LV can and service kit came today. Easy enough to change the cans - just as you all said it would be.
Since I had 700+ miles on the shock, I got the service kit too. I replaced the upper body seal and backup rings, the new LV can came with wiper and seals already installed. Screwed everything together with the healthy dose of Float fluid, pumper her up to 200 psi and now I swear I have a slight scraping sound on the inside. The noise is on initial stroke only, if I'm on the bike and load the suspenion past the sag point, no scraping noise.
My gut said a backup ring was lightly scraping the inside of the LV can on initial stroke. Unscrewed everything, couldn't find anything amiss, no markings on the inside of the can, nothing on the exposed shock piston - some bubbly float fluid (is it supposed to bubble - I would think it would resist bubbling to provide consistency like automatic tranny fluid) but nothing out of the ordinary. When I installed the new backup rings and upper body (quadrangle?) seal, the upper ring was gapped a bit more than the lower one, though, in my opinion, it didn't stick out there far enough to prevent the seal from working. Every new seal was lubed really well so it's not stiction.
My only other theories are cavitation noise or a cable stop somewhere between the top tube and seatstay. I'm pretty positive it's neither, the cable stop sounds a bit different and cavitation of the fluid, in my uneducated guess, be present throughout more of the stroke.
I suspect this backup ring will eventually seat itself or the edge that slightly rubs will wear in - it's holding air, working fine, just the type-A homer in me can't stop obsessing over this minor noise (which I can't hear over the noise of my Hope hub
Any wisdom from the shock gurus?
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