
    I'll disable the eas tonight and see what happens...would love to get this sorted!

  8. #8
    Join Date
    Oct 2007
    Location
    Williamstown, Victoria
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    I have an update, I changed the eas relay under the passenger seat to a yellow one as described in another post, effectively disabling the eas while the vehicle is not running.
    Since doing that, it has stayed up perfectly overnight at all four corners, which has been excellent.
    I started it up this morning and found the tank must still be draining, it took exaclty 10 mins for the compressor to shut off with a door open.
    So it appears the tank is completley draining overnight and I seem to have ruled out leaks in the airsprings or lines.
    So, eas gurus, what should me next step be here?
    Do I need to take the valve block out and inspect it?
    If so, what should I be looking at here, any particular areas or valves I should be checking as the most likely culprit?
    Any help here will be most appreciated!
    Thanks, Pete.

  9. #9
    Join Date
    Jul 2014
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    Pete have you checked for leaks with the air dryer?
    2000 4.6 HSE Alveston red
    2007 307 xse peugeot
    1974 xj6l jaguar

  10. #10
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    Yep, sprayed soapy water on the top and bottom connections of the air dryer, did not see any bubbles forming.

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