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P38A EAS again.

Discussion in 'Range Rover' started by tomcat59alan, Apr 22, 2021.

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  1. tomcat59alan

    tomcat59alan Well-Known Member

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    Morning, Everyone just running this past you all.The red Bastid decided to show me it's impression of a dog cocking its leg ,the passenger side front and rear have raised themselves. I raised the suspension to high, removed the leveling relay,measured the heights from the wheel centres to arches art night. Just checked and all the measurements are the same so no leaks. I personally think it's time to overhaul the valve block, it's been many years since I last did it.Someone posted a schematic for the system but I'm buggered if I can find it now.Thought I'd post this first incase I'm missing something obvious.Cheers Stay safe. Just found the schematic by @paul p38a. My thinking is dessecant preventing the valves from seating properly so air dryer time as well.
     
    Last edited: Apr 22, 2021
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  2. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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    Out of my effing mind.....
  3. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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  4. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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    Your kick panel connectors already cut and shut al'?
     
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  5. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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  6. tomcat59alan

    tomcat59alan Well-Known Member

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    That's the one thanks Mark,I can't see any common link between passenger side front and back so I'm guessing a rebuild, luckily I have a set of O rings in store's.;)
     
  7. brianp38dse

    brianp38dse Well-Known Member

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    Mines going to get a rebuild as it drops, but take the relay out and it stays there, it is quite a few years since it was rebuild so going to do the pump and block, i am going to end up have a completely rebuilt motor if things dont get back to normal soon:rolleyes:
     
  8. pwood999

    pwood999 Well-Known Member Full Member

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    Since the weather warmed up a bit, mine is rising at the rear again. If the passenger side valves are allowing air through, best to put these two on the L & R rear. That way if the rear rises when it's off & parked, it levels quickly when you start up in the morning.
     
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  9. oakey

    oakey Well-Known Member Full Member

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    Best thing to do is email Kurt and all doubts disappear
     
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  10. tomcat59alan

    tomcat59alan Well-Known Member

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    Yes,and thanks for the link anyway Mark.;):eek:
     
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  11. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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    Your welcome buddy.. ;)
     
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  12. tomcat59alan

    tomcat59alan Well-Known Member

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    Just found a spare valve block so I'll rebuild that ;):D
     
  13. RangeRoller dt

    RangeRoller dt Well-Sprung Member

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    Rebuild won’t hurt. I’d try swap the air outlet pipes on the valveblock around. If it cocks a different leg you should be able to deduce which is letting air back but that’s the long (and cheap :D) way
     
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  14. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    My suspicion is the rubber cones on the solenoid pistons rather than the o-rings but it cannot hurt.
     
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  15. pwood999

    pwood999 Well-Known Member Full Member

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    Definitely the plunger faces if random corners rise. The problem is rubber hardening over years & the slightly off centre base. Look at the dent on the plunger faces. If it rotates that’s when the seal is << 100% hence air passes. If block gallery is higher than the air bag then that corner rises.

    I tested this on bench with gallery both higher & lower than the corners & 4 gauges. It’s worse when the rubber is cold but the air flows (very slowly) when they differ.

    So it’s better if the car rises than drops because morning adjust is faster !!

    To reduce (but not fix) the problem you can sand the plunger face. Put it in a drill & spin. Then gently sand the spinning face to reduce the dent. WARNING if you press too hard the rubber will break !!

    I contacted Dunlop Air people and new replacement valves can be ordered at about £11 each (prob plus vat) but minimum order is 50.
     
    Last edited: Apr 22, 2021
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  16. kurtjohnson10

    kurtjohnson10 Well-Known Member

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    Drill the old rubber out and refill with potting compound mix - last for many years.
     
  17. pwood999

    pwood999 Well-Known Member Full Member

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    Interesting idea. Have you tried it and if so what potting compound?
     
  18. kurtjohnson10

    kurtjohnson10 Well-Known Member

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    electrical potting compound, the one that you use to cover circuit boards. Better than the original valves afterwards. One pack of potting compound will do about 40 valves ;)
    RS supply the compound mix o_O
     
  19. Mark Piercy

    Mark Piercy Well fumbled member.... Full Member

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    That could be a thread for the tech section?
     
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  20. kurtjohnson10

    kurtjohnson10 Well-Known Member

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    [​IMG]
     
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