Rear air struts deflate overnight - can't detect any leaks

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Rear air struts deflate overnight - can't detect any leaks

Postby grossgary on Sat Feb 25, 2017 8:40 am

I've spent like 10 hours or so now converting this car back to air struts.

Rear struts deflate overnight
Soapy water reveals no leaks, even if I take them off the car.

Top bushings are all new, surfaces cleaned, and greased.
Airline oring is new.
solenoid orings new I think but I'll check.

How can I find the leak?

1. I'm thinking maybe the solenoids are bleeding pressure back into the air lines - allowing air out of the strut but not external so soapy water doesn't show it.

I can't think of how to test this?

2. Is anyone familiar with the top mount bushings and how they seal the top of the air strut?
Where the strut rod comes through is sealed by the bushings and top mount. Seems like a terrible design.

I know these are prone to leak if you lift an XT6, I guess it torques it and puts an angle on it making the bushings not sit flat and seal.
Gary
89 XT6, rear LSD
02 OBW VDC H6
06 Tribeca
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Re: Rear air struts deflate overnight - can't detect any leaks

Postby grossgary on Wed Mar 01, 2017 12:52 pm

It was the rear bags leaking. They leak so slowly that soapy/water doesn't reveal it.

Drove into work today with full air suspension for the first time in too many years, glad to have it back!

Hopefully I'll recondition some struts, add the height control button and replace all the orings (even though I replaced most of them during all this work).
Gary
89 XT6, rear LSD
02 OBW VDC H6
06 Tribeca
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Re: Rear air struts deflate overnight - can't detect any leaks

Postby Myxalplyx on Sat Aug 04, 2018 9:03 am

Is your air suspension still holding out Gary?
Kevin Thomas
1989 2.7ltr XT6 AWD/Auto *WndCttr*
JC Sports Intake, Rallispec Header, Custom 2.5" exhaust with 2.5" Magnaflow muffler
Advanced Timing 32 degrees
ProECM Lightweight pulley
4.44 gears, LSD
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