One of the pistons popped out of the caliper on my Avid Elixir 5 brakes. Can I just put the piston back in and bleed the brakes and then they will be good as new, or do I have to rebuild the whole caliper?
sram has always been awesome about providing excellent manuals for their products.
I would recommend a quick rebuild to make sure the seal for the caliper isn't damaged. See page #19 of the above PDF.
Should be easy, just be ready to bleed your brakes ... ( a pain with elixers ... sorry!)