Quick help guys
 

Is this black stuff something that used to be in there, like a rubber boot or something? Or is it just carbon build up that needs to be scraped off? These are the port actuator rods off of my '85 GSL-SE. Looks like it's crumbling off already. Want to make sure before buttoning everything up. Thanks in advanced.
https://cimg2.ibsrv.net/gimg/www.rx7...ec5b60706d.jpg
https://cimg3.ibsrv.net/gimg/www.rx7...7f4be64a7b.jpg