When I insert the gas pump nozzle into the car I notice that the car's metal intake and surrounding rubber moves. Does anyone else experience this?
yes, I notice the same. Being nonmechanical I just ignore it and assume that is the way the gas bladder is supposed to be. Hasn't exploded yet.
The rubber filler reducer is the bladder extension up the fuel filler pipe on the tank. Perfectly normal to move around. I'll dig out a drawing of the tank/bladder relationship and post it.
Is there a diagram out there somewhere for the Euro non-bladder tank? It would be interesting to compare the two, what with the center drain in the bladder one leading to the pump...
