Andrew,

>From my experience with SLS, I believe that you've got leveling valve issues.

Here's my logic:

If changing the leveling valve settings causes the suspension height to change, 
the struts must be good.  If by some chance they were bad, it wouldn't raise at 
all, assuming the seals on the pistons were bad, which is the only part inside 
of them.

>From what you describe the inly possible variable is the leveling valve.

Rebuild/replace the leveling valve.

Dan



On Apr 19, 2014, at 2:35 PM, Andrew Strasfogel wrote:

> So I went to a dealership for a Club High Mileage event and had an array of
> seasoned techs work on my suspension problem.  :)
> 
> The consensus was that the bouncy rear end was NOT related to the air cells
> (spheres), since they are new.
> 
> We lowered the ride height by adjusting the rear valve linkage, from 16" to
> a litle over 14 as measured from the center of the rear wheel hub to the
> wheel arch.  Then we lowered the car to the floor and ran the engine while
> a couple burly techs sat on the deck with the tailgate raised. The level of
> the rear dropped down, but after 5 minutes there was no perceptible rise.
> We put it back on the lift and inspected the rear struts, which were German
> OEM and quite clean (e.g., not original to the car).  The springs measured
> 17mm in diameter, but the correct OEM springs are supposed to be only
> 15.95, so obviously these are replacement springs.  Could these incorrect
> springs be the source of my problem?  Or is there more likely to be a
> problem with the rear suspension valve?  SLS fluid is recirculating
> normally and there are no leaks in the system, but the failure of the rear
> end to rebound while under load may suggest a problem with the valve.
> 
> Thoughts anyone?
> 
> 
> On Sat, Apr 19, 2014 at 8:17 AM, Jim Cathey <j...@windwireless.net> wrote:
> 
>> i don't buy that about the bad spheres causing valve problems
>>> 
>> 
>> Pressure spikes.  Pretty nasty stuff.  Think hydroforming...
>> 
>> -- Jim
>> 
>> 
>> 
>> 
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