Land Rover Repair: Air suspension dropsy, airsprings, stop valve


Question
When you say I may need new "springs" what are you referring to, and , round numbers, what is that likely to cost.  I am weighing the tradeoff between trying to fix this or just going to straight coil springs, disabling the air suspension.

Thanks.
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-----Question-----
I have a Disco II with air suspension- my dash button corresponds with the "raise for offroad" option, rather than the "raise or lower at will" option.  In any event, with no consistent time interval, the vehicle frequently loses the pressure in the rear and squats when parked.  It comes back up when the car is on or driven, and sometimes stays level for several days.

A local mechanic has found no evidence of air bag leakage and has attempted to lubricate the stop valve that must be failing.

Any suggestions?  I'm told that replacing that stop valve is very expensive.
-----Answer-----
Odds are you have leaky springs.  They can leak at one point, but seal themselves up later, depending on load and exact level.  The rubber only lasts 4-5 years, so it's time for new springs first.

It is possible the valves are sticking, but not as likely.

Answer
The airsprings are $190 each, and can be installed by you in an afternoon.  

The main deciding factor between keeping or killing the air-suspension should be whether or not you like the function of it, properly maintained it will serve you well.  If you don't care if it's there or not a conversion might be better for you.