uhoh found this while changing oil tonight, update 1/21/13
Not hollow. Its pinched in the middle and broken. It also has a lot of scarring on it. I would guess from being kicked around in the motor.Is it hallow? Looking at the motor on the BRP parts view there does not seem to be any part that small in side other than the oiler jets. All the pins or shafts look to big in comparison to the drain plug. There are a few small pins on the oil pump gear, but you would know if it was not pumping oil.
i agree, it may have been poor assembly by some one, i dont see any part that could be, and if it was im sure you would have other big time signs. however, i would take it to dealer, without oil in it, drain plus out and those pienes and say your seriously worried, make them open it up and see that no issues or damages exist and get it on the record for future use if need be. but im betting its all ok. but i would not tell the dealer that, make them go over it big time and most important notify brp so they can fire someone.