[SOLVED] Auto Leveling Suspension Sag - Sticky please? - Page 2 - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #11 of 11 Old 09-08-2016, 06:21 PM
Join Date: Mar 2014
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cramblda is on a distinguished road
Which O-Ring

I took the factory o-ring to Seal Source (an O-Ring and Seal specialty shop) in Portland, OR. They couldn't match the factory o-ring exactly, but they gave me their closest match which had a slightly smaller inside diameter and was just slightly thicker in the cross section.

They said the o-ring size was 4 x 8 mm. ( I think it's a 4mm ID, 8mm OD, and 2mm Cross Section )

I replaced all four o-rings. One at each shock, and the two on the air pump. The two in the shocks were pretty hard to get the white tube back in the fitting, I assume due to the tighter inside diameter/cross section. When I pushed the fitting into the shock, I could feel the o-ring springing the fitting back out a bit. I did use some of the TFE paste on the white tube that inserts into the fitting / o-ring. I tried both with and without TFE, didn't make the fit any easier without, so I decided to stick with a little TFE paste for extra seal. I eventually was able to get the tubes to slide in on the shocks. The Air Pump fittings seemed to fit fairly easy, even with the new o-rings.

The air seems to be holding, haven't checked with a trailer on yet.

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